HR: 09:35h
AN: SM21C-07    [Abstracts]
TI: PENGUIn Observations of the THEMIS March 23, 2007 Substorm Event
AU: * Lessard, M
EM: marc.lessard@unh.edu
AF: University of New Hampshire, Space Science Center Morse Hall, Durham, NH 03824, United States
AU: Weatherwax, A T
EM: weatherwax@siena.edu
AF: Siena College, Department of Physics, 515 Loudon Road, Loudonville, NY 12211, United States
AU: Clauer, R
EM: rclauer@umich.edu
AF: Virginia Tech, Department of Electric and Computer Engineering, Blacksburg, VA 24061, United States
AU: Engebretson, M J
EM: engebret@augsburg.edu
AF: Augsburg College, 2211 Riverside Ave, Minneapolis, MN 55454, United States
AU: Frey, H
EM: hfrey@ssl.berkeley.edu
AF: New Jersey Institute of Technology, Center for Solar-Terrestrial Research, Newark, NJ 07102, United States
AU: Inan, U
EM: inan@stanford.edu
AF: Stanford University, STAR Lab, 350 Serra Mall, Stanford, CA 94305-9515, United States
AU: LaBelle, J
EM: jlabelle@aristotle.dartmouth.edu
AF: Dartmouth College, Department of Physics and Astronomy, Hanover, NH 03755, United States
AU: Lanzerotti, L
EM: ljl@njit.edu
AF: University of California, Space Science Laboratory, Berkeley, CA 94720, United States
AU: Mende, S
EM: mende@ssl.berkeley.edu
AF: University of California, Space Science Laboratory, Berkeley, CA 94720, United States
AU: Petit, N
EM: petit@augsburg.edu]
AF: Augsburg College, 2211 Riverside Ave, Minneapolis, MN 55454, United States
AU: Ridley, A
EM: ridley@umich.edu
AF: University of Michigan, Space Physics Research Laboratory, Ann Arbor, MI 48109, United States
AU: Rosenberg, T
EM: tjrosen@umd.edu
AF: University of Maryland, Institute for Physical Science and Technology, College Park, MD 20742, United States
AU: Spasojevic, M
AF: Stanford University, STAR Lab, 350 Serra Mall, Stanford, CA 94305-9515, United States
AU: Detrick, D
EM: detrick@umd.edu
AF: University of Maryland, Institute for Physical Science and Technology, College Park, MD 20742, United States
AB: On March 23, 2007, the THEMIS array of satellites acquired data during an intense substorm, with the AE index reaching several hundred nT. In space over the Antarctic, THEMIS provided spatial information regarding the expected signatures, including dipolarization, fast flows and energetic particle injections. On the ground in the Antarctic, PENGUIn real-time observations from manned stations as well as from the Automated Geophysical Observatories (AGOs) show the high latitude perspective from the southern hemisphere. Magnetometer and induction coil data from the South Pole and from the P1 AGO site show that substorm activity began at least a couple hours earlier than that expressed by the AE index. VLF signals are observed only during the most intense period of the geomagnetic activity and Pi1B substorm signatures were recorded at various locations in both hemispheres, including at Poker Flat in Alaska. In this presentation, a contextual description of the substorm activity is presented, together with an extended discussion of ULF waves, showing the numerous aspects of the temporal evolution of the substorm.
UR: http://www.antarcticspacescience.org
DE: 7836 MHD waves and instabilities (2149, 2752, 6050)
DE: 7845 Particle acceleration
SC: SPA-Magnetospheric Physics [SM]
MN: 2007 Fall Meeting