Department of Astronomy &
Center for Space Physics 
Professor Harlan Ernest Spence
Associate Professor

Invited Talks, Contributed Talks, Colloquia and Seminars

Invited Conference/Workshop Presentations and Lectures (38 as of October 1999)

  1. McComas, D. J., and H. E. Spence, The average magnetic field configuration and consistent plasma properties in the Venus magnetotail, EOS Trans. AGU, 66, invited presentation at the 1985 Fall AGU meeting, San Fransisco, CA, Dec 1985.
  2. Kivelson, M. G., and H. E. Spence, MHD stability of the quiet magnetotail, EOS Trans. AGU, 69, 1398, invited presentation at the 1988 Fall AGU meeting, San Fransisco, CA, Dec 1988.
  3. Spence, H. E., Predictions of the finite tail plasmasheet convection model: pressure, number density, and “effective” polytropic index, proceedings of and invited presentation to the 2nd Huntsville Workshop on Magnetosphere/Ionosphere Plasma Models, p. 23, Huntsville, AL, Oct 1989.
  4. Spence, H. E., Auroral current sheets: results from a statistical analysis of MAGSAT data, proceedings of the 1990 Yosemite meeting, p. 15, invited presentation at the 1990 Yosemite Meeting: Transition Regions in Solar System Plasmas, Yosemite National Park, CA, Feb 1990.
  5. Spence, H. E., Thermodynamics of the plasma sheet: a review of recent progress, XX General Assembly IUGG/IAGA Program and Abstracts, p. 373, invited presentation at the XX General Assembly IUGG/IAGA meeting, Vienna, Austria, Aug 1991.
  6. Spence, H. E., Physics of the recovery phase including plasma sheet expansion, invited presentation at the 1991 Workshop on the Plasma Physics of Magnetospheric Substorms, Fairbanks, AK, Sep 1991.
  7. Roeder, J. L., H. C. Koons, M. Schulz, H. E. Spence, and M. C. McNab, Where is the source of the difuse auroral electron precipitation, invited presentation at the 1992 AGU Chapman Conference on Micro- and Mesoscale Phenomena in Space Plasmas, Kauii, Hawaii, February 17-22, 1992.
  8. Spence, H. E., Assessment of the polytropic equation of state, invited presentation at the 3rd Huntsville Workshop on Magnetosphere/Ionosphere Plasma Models,  Huntsville, AL, Oct 1992.
  9. Spence, H. E., Magnetotail convection modeling, invited presentation given at the NASA/GSFC Workshop on Magnetospheric Modeling,  Greenbelt, MD, May 1994.
  10. Spence, H. E.,  Directions toward a synthesis of theoretical magnetotail models, invited presentation given at the NSF/GEM Snowmass ‘94  Workshop,  Snowmass, CO,  June 1994.
  11. Spence, H. E., Theoretical and observational tools for elucidating plasma sheet dynamics and mapping, XXI General Assembly IUGG/IAGA Program and Abstracts,  invited presentation given at the XXI General Assembly IUGG/IAGA meeting,  Boulder, CO, July, 1995.
  12. Spence,  H. E., Electrostatic discharges on satellite surfaces and their effects on space systems,   EOS Trans. AGU, 76, 1995, invited presentation given at the 1995 Fall AGU meeting, San Fransisco, CA, Dec 1995.
  13. Baker, D.N. H. E. Spence, and J. B. Blake, ISTP and cosmic plasma processes: relativistic particle acceleration and global energy transport, invited presentation given at the 31st Committee on Space Research Scientific Assembly, COSPAR Abstracts, page 177, Birmingham, England, July 1996.
  14. Spence, H. E., The substorm trigger controversy and observational constraints, EOS Trans. AGU, 77, 1996, invited presentation given at the 1996 Fall AGU meeting, San Fransisco, CA, Dec 1996.
  15. Spence, H. E., R. B. Sheldon, T. A. Fritz, J. Chen, J. B. Blake, J. F. Fennell, D. N. Baker, M. G. Henderson, M. Grande, M. G. Kivelson, and R. J. Walker, Polar Energetic Particles (PEPs): A new signature of the high-latitude magnetosphere, EOS Trans. AGU, 77, 1996, invited presentation given at the 1996 Fall AGU meeting, San Fransisco, CA, Dec 1996.
  16. Spence, H. E., G. D. Reeves, and J. B. Blake, First global movies of geospace from the NASA/POLAR satellite: “Imaging the Invisible”,  invited presentation given at the Sun-Earth Connections: New Findings from ISTP press conference, San Fransisco, CA, 16 Dec 1996.
  17. Spence, H. E., Science highlights from the Global Geospace Science Mission: systemic responses of the magnetosphere, invited presentation given at the NASA Sun-Earth Connections ISTP/GGS Senior Review, NASA Headquarters, Washington, DC, 9 June 1997.
  18. Spence, H. E., ISTP/POLAR New Science Results, invited presentation given at the 1997 NSF CEDAR Workshop, Boulder CO, 13 June 1997.
  19. Reeves, G. D. , D. N. Baker, R. D. Belian, J. B. Blake, T. E. Cayton, J. F. Fennell, R. H. W. Friedel, M. G. Henderson, S. G. Kanekal, X. Li, M. M. Meier, T. G. Onsager, R. S. Selesnick, and H. E. Spence, Relativistic Electron Response to the January 1997 Magnetic Cloud: Coordinated Observations from 12 Satellites, IAGA General Assembly, Uppsala,

    20. Sweden, Aug. 5-15, 1997.
  20. Petschek, H E, R. B. Sheldon, H. E. Spence, G. L. Siscoe, and A. Sergienko, Systems Study of Magnetospheric Mapping Mission, EOS Trans. AGU, 78, 1997, invited presentation given at the 1997 Fall AGU meeting, San Fransisco, CA, Dec 1997.
  21. Spence H. E. , A. M. Jorgensen, T. A. Fritz, R. B. Sheldon, M. G. Henderson, G. D. Reeves, J. B. Blake, J. F. Fennell, and D. N. Baker, The Substorm Injection Revealed: Global ENA Images and Simultaneous Multipoint Observations of the Substorm Lifecycle, EOS Trans. AGU, 78, 1997, invited presentation given at the 1997 Fall AGU meeting, San Fransisco, CA, Dec 1997.
  22. Reeves G. D., R. H. W. Friedel, M. G. Henderson, R. D. Belian, T. E. Cayton, M. M. Meier, D. N. Baker, X. Li, S. Kanekal, J. B. Blake, J. F. Fennell, R. S. Selesnick, T. Onsager,  and H. E. Spence, Relativistic Electron Flux Variations: A New, Global, ISTP Perspective, EOS Trans. AGU, 78, 1997, invited presentation given at the 1997 Fall AGU meeting, San Fransisco, CA, Dec 1997.
  23. Spence H. E. , H. E. Petschek, R. B. Sheldon, G. L. Siscoe, A. Sergienko, G. Bevis, C. Rayburn, and J. Vickers, Magnetospheric Mappint Mission: a status report on the new missions concept for a magnetospheric constellation, proceedings of Yosemite 1998 - Towards Solar Max 2000: The Present Accomplishments and Future Opportunities of ISTP and GEM, invited presentation given at the 1998 Yosemite meeting,Yosemite, CA, Feb 1998.
  24. Spence H. E. , A. M. Jorgensen, T. A. Fritz, R. B. Sheldon, M. G. Henderson, G. D. Reeves, J. B. Blake, J. F. Fennell, and D. N. Baker, Imaging the substorm injection using global ENA images and simultaneious multipoint observations, proceedings of Yosemite 1998 - Towards Solar Max 2000: The Present Accomplishments and Future Opportunities of ISTP and GEM, invited presentation given at the 1998 Yosemite meeting,Yosemite, CA, Feb 1998.
  25. Reeves, G. D. , H. E. Spence, M. G. Henderson, and A. Jorgensen, Energetic Neutral Atom (ENA) Bursts Measured by POLAR and Their Relationship to Magnetospheric Substorms, ICS-4, Lake Hamana, Japan, March 9-13, 1998.
