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Message Subject SOLAR WATCH * 312 M & 25 X FLARES starting 3-7-2011 (Updated Daily)
Poster Handle Red Hot Chilean Pepe (nli)
Post Content
Relationship between solar flares and earthquakes

Title:

Whether solar flares can trigger earthquakes?
Authors:
Jain, R.
Affiliation:
AA(Physical Research Laboratory, Physical Research Laboratory (Dept. of Space, Govt. of India) Navrangpura, Ahmedabad, Ahmedabad, 380 009, India ; rajmal@prl.res.in)
Publication:
American Geophysical Union, Spring Meeting 2007, abstract #IN33A-03
Publication Date:
05/2007
Origin:
AGU
AGU Keywords:
7526 Magnetic reconnection (2723, 7835)
Bibliographic Code:
2007AGUSMIN33A..03J
Abstract
We present the study of 682 earthquakes of ¡Ý4.0 magnitude observed during January 1991 to January 2007 in the light of solar flares observed by GOES and SOXS missions in order to explore the possibility of any association between solar flares and earthquakes. Our investigation preliminarily shows that each earthquake under study was preceded by a solar flare of GOES importance B to X class by 10-100 hrs. However, each flare was not found followed by earthquake of magnitude ¡Ý4.0. We classified the earthquake events with respect to their magnitude and further attempted to look for their correlation with GOES importance class and delay time. We found that with the increasing importance of flares the delay in the onset of earthquake reduces. The critical X-ray intensity of the flare to be associated with earthquake is found to be ~10-6 Watts/m2. On the other hand no clear evidence could be established that higher importance flares precede high magnitude earthquakes. Our detailed study of 50 earthquakes associated with solar flares observed by SOXS mission and other wavebands revealed many interesting results such as the location of the flare on the Sun and the delay time in the earthquake and its magnitude. We propose a model explaining the charged particles accelerated during the solar flare and released in the space that undergone further acceleration by interplanetary shocks and produce the ring current in the earth's magnetosphere, which may enhance the process of tectonics plates motion abruptly at fault zones. It is further proposed that such sudden enhancement in the process of tectonic motion of plates in fault zones may increase abruptly the heat gradients on spatial (dT/dx) and temporal (dT/dt) scales responsible for earthquakes.

[link to adsabs.harvard.edu]
 
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