Piezomagnetic potentials due to an inclined rectangular fault in a semi-infinite medium

Details Piezomagnetic potentials due to an inclined rectangular fault in a semi-infinite medium Piezomagnetic potentials due to an inclined rectangular fault in a semi-infinite medium

Mar 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000geoji.140..479u&link_type=abstract

Geophysical Journal International, Volume 140, Issue 3, pp. 479-492.

Astronomy and Astrophysics

Astronomy

11

Inclined Fault, Piezomagnetic Potential, Seismomagnetic Effect

Scientific paper

Analytical solutions for the piezomagnetic potentials are derived for strike-slip, dip-slip and tensile-opening fault motions with arbitrary dip and strike angles, so as to be applicable in various types of earthquakes. These solutions are expressed as the composition of elementary functions which are identical to the magnetic potentials produced by magnetic dipoles, quadrupoles and octupoles distributed on the fault plane and other planes. Therefore, the geomagnetic field changes due to the piezomagnetic effect are expressed by the superposition of the fields produced by these equivalent sources. Examples of calculated results show characteristic features for various types of fault motions as follows: (1) the pattern of the geomagnetic field changes becomes significantly different depending on the strike direction, although the maximum amplitude is almost the same for all directions; (2) the geomagnetic field change reaches a maximum at a dip angle of 90 deg for strike-slip and tensile-opening fault motions and at 45 deg for dip-slip fault motion.

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