Invited Talks

• Elkington, S.R., S.G. Claudepierre, and J.P. McCollough, Simulation techniques in modeling Earth's trapped radiation environment.  Presented at the 5th International Conference on Numerical Modeling of Space Plasma Flows (ASTRONUM 2010), San Diego, California, June 2010.
• Elkington, S.R., Global magnetospheric simulations of geomagnetic wave activity.   Presented at the RBSP/EFW Team Meeting, Minneapolis, Minnesota, May 2010.
• Elkington, S.R., Energetic Particles Trapped in Space: Understanding Earth's Van Allen Radiation Belts.   Seminar presented for the 2009-2010 LASP Public Lecture Series, Boulder, Colorado, March 2010.
• Elkington, S.R., and J.P. McCollough, Earth's radiation belts and magnetospheric Pc1-Pc5 ULF wave generation during HSSW events.  Presented at the High Speed Solar Wind Streams and Geospace Interactions (HSS-GI) Workshop, University of Cumbria, Ambleside, U.K., September 2009.
• Elkington, S.R., Physical models of the near-Earth space radiation environment.  Seminar presented at the Institute of Geophysics and Planetary Physics (IGPP), University of California, Los Angeles, February 2009.
• Elkington, S.R., S.G. Claudepierre, C.-L. Huang, A. Unsal, and M. Wiltberger, Characterizing magnetospheric ULF activity during storms driven by high speed solar wind.  Presented at the 37th COSPAR Scientific Assembly, Montreal, Quebec, July 2008.
• Elkington, S.R., S.G. Claudepierre, and M. Wiltberger, Energetic particle transport in the inner magnetosphere: Main phase access of plasmasheet electrons to the radiation belts.  Presented at the 15th Cluster Science Workshop, Puerto Santiago, Tenerife, Spain, March 2008.
• Elkington, S.R., S.G. Claudepierre, C.-L. Huang, and A.A. Chan, Magnetospheric ULF activity as a function of solar wind conditions: implications for particle energization in the radiation belts.  Presented at the 2008 URSI meeting, Boulder, Colorado, January.
• Elkington, S.R., Physical models of the near-Earth space radiation environment.  Seminar presented at the NOAA Space Weather Prediction Center, Boulder, CO, November 2007.
• Elkington, S.R., S.G. Claudepierre, and M. Wiltberger, Particle thermalization in geospace: Solar wind/magnetosphere coupling through externally-driven ULF waves.  Presented at the NASA Living With a Star Science Workshop, Boulder, CO, September 2007.
• Elkington, S.R., A.A. Chan, B. Yu, and M. Wiltberger, Coupling between the plasmasheet and radiation belts: energetic particle transport in the inner magnetosphere.  Presented at the Fourth Annual AOGS Meeting, Bangkok, Thailand, August 2007.
• Elkington, S.R., S.G. Cludepierre, S. Kanekal, A.A. Chan, and M. Wiltberger, Characterizing ULF wave activity driven by high speed solar wind events.  Presented at IUGG/IAGA 2007, Perugia, Italy, July.
• Elkington, S.R., B. Yu, A.A. Chan, and M. Wiltberger, Flux variations in the radiation belts and the influence of coupling at the outer boundary.  Presented at the EGU General Assembly, Vienna, Austria, April 2007.
• Elkington, S.R., S.G. Claudepierre, and M. Wiltberger, Physical models of Earth's space radiation environment.  Departmental colloquium presented to the University of Colorado Department of Applied Mathematics, Boulder, February 2007.
• Elkington, S.R., D.N. Baker, B. Yu, A.A. Chan, M. Wiltberger, and A. Aasnes, Injection of plasmasheet electrons into the radiation belts.  Presented at the 2006 Western Pacific Geophysics Meeting, Beijing, China, July.
• Elkington, S.R., D.N. Baker, and M. Wiltberger, Substorm injection of energetic ions and electrons in the inner magnetosphere: MHD/particle simulations.  Presented at the 8th International Conference on Substorms, Banff, Canada, March 2006.
• Elkington, S.R., S.G. Claudepierre, and M. Wiltberger, Radiation belt dynamics driven by interaction with ULF waves.  Presented at the Workshop on Global Aspects of Magnetosphere/Ionosphere Coupling, Yosemite, CA, February 2006.