  26. Antiochos, S., J. Luhmann, T. Onsager, H. E. Spence, J. Birn, and G. L. Siscoe, Where Should ISTP Go From Here?, invited panel discussions at the ISTP Science Workshop, NASA/GSFC, Greenbelt, MD, April, 1998.
  27. Jorgensen, A. M.., H. E. Spence, M. G. Henderson, G. D. Reeves, and E. C. Roelof, Relations Between the DST Index and Energetic Neutral Atom (ENA) Emissions From the Ring Current, EOS Trans. AGU, 79, 1998, presented at the 1998 Spring AGU meeting, Boston, MA, May 1998.
  28. Spence, H. E.,  A. M. Jorgensen, J. Simmerer, G. D. Reeves, and M. G. Henderson, Global Aspects of Geomagnetic Substorms Through Energetic Neutral Atom (ENA) Imaging, EOS Trans. AGU, 79, 1998, presented at the 1998 Spring AGU meeting, Boston, MA, May 1998
  29. Spence, H. E., A. M. Jorgensen, J. B. Blake, G. D. Reeves, and M. G. Henderson, Space Weather Applications of NASA/POLAR Energetic Neutral Atom Imaging, presented at the 1998 Western Pacific Geophysics Meeting, Taipei, Taiwan, July, 1998.
  30. Reeves, G. D. , M. G. Henderson, H. E. Spence, A. M. Jorgensen, and J. B. Blake, Energetic Particle Dynamics Seen Through Neutral Atom Images, AGU Western Pacific Geophysics Meeting, Taipei, Taiwan, July 21-24, 1998.
  31. Henderson, M. G. , G. D. Reeves, A. M. Jorgensen, and H. E. Spence, Equatorial Ion Distributions Derived from POLAR CEPPAD/IPS Energetic Neutral Atom Images, Sixth Huntsville Modeling Workshop, "The New Millennium Magnetosphere: Integrating Imaging, Discrete Observations, and Global Simulations", Guntersville, Alabama, 26-30 October 1998.
  32. Spence, H. E., J. B. Blake, M. G. Henderson, A. Jorgensen, G. Reeves, Energetic neutral atom imaging of the Earth's magnetosphere:  NASA/POLAR spacecraft results, presented at the 40th Annual Meeting of the Division of Plasma Physics of the American Physical Society, New Orleans, 16-20 November, 1998.
  33. Spence, H. E., H. Petschek, C. Rayburn, R. Sheldon, and G. Siscoe, Magnetospheric constellations: preparing for a new horizon, presented at the Fall 1998 American Geophysical Union Meeting, San Fransisco, CA, December, 1998.
  34. Spence, H. E. , Progress and Outstanding Problems on the Relationship of the Ring Current, Magnetotail, and Geomagnetic Storms and Magnetospheric Substorms, Paper SM31C-08 EOS, 1999 Spring AGU Meeting supplement, S282, 1999.
  35. Kistler, L. M., J. Slavin, J. Burch, C. W. Carlson, B. Mauk, J. Thayer, R. Heelis, H. Spence, The status of the Sun-Earth connection Quest 2: how do  the Earth and planets respond, presented at the Spring 1999 American Geophysical Union Meeting, Boston, MA 1-4 June 1999.
  36. Henderson, M. G. , G. D. Reeves, A. M. Jorgensen, H. E. Spence, J. F. Fennell, and J. B. Blake, Energetic Neutral Atom Imaging of the Inner Magnetosphere: Results From Polar, presented at the AGU Spring Meeting, Boston, MA, June 1-4, 1999.
  37. Spence, H. E., J. F. Fennell, J. L. Roeder, R. Friedel, T. A. Fritz, K. L. Hirsch, M. Alothman, M. Grande, M. Kivelson, and J. Green, Mapping the high-latitude, high-altitude extension of the plasma sheet using polar energetic particle observations, presented at the IUGG 1999 Meeting, Birmingham, England, 19-30 July 1999.
  38. Spence, H. E., J. L. Roeder, J. F. Fennell, R. Friedel, T. A. Fritz, and M. Grande, Magnetosphere-ionosphere coupling: how do oxygen ions get into the storm-time ring current and why is there a delay?, presented at the IUGG 1999 Meeting, Birmingham, England, 19-30 July 1999.

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Contributed Conference/Workshop Presentations (155 as of October 1999):
  1. Spence, H. E., K. Janes, and K. Brecher, Variations in the temperature of FG Sagittae since 1933, Bull. Am. Astron. Soc., 12, 805, presented at the 157th meeting of the American Astronomical Society, Albuquerque, NM, Jan 1981.
  2. Spence, H. E., M. Mendillo, and S. Zalesak, Airglow patterns for plasma instability models of the equatorial ionosphere, EOS. Trans. AGU,  64, 786, presented at the 1983 Fall AGU Meeting, San Fransisco, CA, Dec 1983.
  3. Spence, H. E., R. J. Walker, and M. G. Kivelson, Average field-aligned currents derived from an empirical magnetospheric magnetic field model, EOS. Trans. AGU, 65, 1057, presented at  the 1984 Fall AGU Meeting, San Fransisco, CA, Dec 1984.
  4. Spence, H. E., M. G. Kivelson, and R. J. Walker, Average high-latitude, field-aligned currents derived from an empirical magnetospheric magnetic field model, Proceedings of the 5th IAGA General Assembly,  2, 253, presented at the 5th IAGA General Assembly, Prague, Czechoslovakia, Aug 1985.
  5. McComas, D. J., H. E. Spence, C. T. Russell, and M. A. Saunders, The average configuration of the induced Venus magnetotail,  Proceedings of the 1985 AGU Chapman Conference of Magnetotail Physics, 1,  presented at the 1985 AGU Chapman Conference on Magnetotail Physics, Johns Hopkins University, Applied Physics Laboratory, Laurel, MD, Oct 1985.
  6. Spence, H. E., M. G. Kivelson, and R. J. Walker, Energetic ion distribution functions inferred from an empirical magnetospheric magnetic field model, Proceedings of the 1985 AGU Chapman Conference of Magnetotail Physics, 1,  pg. I.5, presented at the 1985 AGU Chapman Conference on Magnetotail Physics, Johns Hopkins University, Applied Physics Laboratory, Laurel, MD, Oct 1985.
  7. Spence, H. E., M. G. Kivelson, and R. J. Walker, Average energetic ion distribution functions and field-aligned currents inferred from an empirical magnetospheric magnetic field model,  EOS. Trans. AGU,  66 , 1046, presented at the 1985 Fall AGU meeting, San Fransisco, CA, Dec  1985.
  8. Spence, H. E., M. G. Kivelson, and R. J. Walker, Self-consistent plasma pressure gradients and anisotropies inferred from an empirical magnetospheric magnetic field model,  EOS. Trans. AGU,  67,  1173, presented at the 1986 Fall AGU meeting, San Fransisco, CA, Dec 1986.
  9. Kivelson, M. G., H. E. Spence, and R. J. Walker, Current carriers in a phenomenological magnetic field model,  Proceedings of the 6th International SCOSTEP, pg. 48,  presented at the XXVI COSPAR meeting, Toulouse, France, July 1986.
  10. Spence, H. E., M. G. Kivelson, and R. J. Walker, Dipole tilt and the location of field-aligned currents in the auroral ionosphere,  EOS. Trans. AGU,  68, 386, presented at the 1987 Spring AGU meeting, Baltimore, MD, May 1987.
  11. Spence, H. E., M. G. Kivelson, and R. J. Walker, Equatorial plasma pressure gradients and anisotropies inferred from magnetospheric magnetic field models,  proceedings of the International School for Space Simulations-3: Part 2 Book of Abstracts, pg.137, presented at the ISSS-3 meeting, Beaulieu, France, June 1987.
  12. Spence, H. E., M. G. Kivelson, and R. J. Walker, Quiet time equatorial plasma pressure gradients and anisotropies inferred from magnetospheric magnetic field models,  proceedings of the IUGG XIX General Assembly Abstracts,  2, 571, presented at the XIX General Assembly of the IUGG/IAGA, Vancouver, B.C., Aug 1987.
