HR: 17:30h
AN: SM14A-06    [Abstracts]
TI: Storm-Time Substorms and Sawtooth Events: Test for Substorm Models
AU: * Pulkkinen, T I
EM: Tuija.Pulkkinen@fmi.fi
AF: Finnish Meteorological Institute, POBox 503, Helsinki, FI-00101 Finland
AU: Tanskanen, E I
EM: Eija.Tanskanen@fmi.fi
AF: Finnish Meteorological Institute, POBox 503, Helsinki, FI-00101 Finland
AU: Reeves, G D
EM: Reeves@lanl.gov
AF: Los Alamos National Laboratory, Mail Stop D-436, Los Alamos, NM 87545 United States
AU: Donovan, E
EM: eric@phys.ucalgary.ca
AF: University of Calgary, Department of Physics and Astronomy, Calgary, T2N 1N4 Canada
AU: Singer, H J
EM: Howard.Singer@noaa.gov
AF: NOAA Space Environment Center, 325 Broadway, Boulder, CO 80305 United States
AU: Slavin, J A
EM: James.A.Slavin@nasa.gov
AF: NASA Goddard Space Flight Center, Code 696, Greenbelt, MD 20771 United States
AB: A substorm search engine is used to identify substorm onsets that occur during magnetic storms in the period 2001-2004. Each substorm is analyzed in detail using several parameters to classify the events. Peak amplitude of the substorm is defined from the AL-index. Existence and type of energetic particle injections are determined from the LANL energetic ion and electron data. Tail magnetic field measurements (GOES, Cluster, Geotail) are used to infer whether a thin current sheet was formed prior to the substorm onset. Latitudinal magnetometer chains (CANOPUS, IMAGE) are used to determine whether the main expansion direction was poleward or equatorward. Possible triggers for the onset and intensity of the driving electric field are identified from the solar wind and interplanetary magnetic field measurements (ACE, WIND). The goal of the study is to statistically examine to what extent the stormtime substorms show signatures typically associated classical non-storm substorms and to what extent the activity is characteristic only of storm periods. Furthermore, the goal is to identify the "sawtooth events" from the data set, and examine whether the activation characteristics differ from the other stormtime activations.
DE: 2730 Magnetosphere: inner
DE: 2736 Magnetosphere/ionosphere interactions (2431)
DE: 2740 Magnetospheric configuration and dynamics
DE: 2788 Magnetic storms and substorms (7954)
SC: SPA-Magnetospheric Physics [SM]
MN: Fall Meeting 2005