Storm-Time Substorms and Sawtooth Events: Test for Substorm Models

Details Storm-Time Substorms and Sawtooth Events: Test for Substorm Models Storm-Time Substorms and Sawtooth Events: Test for Substorm Models

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsm14a..06p&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #SM14A-06

Other

2730 Magnetosphere: Inner, 2736 Magnetosphere/Ionosphere Interactions (2431), 2740 Magnetospheric Configuration And Dynamics, 2788 Magnetic Storms And Substorms (7954)

Scientific paper

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.

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