  13. Spence, H. E., M. G. Kivelson, and R. J. Walker, The dynamics of the nightside field-aligned currents and their linkage to the near-Earth magnetotail,  proceedings of the IUGG XIX General Assembly Abstracts,  2, 571, presented at the XIX General Assembly of the IUGG/IAGA, Vancouver, B.C., Aug 1987.
  14. Spence, H. E., M. G. Kivelson, and R. J. Walker, Magnetotail plasma pressure distributions:  observations and empirical models,  EOS. Trans. AGU,  68, 1422, presented at the 1987 Fall AGU meeting, San Fransisco, CA, Dec 1987.
  15. Spence, H. E., M. G. Kivelson, and R. J. Walker, An analysis of new empirical magnetospheric magnetic field models,  EOS. Trans. AGU,  69, 427, presented at the 1988 Spring AGU meeting, Baltimore, MD, May 1988.
  16. Spence, H. E., M. G. Kivelson, and R. J. Walker, Comparison of field-aligned currents at ionospheric and magnetospheric altitudes,  presented at the XXVII COSPAR, Espoo, Finland, July 1988.
  17. Spence, H. E., M. G. Kivelson, and R. J. Walker, Magnetotail plasma pressures:  empirical models, observations, and implications for MHD stability,  EOS. Trans. AGU,  69, 1398, presented at the 1988 Fall AGU meeting, San Fransisco, CA, Dec 1988.
  18. Spence, H. E., M. G. Kivelson, and R. J. Walker, The dependence of ionospheric Birkeland currents on magnetic activity and dipole tilt,  EOS. Trans. AGU,  70, 448, presented at the 1989 Spring AGU meeting, Baltimore, MD, May 1989.
  19. Walker, R. J., H. E. Spence, and T. Ogino, Pressure gradients and magnetospheric convection in the quiet magnetosphere:  a comparison between simulations and observations,  EOS. Trans. AGU,  70, 432, presented at the 1989 Spring AGU meeting, Baltimore, MD, May 1989.
  20. Kivelson, M. G., and H. E. Spence,  Convective stability of the magnetotail and the possible role of a critical cross tail potential in substorm dynamics, IAGA Bulletin No. 53 - Part C: Abstracts, pg. 416, presented at the 6th IAGA Assembly, Exeter, England, July 1989.
  21. Spence, H. E., M. G. Kivelson, and R. J. Walker,  Dynamics of the ionospheric Birkeland currents and their linkage to magnetospheric source regions, IAGA Bulletin No. 53 - Part C: Abstracts, pg. 421, presented at the 6th IAGA Assembly, Exeter, England, July 1989.
  22. Spence, H. E., and M. G. Kivelson,  The ``effective'' plasma sheet polytropic index along the midnight meridian in a finite width magnetotail,  EOS. Trans. AGU,  70,  1297, presented at the 1989 Fall AGU meeting, San Fransisco, CA, Dec 1989.
  23. Walker, R. J., T. Ogino, and H. E. Spence, A global magnetohydrodynamic simulation of convection in the quiet magnetosphere,  EOS. Trans. AGU,  70, 1290, presented at the 1989 Fall AGU meeting, San Fransisco, CA, Dec 1989.
  24. Kivelson, M. G., and H. E. Spence,  Properties of the plasma sheet plasma:  how the finite width of the tail modifies predictions of adiabatic convection models,  presented at the XXVII COSPAR 1990 meeting, The Hague, Netherlands, June 1990.
  25. Spence, H. E., and M. G. Kivelson,  Contributions of the low-latitude boundary layer to the finite width magnetotail convection model,  EOS. Trans. AGU,  71, 1545, presented at the 1990 Fall AGU meeting, San Fransisco, CA, Dec 1990.
  26. Gorney, D. J., and H. E. Spence,  Auroral observations using two nearly co-located DMSP satellites,  EOS. Trans. AGU,  71, 1553, presented at the 1990 Fall AGU meeting, San Fransisco, CA, Dec 1990.
  27. Lin, N., M. J. Engebretson, H. E. Spence, R. J. Strangeway, and T. A. Potemra, Observations of a constant frequency transverse Pc4 Wave with a large radial extent,  EOS. Trans. AGU,  71, 1528, presented at the 1990 Fall AGU meeting, San Fransisco, CA, Dec 1990.
  28. Lopez, R. E., C.-I. Meng, H. E. Spence, and F. Rich, Substorm aurorae and their connection to the inner magnetotail,  presented at the conference on Active Phenomena in Solar System Plasma Physics, Hong Kong, Feb 1991.
  29. Spence, H. E., and D. J. Gorney,  Simultaneous measurements of omega bands at ionospheric and magnetospheric altitudes, EOS. Trans. AGU,  72, 248, presented at the 1991 Spring AGU meeting, Baltimore, MD, May 1991.
  30. Watermann, J., O. de la Beaujardiere, and H. E. Spence, Space-time structure of the morning aurora obtained from coincident DMSP-F6, -F8, and Sondrestrom incoherent scatter radar observations,  EOS. Trans. AGU,  72, 232, presented at the 1991 Spring AGU meeting, Baltimore, MD, May 1991.
  31. Takahashi, K., N. Sato, H. Lühr, J. Warnecke, Y. Tonegawa, H. E. Spence, and R. B. Sheldon, Ground-satellite observations of a giant pulsation,  EOS. Trans. AGU,  72, 254, presented at the 1991 Spring AGU meeting, Baltimore, MD, May 1991.
  32. Lopez, R. E., H. E. Spence, K. Takahashi, A. T. Y. Lui, R. W. McEntire, T. A. Potemra, C.-I. Meng, and F. Rich, Coordinated observations of a substorm initiation in the near-Earth magnetotail,  EOS. Trans. AGU,  72, 248, presented at the 1991 Spring AGU meeting, Baltimore, MD, May 1991.
  33. Spence, H. E., and D. J. Gorney, The coherence of auroral arcs observed with two nearly co-located DMSP satellites, XX General Assembly IUGG/IAGA Program and Abstracts, pg. 470, presented at the XX General Assembly IUGG/IAGA meeting,  Vienna, Austria, Aug 1991.
  34. Watermann, J., O. de la Beaujardiere, and H. E. Spence, Space-time structure of the morning aurora obtained from coincident DMSP-F6, -F8, and Sondrestrom incoherent scatter radar observations, XX General Assembly IUGG/IAGA Program and Abstracts, pg. 470, presented at the XX General Assembly IUGG/IAGA meeting,  Vienna, Austria, Aug 1991.
  35. Takahashi, K., D. G. Sibeck, P. T. Newell, and H. E. Spence, ULF waves in the magnetosheath and the low-latitude boundary layer and their relationship to magnetospheric pulsations, XX General Assembly IUGG/IAGA Program and Abstracts, pg. 481, presented at the XX General Assembly IUGG/IAGA meeting,  Vienna, Austria, Aug 1991.
  36. Spence, H. E., and  D. J. Gorney,  Mapping of omega-band structures from the ionosphere to the magnetosphere, XX General Assembly IUGG/IAGA Program and Abstracts, pg. 433, presented at the XX General Assembly IUGG/IAGA meeting,  Vienna, Austria, Aug 1991.
  37. Lopez, R. E., C.-I. Meng, H. E. Spence, and  F. Rich,  Substorm aurorae and their connection to the inner magnetotail,  XX General Assembly IUGG/IAGA Program and Abstracts,  pg. 437, presented at the XX General Assembly IUGG/IAGA meeting,  Vienna, Austria, Aug 1991.
  38. de la Beaujardiere, O., L. Lyons, H. E. Spence, E. Friis-Christensen, and C. Danielsen, Ionospheric electrodynamics and estimates of the reconnection electric field during quiet and stable conditions,  EOS. Trans. AGU,  72, 419, presented at the 1991 Fall AGU meeting, San Fransisco, CA, Dec 1991.
  39. Spence, H. E., and O. de la Beaujardiere,   Mapping seasonally-dependent ionospheric electric potentials to the magnetospheric equator,  EOS. Trans. AGU,  72, 360, presented at the 1991 Fall AGU meeting, San Fransisco, CA, Dec 1991.
