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Global frequency distributions of pulsations driven by sharp decrease of solar wind dynamic pressure

Wang, Zhi Qiang

On 24 August 2005, an impulse of solar wind dynamic pressure (Psw) hit the magnetosphere. Using the high resolution geomagnetic field data from 15 ground stations and the data from Geotail and TC-1, we studied the geomagnetic pulsations at auroral latitudes driven by the sharp decrease of Psw at the trailing edge of the impulse. The results show t…