Abstract
In our study, we contribute one another connection between geophysics
and planetary science by investigating influence of Solar Dipole field
(SDF) and frequency of Earthquake’s occurence. First, during period from
solar maximum at 2000 to solar maximum at 2012, we compare variations of
Number of World’s Earthqaukes (NEQKs) , Solar Dipole (SDF) with
equatorial (E-SDF) and axial (A-SDF)components which contribute to of
Interplanetary Magnetic Field (IMF). Then, to describe diverging of
outer core leading to earthquake, we apply a model of spherical shell
composed of co-axial circular areas of infinatisimal thickness. The
largest of them surrounds equatorial plane. The shell contains bulk of
outer core’s conductive liquid. According to our model, we focus on
total contributions from forces applied by Axial and Equatorial Dipole
Fields, of Earth (A-EDF and E-EDF) along the radial distance, to act on
azimuthal elecrical flow and convectional elecrical flows, respectively.
Influence of Coriolis force decreases whenever the force acting on the
convectional flow is effective to push the outer core diverges toward
mantle to trigger an earthquake . Plotting of Number of Geomagnetic
Storms (N-GMS) per Year is considered, the variations in N-GMS, and the
strengths of A-SDF and E-SDF, are seen to be connected with the
variations in N-WEQKs, throughout the solar storms, for the period of
interest. During rising phase from 2000 to 20003, as the strength of SDF
with dominant components of west to east oriented (WE ) E-SDF , which
contributes mainly to IMF, increases. As the strength of WE IMF,
increases, number of solar storms increases. The increasing number of
solar storms , which distort the EDF with components of EW E-EDF and
northward (NW) Axial EDF (A-EDF), results in decsending N-WEQKs . During
rising phase from 2003 to 2009, as the strength of SDF with dominant
components of west to east oriented (WE) E-SDF , which contributes
mainly to IMF , decreases, the strength of WE IMF and number of solar
storms decrease and leads to increase in N-WEQKs . During rising phase
from 2009 to 2011, as the strength of SDF with dominant components of
southward (SW ) SADF , which contributes mainly to IMF, decreases. leads
to more effective NW A-EDF which results in ascending N-WEQKs.D uring
rising phase from 2011 to 2012, the strength of SDF with dominant east
to west oriented (EW ) SEDF , which contributes mainly to IMF ,
increases. The increasing strength of EW IMF leads to less effective NW
A-EDF. Hence, N-WEQKs is reduced. To conclude, our study shows that
better modeling and forecasting of earthquakes could be done throughout
the conditions in Earth-Sun system, instead of conditions just on Earth.