  40. Spence, H. E., and J. L. Roeder,   Auroral electron and ion precipitation patterns mapped to the magnetospheric equatorial plane,  EOS. Trans. AGU,  73, 257, presented at the 1992 Spring AGU meeting, Montreal, Quebec, Canada, May 1992.
  41. Spence, H. E., L. R. Lyons, and W. F. Denig, Cusp and boundary layer structure and stability determined from the dual DMSP-F6 and DMSP-F8 spacecraft, presented at the 1992 IAGA meeting, Argentina, July 1992.
  42. Spence, H. E., and J. F. Fennell,   Features in the geostationary magnetic field and plasma associated with substorm recovery phase,  EOS. Trans. AGU,  73, 451, presented at the 1992 Fall AGU meeting, San Fransisco, CA, Dec 1992.
  43. Spence, H. E., L. R. Lyons, J. L. Roeder, and W. F. Denig, Cusp and boundary layer structure and motion determined from the dual DMSP-F6 and DMSP-F8 spacecraft,  EOS. Trans. AGU,  74, presented at the 1993 Spring AGU meeting, Baltimore, MD, May 1993.
  44. Lopez, R. E. , and H. E. Spence, Substorm electrojets and source regions in the magnetotail,  EOS. Trans. AGU,  74,  presented at the 1993 Spring AGU meeting, Baltimore, MD, May 1993.
  45. Angelopolous, V., C. F. Kennel, F. V. Coroniti, R. Pellat, H. E. Spence, M. G. Kivelson, R. J. Walker, C. T. Russell, W. Baumjohann, W. C. Feldman, and J. T. Gosling, Characteristics of ion moments in the quiet inner plasma sheet,  EOS. Trans. AGU,  74, presented at the 1993 Spring AGU meeting, Baltimore, MD, May 1993.
  46. Fennell, J. F., J. L. Roeder, H. E. Spence, M. Grande, and S. Livi, CRRES observations of local morning and evening flux dropout events,  EOS. Trans. AGU,  74, presented at the 1993 Spring AGU meeting, Baltimore, MD, May 1993.
  47. Spence, H. E., L. R. Lyons, J. L. Roeder, and W. F. Denig, Cusp and boundary layer structure and motion determined from the dual DMSP-F6 and DMSP-F8 spacecraft, presented at the 1993 NSF GEM Workshop - Boundary Layer Campaign, Snowmass, CO, June 1993.
  48. Fennell, J. F., J. L. Roeder, H. E. Spence, M. Grande, and S. Livi, CRRES observations of local morning and evening flux dropouts,  EOS. Trans. AGU,  74, presented at the 1993 Fall AGU meeting, San Fransisco, CA, Dec 1993.
  49. Lopez, R. E., E. F. Donovan, H. E. Spence, and S. Ohtani, The effects of field-aligned currents on magnetic mapping to the near-Earth magnetosphere: a nightside, substorm case study,  EOS. Trans. AGU,  74, presented at the 1993 Fall AGU meeting, San Fransisco, CA, Dec 1993.
  50. Spence, H. E., L. A. Frank, W. R. Paterson, and M. G. Kivelson, The Galileo Earth-1 flyby: comparison of the finite width tail convection model with observations,  EOS. Trans. AGU,  74,  presented at the 1993 Fall AGU meeting, San Fransisco, CA, Dec 1993.
  51. Spence, H. E., J. B. Blake, J. F. Fennell, and H. Koons, Diagnosis of high-altitude spacecraft anomalies:  phenomenology and expert system analysis, EOS Trans. AGU,  75, presented at the 1994 Spring AGU meeting, Baltimore, MD, May 1994.
  52. Freisen, L. M.,  J. B. Blake, J. F. Fennell, and H. E. Spence,  Observations of energetic electrons and protons in an elliptical, high altitude, high inclination orbit, EOS Trans. AGU,  75, presented at the 1994 Fall AGU meeting, San Fransisco, CA, December 1994.
  53. Spence, H. E., K. L. Hirsch, and T. Onsager,  Quasi-static auroral precipitation signatures inferred from magnetotail particle transport models, EOS Trans. AGU,  75, presented at the 1994 Fall AGU meeting, San Fransisco, CA, December 1994.
  54. Ohtani, S.-I., H. E. Spence, K. Takahashi, T. Higuchi, and A. T. Y. Lui, AMPTE/CCE and SCATHA simultaneous observations of magnetic signatures associated with a substorm onset, EOS Trans. AGU,  76, presented at the 1995 Spring AGU meeting, Baltimore, MD, May 1995.
  55. Friesen, L. M., J. B. Blake, D. N. Baker, G. D. Reeves, H. E. Spence, K. Yumoto, and K. Shiokawa, Substorm observations by an extensive network of satellite and ground-based sensors, EOS Trans. AGU,  76, presented at the 1995 Spring AGU meeting, Baltimore, MD, May 1995.
  56. Spence, H. E., K. L. Hirsch, and T. Onsager,  Local time dependence of auroral precipitation inferred from magnetotail particle transport models, EOS Trans. AGU,  75, 1995 Spring AGU meeting, Baltimore, MD, May 1995 and as a poster at the GEM 1995 Snowmass Workshop, June, 1995.
  57. Spence, H. E., K. L. Hirsch, and T. Onsager,  Quasi-static auroral precipitation signatures inferred from magnetotail particle transport models, XXI General Assembly IUGG/IAGA Program and Abstracts,  presentation given at the XXI General Assembly IUGG/IAGA meeting,  Boulder, CO, July, 1995.
  58. Hirsch, K. L., H. E. Spence,  T. G. Onsager, and M. Thomsen, A case study of the local-time dependence at mid-altitudes of the plasma sheet,   EOS Trans. AGU, 76, 1995, presented at the 1995 Fall AGU meeting, San Fransisco, CA, Dec 1995.
  59. Jorgensen, A. M., H. E. Spence, T. J. Hughes, and D. McDiarmid,  A study of Ps-6 pulsations and omega bands on the ground, at low altitude and at high altitude,   EOS Trans. AGU, 76, 1995, presented at the 1995 Fall AGU meeting, San Fransisco, CA, Dec 1995.
  60. Blake, J. B., D. N. Baker, G. D. Reeves, H. E. Spence, P. C. Anderson, K. Yumoto, K. Shiokawa, S. Kokubun, R. Nakamura, and T. Yamamoto,  Observation of an isolated substorm by an extensive network of satellite and ground-based sensors,   EOS Trans. AGU, 76, 1995, presented at the 1995 Fall AGU meeting, San Fransisco, CA, Dec 1995.
  61. Sheldon, R. B., and H. E. Spence, Signature of the Alfven boundary as seen in the high latitude POLAR orbit, EOS Trans. AGU,  77, presented at the 1996 Spring AGU meeting, Baltimore, MD, May 1996.
  62. Spence, H. E., R. B. Sheldon, J. B. Blake, J. F. Fennell, and G. D. Reeves,  The off-equatorial energetic particle environment measured by the POLAR CEPPAD/IPS sensor, EOS Trans. AGU,  76, 1996 Spring AGU meeting, Baltimore, MD, May 1996.
  63. Roeder, J. L., J. F. Fennell,  H. E. Spence, and W. J. Hughes, Statistical model of energetic ion distribution moments in the inner magnetosphere, EOS Trans. AGU, 77, 1996, presentation given at the 1996 Spring AGU meeting, Baltimore, MD, May 1996.
  64. Spence, H. E., A. M. Jorgensen, J. F. Fennell, and J. L. Roeder, Towards inner magnetosphere particle and field models, presentation given at the 31st Committee on Space Research Scientific Assembly, COSPAR Abstracts, page 213, Birmingham, England, July 1996.
  65. Sheldon, R. B. and H. E. Spence, Signatures of the Alfven boundary as seen in the high latitude POLAR orbit,  presentation given at the 31st Committee on Space Research Scientific Assembly, COSPAR Abstracts, page 217, Birmingham, England, July 1996.
  66. Jorgensen, A. M., H. E. Spence, D. McDiarmid, and T. J. Hughes, The coupling between auroral omega bands and the inner magnetosphere,  presentation given at the 31st Committee on Space Research Scientific Assembly, COSPAR Abstracts, page 223, Birmingham, England, July 1996.
