Physics
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsm21c..07l&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #SM21C-07
Physics
7836 Mhd Waves And Instabilities (2149, 2752, 6050), 7845 Particle Acceleration
Scientific paper
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.
Clauer R.
Detrick Daniel
Engebretson Mark J.
Frey Harald
Inan Umran
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