Using magnetoseismology to remotely sense the plasmasphere dynamics.
Del Corpo A., Vellante M., Heilig B., Pietropaolo E., Reda J., Lichtenberger J.
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IV - Geofisica e fisica dell'ambiente
GSSI Ex ISEF - Aula D - Lunedì 23 h 15:00 - 19:00
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The Earth is encircled by a torus-like region of cold plasma, the plasmasphere, which continuously changes its configuration in response to geomagnetic disturbances. Seismological methods, applied to plasma waves that naturally occur in the magnetosphere, form the discipline of magnetoseismology and can be used to remotely sense the plasmaspheric mass density. We present recent developments of a technique meant to monitor the plasmasphere in quasi-real time and discuss its importance in the space weather context. The technique is based on the spectral analysis of Ultra-Low-Frequency magnetic signals recorded by magnetometer arrays on the ground.