  67. Hirsch, K. L., H. E. Spence, T. G. Onsager, and M. F. Thomsen, Magnetotail particle profiles deduced from high-inclination crossings of the plasma sheet,  presentation given at the 31st Committee on Space Research Scientific Assembly, COSPAR Abstracts, page 225, Birmingham, England, July 1996.
  68. Roeder, J. L., J. F. Fennell,  H. E. Spence, and W. J. Hughes, Statistical model of energetic ion distribution moments in the inner magnetosphere, presentation given at the 31st Committee on Space Research Scientific Assembly, COSPAR Abstracts, page 213, Birmingham, England, July 1996.
  69. Reeves, G. D., M. G. Henderson, H. E. Spence, R. B. Sheldon, A. M. Jorgensen, J. B. Blake, and J. F. Fennell, First Energetic Neutral Atom Images from POLAR, presented at the AGU Chapman Conference, Kanazawa Japan, November 5-9, 1996.
  70. Turner, N. E., D. N. Baker, T. I. Pulkinnen, H. J. Singer, T. Onsager, F. Mozer, H. E. Spence, R. P. Lepping, K. W. Ogilvie, and J. B. Blake, Multi-spacecraft study of electric field penetration into the Earth’s magnetosphere, presented at the AGU Chapman Conference, Kanazawa, Japan, November 5-9, 1996.
  71. Grande, M., C. H. Perry, B. Kellett, J. Fennell, S. Livi, H. Spence, and T. Fritz, Magnetosheath ion populations seen on 29 May and 20 June 1996, EOS Trans. AGU, 77, 1996, presented at the 1996 Fall AGU meeting, San Fransisco, CA, Dec 1996.
  72. Roeder, J. L., J. F. Fennell,  H. E. Spence, and W. J. Hughes, Statistical model of energetic ion distribution moments in the inner magnetosphere, EOS Trans. AGU, 77, 1996, presented at the 1996 Fall AGU meeting, San Fransisco, CA, Dec 1996.
  73. Chen, J.,  T. A. Fritz, R. Sheldon, H. Spence, and W. N. Spjeldvik, Solar energetic particle event on 8/27/96 observed by POLAR spacecraft, EOS Trans. AGU, 77, 1996, presented at the 1996 Fall AGU meeting, San Fransisco, CA, Dec 1996.
  74. Spence, H. E.  R. B. Sheldon, T. A. Fritz, J. Chen, J. B. Blake, J. F. Fennell, M. G. Henderson, G. D. Reeves, and D. J. Williams, First energetic neutral atoms (ENAs) measured by POLAR: ENA source regions at both low and high altitudes, EOS Trans. AGU, 77, 1996, presented at the 1996 Fall AGU meeting, San Fransisco, CA, Dec 1996.
  75. Richard, R. L., R. J. Walker, H. E. Spence, J. B. Blake, J. F. Fennell, and M. Ashour-Abdalla, High-latitude particle entry and acceleration for northward IMF, EOS Trans. AGU, 77, 1996, presented at the 1996 Fall AGU meeting, San Fransisco, CA, Dec 1996.
  76. Hirsch, K. L., H. E. Spence, S. P. Christon, and D. J. Williams, Linking the equatorial and high latitude extension of the plasma sheet using POLAR and GEOTAIL spacecraft, EOS Trans. AGU, 77, 1996, presented at the 1996 Fall AGU meeting, San Fransisco, CA, Dec 1996.
  77. Fennell, J. F., J. B. Blake, J. L. Roeder, H. E. Spence, and R. B. Sheldon, Tail lobe and open field line region boundaries at mid to high latitudes, EOS Trans. AGU, 77, 1996, presented at the 1996 Fall AGU meeting, San Fransisco, CA, Dec 1996.
  78. Maynard, N. C., D. R. Weimer, W. J. Burke, F. S. Mozer, J. D. Scudder, C. T. Russell, R. P. Lepping, K. W. Ogilvie, W. K. Peterson, and H. E. Spence, Cusp electrodynamics with northward IMF observed by POLAR, EOS Trans. AGU, 77, 1996, presented at the 1996 Fall AGU meeting, San Fransisco, CA, Dec 1996.
  79. Kawano, H.,  G. Le, X. W. Zhou, C. T. Russell, H. E. Spence, S. Kokubun, T. Mukai, T. Yamamoto, and Y. Saito, Initial POLAR MFE observations of substorm signatures in the polar magnetosphere, EOS Trans. AGU, 77, 1996, presented at the 1996 Fall AGU meeting, San Fransisco, CA, Dec 1996.
  80. Sullivan, J. D., R. B. Sheldon, T. A. Fritz, H. E. Spence, A. R. Contos, R. Selesnick, W. A. Kolasinski, A model of relativistic electron dynamics during magnetic storms, EOS Trans. AGU, 77, 1996, presented at the 1996 Fall AGU meeting, San Fransisco, CA, Dec 1996.
  81. Matthews, D. L., R. B. Sheldon, H. E. Spence, and W. N. Spjeldvik, Data-driven dynamic diffusion determination and consequences for theory, EOS Trans. AGU, 77, 1996, presented at the 1996 Fall AGU meeting, San Fransisco, CA, Dec 1996.
  82. Sheldon, R. B., and H. E. Spence, A new magnetic storm paradigm, EOS Trans. AGU, 77, 1996, presented at the 1996 Fall AGU meeting, San Fransisco, CA, Dec 1996.
  83. Turner, N. E., D. N. Baker, T. I. Pulkinnen, H. J. Singer, T. Onsager, F. Mozer, H. E. Spence, R. P. Lepping, K. W. Ogilvie, and J. B. Blake, Multi-spacecraft study of electric field penetration into the Earth’s magnetosphere, EOS Trans. AGU, 77, 1996, presented at the 1996 Fall AGU meeting, San Fransisco, CA, Dec 1996.
  84. Jorgensen, A. M., H. E. Spence, T. A. Fritz, W. J. Hughes, J. F. Fennell, and J. L. Roeder, Inner magnetosphere models in the ISTP era using POLAR with SCATHA, CRRES, DE-1, GOES-6 and -7,  EOS Trans. AGU, 77, 1996, presented at the 1996 Fall AGU meeting, San Fransisco, CA, Dec 1996.
  85. Reeves, G. D., M. G. Henderson, H. E. Spence, R. B. Sheldon, A. M. Jorgensen, J. B. Blake, and J. F. Fennell, First Energetic Neutral Atom Images from POLAR, EOS Trans. AGU, 77, 1996, presented at the 1996 Fall AGU meeting, San Fransisco, CA, Dec 1996.
  86. Sheldon, R.B., H. E. Spence, H. Petschek, and G. Siscoe, The magnetospheric mapping/multiprobe mission: The next generation, EOS Trans. AGU, 78, 1997, presented at the 1997 Spring AGU meeting, Baltimore, MD, May 1997.
  87. Jorgensen, A. M.,  H. E. Spence, M. G. Henderson, and G. D. Reeves, Diagnosing the state of the magnetosphere using energetic neutral atom (ena) measurements from the POLAR/CEPPAD experiment,  EOS Trans. AGU, 78, 1997, presented at the 1997 Spring AGU meeting, Baltimore, MD, May 1997.
  88. Higuchi, T., S. Ohtani, K. Takahashi,  H. E. Spence, A. T. Y. Lui, and J. F. Fennell, Fractal analysis: Application to satellite magnetic field measurements at substorm onsets,  EOS Trans. AGU, 78, 1997, presented at the 1997 Spring AGU meeting, Baltimore, MD, May 1997.
  89. Hirsch, K. L.,  H. E. Spence, and S. P. Christon, Mapping the off-equatorial plasma sheet using conjugate GEOTAIL and POLAR energetic particle measurements,  EOS Trans. AGU, 78, 1997, presented at the 1997 Spring AGU meeting, Baltimore, MD, May 1997.
  90. Chen, J., T. A. Fritz, R. B. Sheldon, H. E. Spence, J. F. Fennell, and S. Livi, Cusp energetic particle events discovered by POLAR spacecraft,  EOS Trans. AGU, 78, 1997, presented at the 1997 Spring AGU meeting, Baltimore, MD, May 1997.
