TITLE:
Model of the singular current source—The indicator of geodynamic processes in Japan in 2009-2011
AUTHORS:
Ludmila F. Moskovskaya
KEYWORDS:
Precursors of Earthquakes; Processing of Magnetic Field Measurement; Geodynamics
JOURNAL NAME:
Natural Science,
Vol.5 No.8A,
August
20,
2013
ABSTRACT:
The
calculation method of the location of the singular generalized current source
according to synchronous measurements of the magnetic field in the remote
points is proposed. It is designed for the continuous monitoring of changes of
the degree of electromagnetic heterogeneity of the geophysical environment.
Regular fluctuations of the apparent distance to the effective single source
were recorded according to the magnetic data of the observatories in Japan
2009-2011. They are connected with the rhythm of the geodynamic processes in
the vicinity of the station Kakioka. The most significant decrease in the
apparent distance was registered in connection with the seismic activation of
the region, including the catastrophic earthquake of March 11, 2011 with a magnitude
of M = 9.1. The anomalous behavior of the apparent
parameters of the generalized source was displayed not less than two
weeks before the earthquake. Characteristic changes of the curves were
registered in the period of three months.