On the excitation of magnetic signals by Love waves

A. V. Guglielmi, A. S. Potapov, B. Tsegmed

Abstract


The polarization method for recognition of seismomagnetic waves against a noise background is presented. The method is applied to detection of magnetic oscillations accompanying the propagation of surface Love wave after a strong earthquake. A specific property of the Love waves is that theoretically the Tolman-Stewart effect is alone responsible for the magnetic field that penetrates into the Earth's surface. Data from the Mondy Magnetic Observatory and the Talaya Seismic Station suggest that the arrival time, duration, period,and polarization of magnetic signals conform with the idea of generation of alternating electric currents due to fluid vibrations in pores and fractures of rocks under the action of the inertial force associated with the Love wave propagation.

Keywords


Earth crust;Tolman-Stewart effect

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DOI: https://doi.org/10.4401/ag-3269

Published by INGV, Istituto Nazionale di Geofisica e Vulcanologia - ISSN: 2037-416X