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| The Kangding earthquake swarm of November, 2014 |
| Wen Yang1, Jia Cheng2, Jie Liu1, Xuemei Zhang1 |
1 China Earthquake Networks Center, Beijing 100045, China
2 Institute of Geology, China Earthquake Administrator, Beijing 100029, China |
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Abstract There was an earthquake swarm of two major events of MS6.3 and MS5.8 on the Xianshuihe fault in November, 2014. The two major earthquakes are both strike-slip events with aftershock zone along NW direction. We have analyzed the characteristics of this earthquake sequence. The b value and the h value show the significant variations in different periods before and after the MS5.8 earthquake. Based on the data of historical earthquakes, we also illustrated the moderate-strong seismic activity on the Xianshuihe fault. The Kangding earthquake swarm manifests the seismic activity on Xianshuihe fault may be in the late seismic active period. The occurrence of the Kangding earthquake may be an adjustment of the strong earthquakes on the Xianshuihe fault. The Coulomb failure stress changes caused by the historical earthquakes were also given in this article. The results indicate that the earthquake swarm was encouraged by the historical earthquakes since 1893, especially by the MS7.5 Kangding earthquake in 1955. The Coulomb failure stress changes also shows the subsequent MS5.8 earthquake was triggered by the MS6.3 earthquake.
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| Fund:Spark Program of Earthquake Science of China under Grant No. XH15047Y and National Natural Science Foundation of China under Grant No. 41274062. |
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