Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 40, issue 6
Articles | Volume 40, issue 6
https://doi.org/10.5194/angeo-40-641-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-40-641-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 40, issue 6
Regular paper
 | 
09 Nov 2022
Regular paper |  | 09 Nov 2022

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

Hiroatsu Sato, Hans Pécseli, Jan Trulsen, Per Even Sandholt, and Charles Farrugia

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Latest update: 23 Nov 2024
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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.
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