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Geomagnetic field variations caused by changes in the quiet-time solar wind pressure |
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| Authors: | P Verzariu |
| Institution: | The Johns Hopkins University, Applied Physics Laboratory, Silver Spring, Maryland 20910, U.S.A.; Laboratory for Space Physics, Goddard Space Flight Center, Greenbelt, Maryland 20771, U.S.A.; University of California, Los Alamos Scientific Laboratory, Los Alamos, New Mexico, U.S.A. |
| Abstract: | Solar wind data from the Vela 2A and 2B satellites are compared with hourly Dst values for the period July 1964–July 1965. During periods of positive Dst on magnetically quiet days the square root of the solar wind pressure is found to be statistically linearly correlated to the hourly Dst values. This relation is in accordance with the theoretical expectation from the pressure balance at the magnetopause between the solar wind plasma and the Earth's magnetic field. A constant of proportionality relating the two quantities is statistically determined. The average value for the proportionality constant agrees favorably with the theoretical value given by the Mead-Beard magnetosphere model. |
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