  91. Baker, D. N., X. Li, T. Pulkinnen, S. G. Kanekal, R. Selesnick, M. G. Henderson, G. D. Reeves, and H. E. Spence, Coronal mass ejections, magnetic clouds, and relativistic magnetospheric electron events,  EOS Trans. AGU, 78, 1997, presented at the 1997 Spring AGU meeting, Baltimore, MD, May 1997.
  92. Richards, R. L., R. J. Walker, H. E. Spence, J. B. Blake, J. F. Fennell, and M. Ashour-Abdalla, Ion entry and acceleration in PEP’s, EOS Trans. AGU, 78, 1997, presented at the 1997 Spring AGU meeting, Baltimore, MD, May 1997.
  93. Thompson, S., and H. E. Spence, Multipoint analysis of high latitude dayside auroral particle precipitation:  a case study of “staircase” signatures, EOS Trans. AGU, 78, 1997, presented at the 1997 Spring AGU meeting, Baltimore, MD, May 1997.
  94. Sullivan, J. D., T. A. Fritz, R. B. Sheldon, and H. E. Spence, Relativistic electron spectra and rates from CEPPAD during January 1997, EOS Trans. AGU, 78, 1997, presented at the 1997 Spring AGU meeting, Baltimore, MD, May 1997.
  95. Henderson, M.G., G. D. Reeves, K. R. Moore, H. E. Spence, A. M. Jorgensen, J. F. Fennell, J. B. Blake, and E. C. Roelof, Energetic neutral atom imaging: Initial forward modelling results from the POLAR CEPPAD/IPS, EOS Trans. AGU, 78, 1997, presented at the 1997 Spring AGU meeting, Baltimore, MD, May 1997.
  96. Kawano, H., G. Le, C. T. Russell, S. Kokobun, T. Mukai, T. Yamamoto, G. Rostokder, and H. E. Spence, Magnetic signatures of substorms in the polar magnetosphere: POLAR MFE observations, EOS Trans. AGU, 78, 1997, presented at the 1997 Spring AGU meeting, Baltimore, MD, May 1997.
  97. Spence, H. E., H. E. Petschek, and N. U. Crooker, High-latitude merging and the orientation of the interplanetary magnetic field, EOS Trans. AGU, 78, 1997, presented at the 1997 Spring AGU meeting, Baltimore, MD, May 1997.
  98. Reeves, G. D. , D. N. Baker, R. D. Belian, J. B. Blake, T. E. Cayton, J. F. Fennell, R. H. W. Friedel, M. G. Henderson, S. G. Kanekal, X. Li, M. M. Meier, T. G. Onsager, R. S. Selesnick, and H. E. Spence, Relativistic Electrons During the January 1997 ISTP/Space Weather Event, Geospace Environment Modelling Meeting (GEM), Snowmass, CO, 16-20,

    99. June, 1997.
  99. Fennell, J. F. , J. L. Roeder, R. Friedel, M. Grande, and H. E. Spence,  Tail lobe and open field line region boundaries at high altitudes: Polar and 1995-034 results, ISSCTP Abstract Book, p. 28, 1997, presented at the 1997 International Symposium on Solar-Terrestrial Coupling, Processes, Paros, Greece, June 1997.
  100. Reeves, G. D. , D. N. Baker, R. D. Belian,  J. B. Blake, T. E. Cayton, J. F. Fennell,  R. H. W. Friedel, M. G. Henderson, X. Li, M. M. Meier, T. G. Onsager, R. Selesnick, and H. E. Spence, Relativistic electron response to the January 1997 magnetic cloud, ISSCTP Abstract Book, p. 44, 1997, presented at the 1997 International Symposium on Solar-Terrestrial Coupling, Processes, Paros, Greece, June 1997.
  101. Reeves, G. D., M. G. Henderson, A. M.  Jorgensen, H. E. Spence, J. B. Blake, and R. D. Belian, Global observations of the substorm injection region using energetic neutral atom imaging from Polar, ISSCTP Abstract Book, p. 45, 1997, presented at the 1997 International Symposium on Solar-Terrestrial Coupling, Processes, Paros, Greece, June 1997.
  102. Fritz, T. A. , J. Chen, R. B. Sheldon, H. E. Spence, W. N. Spjeldvik, J. F. Fennell, and S. Livi, Cusp energetic particle events measured by the Polar spacecraft , ISSCTP Abstract Book, p. 29, 1997, presented at the 1997 International Symposium on Solar-Terrestrial Coupling, Processes, Paros, Greece, June 1997.
  103. Henderson, M. G. , G. D. Reeves, K. R. Moore, H. E. Spence, A. M. Jorgensen, J. F. Fennell, J. B. Blake, and E. C. Roelof,  Energetic neutral atom images form the Polar/CEPPAD/IPS instrument: Initial forward modeling results, ISSCTP Abstract Book, p. 33, 1997, presented at the 1997 International Symposium on Solar-Terrestrial Coupling, Processes, Paros, Greece, June 1997.
  104. Thompson S., and H. E. Spence, Multi-point Analysis of High-Latitude Dayside Auroral Particle Precipitation: A Case Study of "Staircase" Signatures, presented at the 1997 IAGA meeting, Upsalla, Sweden, August 1997.
  105. Looper, M. D., J. B. Blake, and H. E. Spence, Observations of the Response of Radiation-Belt Protons to the January 1997 Magnetic Cloud Event, presented at the 1997 IAGA meeting, Upsalla, Sweden, August 1997.
  106. Jorgensen, A. M.,  H. E. Spence, M. G. Henderson, and G. D. Reeves, Diagnosing the state of the magnetosphere using energetic neutral atom (ena) measurements from the POLAR/CEPPAD experiment, presented at the 1997 IAGA meeting, Upsalla, Sweden, August 1997.
  107. Reeves, G. D., M. G. Henderson, R. D. Belian, A. M.  Jorgensen, H. E. Spence, and J. B. Blake, Global observations of the substorm injection region using energetic neutral atom imaging from Polar, presented at the 1997 IAGA meeting, Upsalla, Sweden, August 1997.
  108. Spence, H. E., New insights on inner magnetosphere ion dynamics from ISTP observations, presented at the 1997 IAGA meeting, Upsalla, Sweden, August 1997.
  109. Sheldon, R. B.,  H. E. Spence, T. A. Fritz, J. D. Sullivan, and W. Spjeldvik, The bimodal response of the earth’s magnetosphere to coronal mass ejection (CME) events: a new magnetic storm classification, presented at the 1997 IAGA meeting, Upsalla, Sweden, August 1997.
  110. Hughes, W. J., D. L. Murr, H. E. Spence, C. T. Russell, R. A. Greenwald, and M. J. Engebretson, Ground-satellite correlations of transient flows in the magnetospheric cusp: POLAR SuperDARN, and MAACS, presented at the 1997 IAGA meeting, Upsalla, Sweden, August 1997.
  111. Chen, J., T. A. Fritz, R. B. Sheldon, H. E. Spence, W. N. Spjeldvik, J. F. Fennell, and S. Livi, Cusp energetic particle events measured by POLAR spacecraft, presented at the 1997 IAGA meeting, Upsalla, Sweden, August 1997.
  112. Reeves, G. D. , M. G. Henderson, R. D. Belian, R. H. W. Friedel, T. E. Cayton, M. M. Meier, D. N. Baker, X. Li,  J. B. Blake, J. F. Fennell, R. Selesnick, T. G. Onsager, and H. E. Spence, Relativistic electron response to the January 1997 magnetic cloud: coordinated observations from 12 satellites, presented at the 1997 IAGA meeting, Upsalla, Sweden, August 1997.
  113. Kawano, H., G. Le, X.-W. Zhou, C. T. Russell, H. E. Spence, S. Kokobun, T. Mukai, T. Yamamoto, and Y. Saito, Substorm influences in the polar magnetosphere: initial POLAR MFE observations, presented at the 1997 Fall SGEPSS meeting, Japan,  August 1997.
