Articles | Volume 40, issue 6
Ann. Geophys., 40, 641–663, 2022
https://doi.org/10.5194/angeo-40-641-2022
Ann. Geophys., 40, 641–663, 2022
https://doi.org/10.5194/angeo-40-641-2022
Regular paper
09 Nov 2022
Regular paper | 09 Nov 2022

Impulse-driven oscillations of the near-Earth's magnetosphere

Hiroatsu Sato et al.

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Short summary
An abrupt increase in pressure associated with interplanetary shocks will compress the Earth's magnetic field. This leads to a sudden impulse also observed in low-latitude magnetometer records. These events are followed by heavily damped oscillations of approximately 5 min periods, depending on plasma conditions. The general features are explained by a simple model. Our results are supported by satellite and ground-based observations. The results are also important for space–weather predictions.