Laboratory for Extraterrestrial Physics
Sun-Earth Connections Seminar
(aka Brown Bag Seminar)

About the Seminar

The Laboratory for Extraterrestrial Physics (LEP) at NASA's Goddard Space Flight Center conducts weekly science seminars. They are held on Fridays at noon in the Conference Room (Room 8) in Building 2 at Goddard. The topics cover the interests of the Laboratory, including astrochemistry, interplanetary physics, planetary systems, planetary magnetospheres, and electrodynamics. Since the seminar is conducted during the lunch hour, the audience often brings their lunch, hence the moniker "brown bag seminar."

Have an Idea for a Speaker?

The seminar organizers are always appreciative of ideas for seminar speakers. Please contact them EARLY to avoid scheduling conflicts. Contact information is located below.


The current schedule for Spring 2003 is:

January 2003

  • 3
  • No Seminar -- Close to New Year
  • 10
  • CANCELLED Dr. Roy Torbert, University of New Hampshire
  • 17
  • Evidence of a secondary stream of neutral fluxes at 1 AU POSTPONED to March 21 (Hoffman Symposium)
  • 24
  • The seed population for energetic ions accelerated at CME-driven interplanetary shocks: Myth versus Reality (Abstract)
    Dr. Mihir Deasi, University of Maryland, College Park (Bio)
  • 31
  • Where Do Geomagnetic Field Lines Go During Great Space Storms ? (Abstract)
    Dr. Nikolai Tsyganenko, USRA/GSFC(Bio)

    February 2003

  • 7
  • 14
  • Neutral Atmospheric Influences from Solar Proton Events (Abstract)
    Dr. Charles H. Jackman, NASA/GSFC (Bio)
  • 21
  • Plasma Waves and Particles Upstream of the Terrestrial Bow Shock: Cluster Perspectives
    Dr. Jonathan Eastwood, Imperial College, London
  • 28
  • Ion Trajectories in Mercury's magnetosphere (Abstract)
    Dr. Menelaos Sarantos, Rice University (Bio)

    March 2003

  • 7
  • CANCELLED Polarization and Fragmentation of Solar Type II Radio Bursts(Abstract)
    Dr. G. Thejappa, University of Maryland, College Park (Bio)
  • 14
  • Inherently 3D Reconnection and its Relation to Magnetotail Dynamics (Abstract)
    Dr. Michael Anthony Shay, University of Maryland, College Park (Bio)
  • 21
  • Evidence of a secondary stream of neutral fluxes at 1 AU (Abstract)
    Dr. Michael Collier, NASA GSFC (Bio)
  • 28
  • The Magnetotail Boundary Layer Under Northward IMF Conditions (Abstract)
    Dr. Don Fairfield, NASA/GSFC (Bio)

    April 2003

  • 04
  • Features of Magnetopause Reconnection (Abstract)
    Dr.Marc Swisdak, University of Maryland, College Park, (Bio)
  • 11
  • No Seminar - AGU/EGS
  • 18
  • Solar Sail Propulsion (SSP) Project (Abstract)
    Dr. Gregory P. Garbe, NASA/MSFC (Bio)
  • 25
  • Hall Electric Fields and Magnetic Reconnection in Thin Current Sheets(Abstract)
    Dr. John C. Dorelli, NASA/GSFC (Bio)

    May 2003

  • 02
  • Evidence for Langmuir Collapse in the Source Regions of Interplanetary Type III Radio Bursts ( Abstract)
    Dr. G. Thejappa, University of Maryland, College Park (Bio )
  • 09
  • Monitoring the yearly sporadic Micrometeor Flux into the upper Atmosphere Using the Arecibo Dual-Beam 430 MHz Radar(Abstract)
    Dr. Diego Janches, Arecibo Observatory and Penn State University (Bio)
  • 16
  • Geometric Considerations of the Evolution of Magnetic Flux Ropes (Abstract)
    Dr. Daniel Berdichevsky (Bio)
  • 23
  • Relativisitc electron dynamics in the Earth's Radiation Belts: SAMPEX and POLAR measurements (Abstract)
    Dr. Shri Kanekal, University of Maryland, College Park (Bio)
  • 30
  • Accurate in situ Electron-Density & Magnetic-Field Values at IMAGE Using RPI (Abstract)
    Dr. Robert F. Benson, NASA/GSFC (Bio)

    Space Physics Meetings

    Year 2002

    Information for Speakers and Visitors

    Speakers interested in speaking at the Brown Bag Seminar are encouraged to contact the organizers, currently Nat Gopalswamy (301-286-5885, and David Sibeck (301 286-5998, The duration of the seminar is typically one hour, with questions asked during and after the seminar. The audience is usually diverse, including scientists with interests ranging throughout the heliosphere (see the Laboratory homepage for a list of interests).

    How to get to Goddard:

    Other Seminar Web Sites

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    Webpage maintained by Nat Gopalswamy (
    Last revised: 23 October 2002