  114. Sheldon, R. B.,  H. E. Spence, T. A. Fritz, and S. Livi, Observations of POLAR Particle Injections: The Distinction Between Storms and Substorms, EOS Trans. AGU, 78, 1997, presented at the 1997 Fall AGU meeting, San Fransisco, CA, Dec 1997.
  115. Looper, M. D.,  J. B. Blake, and H. E. Spence, Obserservations of Energetic Protons Injected by the January 1997 Magnetic Cloud Event, EOS Trans. AGU, 78, 1997, presented at the 1997 Fall AGU meeting, San Fransisco, CA, Dec 1997.
  116. Chen, J., T. A. Fritz, R. B. Sheldon, and H. E. Spence, The High Altitude Dayside Cusp: A New Trapping and Acceleration Region of the Magnetosphere, EOS Trans. AGU, 78, 1997, presented at the 1997 Fall AGU meeting, San Fransisco, CA, Dec 1997.
  117. Jorgensen, A. M., H. E. Spence, M. G. Henderson, and G. D. Reeves, Energetic Neutral Atom (ENA) Bursts Measured by POLAR and Their Relationship to Magnetospheric Substorms, EOS Trans. AGU, 78, 1997, presented at the 1997 Fall AGU meeting, San Fransisco, CA, Dec 1997.
  118. Richard, R. L., R. J. Walker, H. E. Spence, M. Ashour-Abdalla, J. F. Fennell, and J. B. Blake, Heavy Ion Dynamics and PEP's, EOS Trans. AGU, 78, 1997, presented at the 1997 Fall AGU meeting, San Fransisco, CA, Dec 1997.
  119. Pulkkinen, T. I., D. N. Baker, W. K. Peterson, J. L. Roeder, G. Kettmann, T. A. Fritz, H. E. Spence, E. G. Shelley, O. W. Lennartsson, and H. L. Collin, POLAR Magnetospheric Ion Spectra During Magnetic Cloud Events: CAMMICE, TIMAS, and CEPPAD Comparisons, EOS Trans. AGU, 78, 1997, presented at the 1997 Fall AGU meeting, San Fransisco, CA, Dec 1997.
  120. Takahashi, K., S. Ohtani, D. G. Sibeck, H. E. Spence, and J. F. Fennell, CCE and SCATHA Observations of Energetic Ions During the 1200 UT Substorm on August 28, 1986, EOS Trans. AGU, 78, 1997, presented at the 1997 Fall AGU meeting, San Fransisco, CA, Dec 1997.
  121. Henderson, M., G. Reeves, H. Spence, A. Jorgensen, J. Fennell, J. Roeder, and J. Blake, Extracting Global Energetic Ion Distributions From Polar CEPPAD/IPS Energetic Neutral Atom Images, EOS Trans. AGU, 78, 1997, presented at the 1997 Fall AGU meeting, San Fransisco, CA, Dec 1997.
  122. Roeder, J. L., J. F. Fennell, M. G. Henderson, G. D. Reeves, and H. E. Spence, Spatial Distribution of Ring Current Ions: In-Situ Composition Measurements and Energetic Neutral Atom Images, EOS Trans. AGU, 78, 1997, presented at the 1997 Fall AGU meeting, San Fransisco, CA, Dec 1997.
  123. Reeves, G. D., R. D. Belian, T. E. Cayton, R. H. W. Friedel, M. G. Henderson, D. N. Baker, and H. E. Spence, Energetic Particle Contributions to a Magnetospheric Constellation Mission, EOS Trans. AGU, 78, 1997, presented at the 1997 Fall AGU meeting, San Fransisco, CA, Dec 1997.
  124. Fishbaugh, K. E., and H. E. Spence, On the Possible IMF Control of Polar Energetic Particles, EOS Trans. AGU, 79, 1998, presented at the 1998 Spring AGU meeting, Boston, MA, May 1998.
  125. Chang, S.-W.., J. D. Scudder, and H. E. Spence, Are CEP’s the High-energy Extension of Hydra Spectrum?, EOS Trans. AGU, 79, 1998, presented at the 1998 Spring AGU meeting, Boston, MA, May 1998.
  126. Boudouridis, A., ., and H. E. Spence, Separation of Spatial and Temporal Structure of Particle Precipitation in Low Altitude Aurora, EOS Trans. AGU, 79, 1998, presented at the 1998 Spring AGU meeting, Boston, MA, May 1998.
  127. Hirsch, K. L.,  A. A. Eccles, H. E. Spence, S. P. Christon,  E. C. Roelof, and T. E. Eastman, Two point mapping of auroral field lines using magnetic conjunctions of two ISTP spacecraft, EOS Trans. AGU, 79, 1998, presented at the 1998 Spring AGU meeting, Boston, MA, May 1998.
  128. Bayliss, S..,  D. L. Matthews, S. Oetting, S. Chan, C. Sullivan, J. Simmerer, M. Alothman, J. Bhattacharjya, M. Smara, T. A. Fritz, H. E. Spence, and A. A. Eccles, Student Participation in Satellite Dataset Recovery and Analysis, EOS Trans. AGU, 79, 1998, presented at the 1998 Spring AGU meeting, Boston, MA, May 1998.
  129. Harris, J., R. B. Sheldon, and H. E. Spence, Correlation of POLAR Energetic Particle Data with Geosynchronous and Ground-Based Indices Using Web-based Tools, EOS Trans. AGU, 79, 1998, presented at the 1998 Spring AGU meeting, Boston, MA, May 1998.
  130. Henderson, M. G., G. D. Reeves, R. W. Friedel, S. Boudarie, H. E. Spence, A. M. Jorgensen, J. F. Fennell, J. Roeder, and J. B. Blake, Energetic Neutral Atom Images Derived from the 4D SALAAMBO Convection-Diffusion Code: Comparison with POLAR CEPPAD/IPS ENA Images, EOS Trans. AGU, 79, 1998, presented at the 1998 Spring AGU meeting, Boston, MA, May 1998
  131. Rayburn, C., H. Petschek, R. B. Sheldon, and H. E. Spence, The Dynamic Evolution of a Multi-Satellite Constellation, EOS Trans. AGU, 79, 1998, presented at the 1998 Spring AGU meeting, Boston, MA, May 1998.
  132. Baker, D. N., T. I. Pulkkinen, X. Li, H. E. Spence, G. D. Reeves, J. B. Blake, and W. K. Peterson, Substorm Particle and Field Changes During Geomagnetic Storms: Cause and Effect Relationships, , EOS Trans. AGU, 79, 1998, presented at the 1998 Spring AGU meeting, Boston, MA, May 1998.
  133. Boudouridis, A.,  and H. E. Spence, Separation of Spatial and Temporal Structure of Particle Precipitation in Low Altitude Aurora, presented at the 1998 NSF GEM summer workshop, Snowmass, CO, June 1998.
  134. Jorgensen, A. M., H. E. Spence, M. G. Henderson, and G. D. Reeves, Energetic Neutral Atom (ENA) Bursts and Their Relation to Magnetospheric Substorms, presented at the 1998 NSF GEM summer workshop, Snowmass, CO, June 1998.
  135. Jorgensen, A. M., H. E. Spence, W. J. Hughes, J. F. Fennell, and J. L. Roeder, The Global Structure of the Ring Current,presented at the  1998 NSF GEM summer workshop, Snowmass, CO, June 1998.
  136. Hirsch, K. L.,  A. A. Eccles, H. E. Spence, S. P. Christon,  E. C. Roelof, and T. E. Eastman,  Two point mapping of auroral field lines using magnetic conjunctions of two ISTP spacecraft, EOS Trans. AGU, 79, 1998, presented at the 1998 NSF GEM summer workshop, Snowmass, CO, June 1998.
  137. Spence, H. E. , D. N. Baker, J. B. Blake, J. F. Fennell, T. A. Fritz, M. G. Henderson, A. M. Jorgenson, G. D. Reeves, J. L. Roeder, R. B. Sheldon, and J. D. Sullivan, Quantifying energetic particle transport in the inner magnetosphere through global ena imaging, COSPAR, Nagoya, Japan, 12-19 July, 1998.
