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Goncharov Oleg

Institute:
Faculty of Mathematics and Physics, Charles University, Prague.
Prague, Ukraine

INTERPLANETARY SHOCKS AND THEIR IMPACT ON THE EARTH

Authors: Goncharov, O., Urbar, J., Grygorov, K., Safrankova, J., Nemecek, Z., Prech, L., Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic
Poster presentation

Propagation of interplanetary (IP) shocks through the interplanetary space, their modification in the foreshock and interaction with the bow shock and magnetopause are key problems of the Space Weather Program because they are often connected with strong geomagnetic disturbances. The situation with several monitors (ACE, Wind, SOHO, and one THEMIS probe) and a number of spacecraft (THEMIS, Cluster, Geotail, GOES) orbiting in the different magnetospheric regions allows us to trace the original shock and induced discontinuities through them. The study is based on the shock local normals and speeds calculated using a full set of R-H equations as well as on the global shock parameters calculated from the times and locations of multipoint observations in the solar wind and magnetosphere. The main goal of the present study is to analyze the propagation of shocks through the magnetosphere and their transformation to geomagnetic disturbances. We use geomagnetic indices to quantify the response of the inner magnetosphere and ground magnetic field on impacts of shocks with different parameters and origin.
space weather, magnetosphere, geomagnetic disturbances, solar wind

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