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Temporal variation characteristics of shear-wave splitting for the Rushan earthquake swarm of Shandong Province.

Authors :
Qingjie Miao
Xiqiang Liu
Source :
AIP Conference Proceedings; 2017, Vol. 1820 Issue 1, p1-7, 7p, 1 Diagram, 3 Graphs, 2 Maps
Publication Year :
2017

Abstract

The seismicity in Rushan region of Shandong Province is characterized by small swarms after the ML3.8 Rushan earthquake on October 1, 2013, and this situation continues up to now. Four earthquakes with ML4.7, ML4.5, ML4.1 and ML5.0 occurred from January of 2014 to May of 2015 cause great social effects. Based on the seismic records from the Rushan station, this paper calculated the shear-wave splitting parameters of 224 small earthquakes of Rushan earthquake swarm. The result shows that the polarization direction of the fast shear-wave is consistent with the principal compressive stress direction of the Shandong peninsula; on the other hand, the time delay has obvious change before and after the four earthquakes, that is, it raised about one month and declined about twelve days before earthquake. All the characteristics can be taken as the precursor indicator for earthquake prediction based on stress. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
0094243X
Volume :
1820
Issue :
1
Database :
Complementary Index
Journal :
AIP Conference Proceedings
Publication Type :
Conference
Accession number :
121851417
Full Text :
https://doi.org/10.1063/1.4977338