  138. Jorgensen, A. M., W. J. Hughes, H. E. Spence, H. J. Singer, J. F. Fennell, and J. L. Roeder, Closure of the ring current: azimuthal, radial and field aligned currents, presented at the Fall 1998 American Geophysical Union Meeting, San Fransisco, CA, December, 1998.
  139. Hirsch, K. L., and H. E. Spence, Does steady convection accurately describe the plasma in the quiescent plasma sheet: a mid-altitude highly inclined spacecraft survey of plasma number density and pressures in the plasma sheet, presented at the Fall 1998 American Geophysical Union Meeting, San Fransisco, CA, December, 1998.
  140. Boudouridis, A., and H. E. Spence, Applications of continuous wavelet transforms to the separation of spatial and temporal structure of auroral particle precipitation,  presented at the Fall 1998 American Geophysical Union Meeting, San Fransisco, CA, December, 1998.
  141. Reeves, G. D. , M. G. Henderson, A. Jorgensen, and H. E. Spence, Global Energetic Neutral Atom Images and Global Magnetospheric Models, AGU Fall Meeting, San Francisco, CA, 6-10 December, 1998.
  142. Chen, J., T. A. Fritz, and H. E. Spence, Observations of the CEP events during the May 1998 geomagnetic storm period, presented at the AGU Fall Meeting, San Francisco, CA, 6-10 December, 1998.
  143. Green, J. C., M. G. Kivelson, R. J. Walker, K. K. Khurana, H. E. Spence, and J. B. Blake, The polar cap boundary for northward IMF, presented at the AGU Fall Meeting, San Francisco, CA, 6-10 December, 1998.
  144. Chang, S. W., J. D. Scudder, S. Fuselier, J. F. Fennell, K. Trattner, J. Pickett, H. E. Spence, J. Menietti, W. Peterson, R. P. Lepping, and R. Friedel, Cusp energetic ions: a bow shock source, presented at the AGU Fall Meeting, San Francisco, CA, 6-10 December, 1998.
  145. Reeves, G. D. , M. G. Henderson, A. M. Jorgensen, H. E. Spence, and J. F. Fennell, Investigating the Ring Current Through Neutral Atom Imaging, AGU Chapman Conference on Magnetospheric Current Systems, Kona, Hawaii, January 11-15, 1999.
  146. Roeder, J. L. , J. F. Fennel, H. E. Spence, T. A. Fritz, M. Grande, M. Carter, and S. Livi, Polar Observations of the Energetic Component to Stormtime Ring Current Ion Composition, Paper SM21D-06 EOS, Boston, MA, 1999 Spring AGU Meeting supplement, S274, 1999.
  147. Boudouridis, A., and H. E. Spence, Investigation of the Newell-Meng criteria for region identification using two-point satellite measurements, presented at the AGU Spring Meeting, Boston, MA, 1-4 June 1999.
  148. Chen, J. , T.A. Fritz, H.E. Spence, D.L. Matthews, and J.D. Sullivan, May 4, 1998 Storm: Multiple Spacecraft Observations, Paper SM31D-08 EOS, 1999 Spring AGU Meeting supplement, S283, 1999.
  149. Chang, S. W. , J. D. Scudder, J. F. Fennell, R. Friedel, C. T. Russell, R. P. Lepping, and H. E. Spence, Observations of Energetic Ions in the Magnetosheath on May 4, 1998, Paper SM31D-09 EOS, 1999 Spring AGU Meeting supplement, S283, 1999.
  150. Sheldon, R. B., and H.  E. Spence, Composition and the acceleration processes of magnetic storms, presented at the AGU Spring Meeting, Boston, MA, 1-4 June 1999.
  151. Hirsch, K. L., A mid-altitude highly-inclined spacecraft survey of plasma number densities and pressures in the plasma sheet, presented at the AGU Spring Meeting, Boston, MA, 1-4 June 1999.
  152. Harris J., R. Sheldon , and H. Spence, Correlation of POLAR Energetic Particle Data with Geosynchronous and Ground-Based Indices using Web-based Tools., AGU Spring Meeting, Boston, MA, June 1-4, 1999.
  153. Spence, H. E., ENA lessons learned from POLAR, presented at the IMAGE Science Team Meeting, Aug, 1999.
  154. Boudouridis, A., H. E. Spence, T. G. Onsager, Investigation of the pulsed reconnection model using two co-located, low-altitude satellites, presented at the AGU Fall Meeting, San Francisco, CA, Dec. 13-17, 1999
  155. Jorgensen, A. M. , M. G. Henderson, E. C. Roelof, G. D. Reeves, and H. E. Spence, The contribution of Energetic Neutral Atoms (ENAs) to the decay of the ring current, presented at the AGU Fall Meeting, San Francisco, CA, Dec. 13-17, 1999.

    156.  

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Colloquia and Seminars (15 as of October 1999):
  1. Spence, H. E., Particle Detectors for the ISTP/GGS Project, seminar given at the Space Physics Seminar, Department of Earth and Space Sciences, University of California, Los Angeles, Westwood, CA, 18 May 1990.
  2. Spence, H. E., A Model of Plasmasheet Convection in the Terrestrial Magnetosphere, seminar given at the Space Sciences Laboratory Seminar, University of California, Berkeley, Berkeley, CA, 18 September 1990.
  3. Spence, H. E., Multiple-Satellite Measurements of Auroral Processes, seminar given at the Boston University Center for Space Physics Seminar, Boston, MA, 21 November 1991.
  4. Spence, H. E., The POLAR/CEPPAD Experiment, seminar given at the Space Physics Seminar, Department of Earth and Space Sciences, University of California, Los Angeles, Westwood, CA, 21 January 1994.
  5. Spence, H. E., The Magnetosphere From Pole to Pole or A Day in the Life of POLAR, seminar given at the Boston University Center for Space Physics Seminar, Boston, MA, 28 March 1996.
  6. Spence, H. E., First Results from the Energetic Particle Sensors on the NASA/POLAR Satellite, seminar given at the University of New Hampshire Deparment of Earth, Ocean, and Space, Durham, NH, 26 April 1996.
  7. Spence, H. E., Magnetospheric Energetic Particles and the Sun-Earth Connection: New Insights in the ISTP Era, seminar given at the Deparment of Physics, Dartmouth College, Hanover, NH, 5 November 1996.
  8. Spence, H. E., Fresh Insights on “Old” Magnetospheric Physics:: New Results >From the ISTP Program, seminar given at the Boston University Center for Space Physics Seminar, Boston, MA, 15 November 1996.
  9. Spence, H. E., Global plasma physical dynamics from the NASA GGS mission, colloquium given at the Princeton Plasma Physics Laboratory Space Plasma Seminar, Princeton, NJ, 9 April 1997.
  10. Spence, H. E., The Magnetospheric Substorm Injection Revealed: New Insights from POLAR ENA Imaging, seminar given at the Plasma Physics Seminar, Dartmouth College, 13 January  1998.
  11. Spence, H. E., Imaging Substorm Injections Using Global ENA Images and Simultaneous Multipoint Observations, colloquium given at the Physics Department Colloquium, United States Air Force Academy, Colorado Springs, CO, 17 February 1998.
  12. Spence, H. E., Space Weather: Connecting Gusty Solar Winds, Geomagnetic Storms and Substorms, and Auroral Particle Precipitation, seminar presented to the Amateur Telescope Makers of Boston, Harvard-Smithsonian Center for Astrophysics, Cambridge MA, 10 Dec 1998.
  13. Spence, H. E.,  C. O’Canna, S. Chakrabarti, and W. J. Hughes, Public outreach, curriculum development, and educational reform: a multifaceted perspective, presented at the Space Science Institute K-12 Education Workshop, Boulder, CO, April 11-14, 1999
  14. Spence, H. E., The future of construction in space or new "stars" on the horizon, seminar presented to the Colorado Springs Chapter of the National Association of Women in Construction, Colorado Springs, CO, 17 June 1999.
  15. Spence, H. E., For now we see through silicon, darkly:  the emerging art of magnetospheric energetic neutral atom imaging, presented at the "Kivelson Symposium", UCLA, Westwood, CA, 16 September 1999.

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