Multi-instrument study of transient event observed at the South Pole

Details Multi-instrument study of transient event observed at the South Pole Multi-instrument study of transient event observed at the South Pole

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsm11a0803k&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #SM11A-0803

Physics

2784 Solar Wind/Magnetosphere Interactions

Scientific paper

We identified magnetic impulsive events observed in South Pole magnetograms during the period 1995-1997. We use very high-time resolution magnetometer data from GOES 8, GOES 9 and GOES 10 spacecraft to examine corresponding signatures in geosynchronous data. We determine the dependence of the event's spatial extent, velocity and direction of propagation in the magnetosphere on local time. We show that the transient event motion near local noon is controlled by the IMF orientation. These results are supported by imaging riometer observations. We compare the signatures and motion of transient events observed in the ionosphere with those estimated based on timing of the geosynchronous observations. The generation mechanisms of MIEs are discussed.

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