• Elkington, S.R., The Sun, the solar wind, and Earth's trapped particle environment.  General seminar presented at Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, November 2005.
• Elkington, S.R., Space weather and the dynamics of the Earth's radiation belts.  Presented at the 2005 NCAR/ASP/HAO Summer Colloquium on Space Weather, Boulder, Colorado, June.
• Elkington, S.R., A.A. Chan, Y. Fei, and M. Wiltberger, ULF waves and radial diffusion in the radiation belts.  Presented at the Chapman Conference on ULF Waves, San Diego, CA, March 2005.
• Elkington, S.R., Radial transport in the radiation belts.  Tutorial presented at the Workshop on Energetic Electron Radiation Belt Dynamics, Hermanus Magnetic Observatory, Hermanus, South Africa, March 2005.
• Elkington, S.R., A.A. Chan, Y. Fei, M. Wiltberger, Radiation belt energization via interaction with ULF waves: MHD simulations of ULF activity.  Presented at the 2005 URSI meeting, Boulder, Colorado, January.
• Elkington, S.R., M.J. Wiltberger, A.A. Chan, and Y. Fei, Energy transfer from the solar wind to the outer zone radiation belts via ULF waves.  Presented at "Sun-Earth Connection Physics: The GeoImpact of CMEs, CIRs, and Ordinary Solar Wind", Merida, Mexico, November 2004.
• Elkington, S.R., D.N. Baker, M. Wiltberger, Y. Fei, and A.A. Chan, Physical models of the radiation belts: techniques, challenges, and unknowns.  Presented at Huntsville Modeling Workshop "Challenges to Modeling the Sun-Earth System", Alabama, October 2004.
• Elkington, S.R., What we need in a GGCM to describe the radiation belts.  Presented at the GEM Summer Meeting, Snowmass, Colorado, June 2004.
• Elkington, S.R., Energetic particle transport in the magnetosphere, waves, and the plasmasphere.  Seminar presented to HAO/NCAR Plasmaspheric Research Group, October 2003.
• Elkington, S.R., D.N. Baker, M. Wiltberger, A.A. Chan, Y. Fei, Coupling energy from the solar wind into the outer zone through ULF variations.  Presented at IUGG/IAGA 2003, Sapporo, Japan, July.
• Elkington, S.R., D.N. Baker, A.A. Chan, Y. Fei, M. Wiltberger, Radial transport in the outer zone: ULF waves and the diffusion equation.  Presented at IUGG/IAGA 2003, Sapporo, Japan, July.
• Elkington, S.R., Transport in the radiation belts and the role of magnetospheric ULF waves.  Plenary tutorial presented at the GEM Summer Meeting, Snowmass, Colorado, June 2003.
• Elkington, S.R., Modeling transport and acceleration of energetic electrons in the outer zone radiation belt.  Seminar presented to the Space Physics Division, Los Alamos National Laboratory, February 2003.
• Elkington, S.R., D.N. Baker, A.A. Chan, Y. Fei, M.K. Hudson, and T.G. Onsager, ULF waves and energetic electron dynamics in the outer zone. Presented at the AGU 2002 Fall Meeting, San Fransisco, CA, December.
• Elkington, S.R., D.N. Baker, A.A. Chan, Y. Fei, M.K. Hudson, and M. Wiltberger,  Synergistic development of physical radiation belt models.  Presented to NASA "Living With A Star" Science Workshop, Johns Hopkins/Applied Physics Laboratory, Columbia, MD, November 2002.
• Elkington, S.R.,  D.N. Baker, A.A. Chan, Y. Fei, M.K. Hudson, and M. Wiltberger, The plasma sheet as a source of outer zone electrons: physical space weather models and lessons learned from ISTP.  Presented at the 2002 Western Pacific Geophysics Meeting, Wellington, New Zealand, July.
• Elkington, S.R., MHD/particle simulations of the near-Earth magnetotail. Seminar presented to the Department of Physics and Astronomy, Dartmouth College, Hanover, NH, April 2002.
• Elkington, S.R., Particle simulations of the radiation belts.  Seminar presented to the Department of Physics and Astronomy, Rice University, November 2001.
