Effect of change in large and fast solar wind dynamic pressure on geosynchronous magnetic field
Borodkova N La), Liu Jing-Bo(刘静波)b), Huang Zhao-Hui(黄朝晖)b)†, Zastenker G Na), Wang Chi(王赤)b), and Eiges P Ea)
a Space Research Institute, Moscow, Russia; b State Key Laboratory of Space Weather, Center for Space Science and Applied Research, Chinese Academy of Sciences,Beijing 100080, China
Abstract We present a comparison of changes in large and sharp solar wind dynamic pressure, observed by several spacecraft, with fast disturbances in the magnetospheric magnetic field, measured by the geosynchronous satellites. More than 260 changes in solar wind pressure during the period 1996--2003 are selected for this study. Large statistics show that an increase (a decrease) in dynamic pressure always results in an increase (a decrease) in the magnitude of geosynchronous magnetic field. The amplitude of response to the geomagnetic field strongly depends on the location of observer relative to the noon meridian, the value of pressure before disturbance, and the change in amplitude of pressure.
Received: 02 April 2006
Revised: 05 June 2006
Accepted manuscript online:
Fund: Project supported by the Russian Foundation for
Basic Researches (Grant Nos 04-02-16152 and 04-02-39004), the International Association for the Promotion of Co-operation with Scientists from the New Independent States of the Former Soviet Union (Grant Nos
Cite this article:
Borodkova N L, Liu Jing-Bo(刘静波), Huang Zhao-Hui(黄朝晖), Zastenker G N, Wang Chi(王赤), and Eiges P E Effect of change in large and fast solar wind dynamic pressure on geosynchronous magnetic field 2006 Chinese Physics 15 2458
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