• Elkington, S.R., A.A. Chan, and M.K. Hudson, I.R. Mann, Radial diffusion in a non-axisymmetric magnetic field:  towards a generalized theory of radial diffusion.  Presented at the ISEC 2001 Conference on Radiation Belt Science and Technology, Queenstown, New Zealand, July 2001.
• Elkington, S.R., Earth's trapped radiation environment:  Understanding the dynamics of the Van Allen radiation belts.  Colloquium presented to the Department of Physics and Astronomy, Northwestern University, Chicago, January 2001.
• Elkington, S.R., M.K. Hudson, and A.A. Chan, Transport and acceleration of radiation belt electrons through resonant interaction with magnetospheric ULF oscillations.  Presented at the First S-RAMP Conference, Sapporo, Japan, Oct 2000.
• Elkington, S.R., M.K. Hudson, J.G. Lyon, and A.A. Chan, Modeling radiation belt injection and acceleration processes.  Presented at the NATO Advanced Study Institute on Space Storms and Space Weather Hazards, Crete, Greece, June 2000.
• Elkington, S.R., Using MHD/Particle simulations to predict radiation belt dynamics during geomagnetic storms.  Seminar presented at NOAA/SEC, Boulder, CO, January 2000.
• Elkington, S.R., M.K. Hudson, and J.G. Lyon, Energetic electrons and the January 1997 magnetic storm:  simulations vs. observations.  Presented to the 6th Huntsville Modeling Workshop, Guntersville, AL, October 1998.

Contributed Talks

• Elkington, S.R., RBSP/EFW: global MHD simulations of substorm activity.  Telephone seminar presented for the RBSP/EFW Science Working Group from Boulder, Colorado, April 2010.
• Elkington, S.R., Sources or Losses? The cause and effect of low-frequency magnetospheric pulsations in the Van Allen radiation belts.  Seminar presented at the Laboratory for Atmospheric and Space Physics, Boulder, Colorado, March 2010.
• Elkington, S.R., Simulations of the evolving phase space density at RBSP.  Presented at the RBSP-ECT Science Working Group Team Meeting, Los Alamos National Laboratory, New Mexico, February 2010.
• Elkington, S.R., S.G. Claudepierre, C.-L. Huang, and M. Wiltberger, Magnetospheric ULF wave power as a function of solar wind variations.  Presented at the 2009 Fall AGU Meeting, San Francisco, California, December.
• Elkington, S.R. and Y.Y. Shprits, Physical models of the radiation belts: a proposal for a new GEM focus group in the Inner Magnetosphere/Storms Focus Area.  Presented at the 2009 GEM Mini-Workshop, San Francisco, California, December.
• Elkington, S.R., Global models as a predictive tool in RBSP.  Presented at the RBSP-ECT Science Working Group Team Meeting, Redondo, California, February 2009.
• Elkington, S.R., S.G. Claudepierre, and M. Wiltberger, Effect of externally-driven magnetospheric ULF variations on the radiation belts.  Presented at the 2008 Fall AGU Meeting, San Francisco, California, December.
• Elkington, S.R., How well does radial diffusion describe transport in the radiation belts?  Seminar presented to LASP Magnetospheric Physics Group, September 2008.
• Elkington, S.R., T. Sarris, W. Yue, X. Li, R. Rankin, K. Kabin, and A. Degeling, Polarization characteristics of ULF waves: covariant calculations vs. THEMIS observations.  Presented at the 2008 Inner Magnetospheric Coupling Workshop, Espoo, Finland, July.
• Elkington, S.R., A.A. Chan, B. Yu, and M. Wiltberger, Plasmasheet injections during geomagnetic storms.  Presented at the 2008 Inner Magnetospheric Coupling Workshop, Espoo, Finland, July.
• Elkington, S.R., S.G. Claudepierre, C.-L. Huang, A. Unsal, and M. Wiltberger, Solar wind driving of magnetospheric ULF waves: cavity modes?  Presented at the 2008 Inner Magnetospheric Coupling Workshop, Espoo, Finland, July.
• Elkington, S.R., S.G. Claudepierre, C.-L. Huang, and A.A. Chan, Magnetospheric ULF activity as a function of solar wind conditions: toward a quantitative model of radial diffusion .  Presented at the 2007 Fall AGU Meeting, San Francisco, CA, December.
• Elkington, S.R., Does the CISM radiation belt model need to include an internal source?  Presented at the 2007 CISM All Hands Meeting, Boston, MA, September.
• Elkington, S.R., B. Yu, A.A. Chan, and M. Wiltberger, Stormtime plasmasheet access to the inner magnetosphere: evidence for an internal source.  Presented at the 2007 Rarotonga Energetic Particle Workshop, Rarotonga, Cook Islands, August.
• Elkington, S.R., A.A. Chan, and B. Yu, Boundary conditions and fluxes in the outer radiation belts: Particle injections from the plasmasheet.  Presented at the 2006 Fall AGU Meeting, San Francisco, CA, December.
• Elkington, S.R., Physical radiation belt models,  Presented at the 2006 CISM All Hands Meeting, Boston, MA, September.
• Elkington, S.R. and M. Wiltberger, Plasmasheet dynamics and loss of particles from the radiation belts via radial diffusion.  Presented at the GEM 2006 Summer Meeting, Snowmass, CO, June.
• Elkington, S.R., What we need to know to understand radial diffusion in the Earth's magnetosphere.  Seminar presented to LASP Magnetospheric Physics Group, March 2006.
• Elkington, S.R., M. Wiltberger, D.N. Baker, and R.H.W. Friedel, Convective injection of radiation belt electrons: a comparison of two storms.  Presented at the 2005 Fall AGU Meeting, San Francisco, CA, December.
• Elkington, S.R., D.N. Baker, and M. Wiltberger, Boundary conditions on the radial diffusion problem, and diffusion as a loss process.  Presented at the GEM 2005 Summer Meeting, Santa Fe, NM, June.
• Elkington, S.R., Transport in the radiation belts and global circulation models.  Presented at the GEM 2005 Summer Meeting, Santa Fe, NM, June.
• Elkington, S.R., M. Wiltberger, A.A. Chan, and Y. Fei, Investigating the origin and characteristics of ULF waves driven by the solar wind.  Presented at the 2004 Fall AGU Meeting, San Francisco, CA, December.
• Elkington, S.R., 2d and 3d electron radiation belt modules,  Presented at the 2004 CISM All Hands Meeting, Boston, MA, September.
• Elkington, S.R., A.A. Chan, and Y. Fei, Wave propagation, local time effects and implications for particle energization.  Presented at the First Annual AOGS Meeting, Singapore, July 2004.
• Elkington, S.R., Wave propagation, local time effects, and particle energization.  Presented at the GEM 2004 Summer Meeting, Snowmass, Colorado, June.
  
• Elkington, S.R., M. Wiltberger, and D.N. Baker, Analysis of a substorm particle injection:  0630 UT, March 31, 2001.  Presented at the 2004 Spring AGU Meeting, Montreal, Canada, May.
• Elkington, S.R., Simulating impulsive injections in the radiation belts.  Seminar presented to LASP Magnetospheric Physics Group, February 2004.
• Elkington, S.R., A.A. Chan, Y. Fei, M. Wiltberger, The global ULF environment on 09/24/98, and effect on energetic electron dynamics.  Presented at the 2003 Fall AGU Meeting, San Francisco, CA, December.
• Elkington, S.R., Simulations of the radiation belts.  Presented at the CISM All Hands Meeting, Boston, MA, September 2003.
• Elkington, S.R., A.A. Chan, Y. Fei, M. Wiltberger, Mode structure of ULF waves in the magnetosphere and implications for energetic particle acceleration.  Presented at ISEC 2003, Toulouse, France, August.
• Elkington, S.R., D.N. Baker, M. Wiltberger, 31 March 2001 0630 substorm: injection of energetic ions and electrons.  Presented at the Chapman Conference on Physics and Modeling of the Inner Magnetosphere, Helsinki, Finland, August 2003.
• Elkington, S.R., A.A. Chan, Y. Fei, ULF mode structure in the magnetosphere: MHD.  Presented at the GEM Summer Meeting, Snowmass, Colorado, June 2003.
• Elkington, S.R., Cluster and global simulations of the magnetosphere.  Presented at the Cluster Science Working Team Meeting, Boulder, Colorado, February 2003.
• Elkington, S. R., D. N. Baker, M. J. Wiltberger, and M. K. Hudson,  Storm-time trapping of energetic plasma sheet electrons.  Presented at GEM 2002, Telluride, CO.
• Elkington, S. R., A. A. Chan, and Y. Fei, Characteristics of radial diffusion in the outer zone.  Presented at GEM 2002, Telluride, CO.
• Elkington, S. R., MHD/particle simulations of the magnetotail.  Seminar presented to LASP Magnetospheric Physics Group, March 2002.
• Elkington, S. R., D. N. Baker, X. Li, M. K.  Hudson, and M. J. Wiltberger, Storm-time injection and trapping of plasma sheet particles in the outer zone:  March 31, 2001.  Presented at the 2001 Fall AGU Meeting, San Francisco, CA, December.
• Elkington, S. R., MHD simulations of the Earth's magnetosphere.  Seminar presented to LASP Magnetospheric Physics Group, October, 2001.
• Elkington, S. R., A. A. Chan, and M. K. Hudson, Enhanced radial diffusion of energetic electrons in a compressed magnetic field.  Presented at the 2001 GEM meeting, Snowmass, CO, June 2001. 
• Elkington, S. R., M. K. Hudson, and A. A. Chan, Enhanced radial diffusion of outer zone electrons in an asymmetric geomagnetic field.  Presented at the Spring AGU meeting, Boston, MA, May 2001. 
• Elkington, S. R., P. Buehler, D. F. Moorer, D. N. Baker, M. K. Hudson, M.J. Wiltberger, J. F. Fennell, Data assimilation in initializing MHD/particle simulations of the radiation belts.  Pesented at the AGU 2000 Fall Meeting, San Fransisco, CA, Dec 2000.
• Elkington, S. R., M. K. Hudson, J. B. Blake, and A. A. Chan, Energetic electron response during the geomagnetic storm of September 24-26, 1998.  Presented at the First S-RAMP Conference, Sapporo, Japan, Oct 2000.
• Elkington, S. R., M. K. Hudson, and A. A. Chan, Resonant diffusion of outer zone electrons.  Presented at the NATO Advanced Study Institute on Space Storms and Space Weather Hazards, Crete, Greece, June 2000.
• Elkington, S. R., M. K. Hudson, and A. A. Chan, Enhanced radial diffusion of outer zone electrons through resonant interaction with magnetospheric ULF waves.  Presented at the AGU 2000 Spring Meeting, Washington, D. C., May 2000.
• Elkington, S. R., M. K. Hudson, and A. A. Chan, Resonant diffusion of radiation belt particles in the ULF frequency continuum.  Presented at the AGU 1999 Fall Meeting, San Francisco, CA, December 1999.
• Elkington, S. R., M. K. Hudson, and A. A. Chan, Acceleration and radial transport of relativistic electrons via global Pc-5 ULF waves.  Presented at IUGG-99, Birmingham, UK, July 1999.
• Elkington, S. R., M. K. Hudson, and A. A. Chan, Resonant acceleration of magnetospheric electrons via Pc-5 ULF oscillations.  Presented at the AGU 1999 Spring Meeting, Boston, MA, June 1999.
• Elkington, S. R., M. K. Hudson, and J. G. Lyon, Simulating energetic electron acceleration during the January 10, 1997 magnetic storm:  the role of magnetospheric ULF oscillations.  Presented at the ISTP Science Workshop, NASA/Goddard Space Flight Center, April 1998.
• Elkington, S. R., M. K. Hudson, and J. G. Lyon, Storm-time convection of plasma sheet electrons into the outer radiation belt.  Presented at the AGU1998 Fall Meeting, San Francisco, CA, December 1998.
• Elkington, S. R., M. K. Hudson, J. G. Lyon, Global simulations of the radiation belt response to the magnetic storm of January 10-11, 1997. Presented at the GEM/ISTP Conference, Yosemite, CA, February 1998.
• Elkington, S. R., M. K. Hudson, J. G. Lyon, Acceleration of relativistic electrons during storm sudden commencement.  Presented at the 1997 GEM Conference, Snowmass, CO, June 1997.

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