Using Focal Mechanism to Distinguish Types of Earthquake Events in Shanxi
Abstract Using the gCAP method, we determine several full moment tensor solutions of 87 natural earthquakes, 18 collapse events and 9 blasting events that occurred from 2010 to 2019 in Shanxi. The results show that the gCAP method has a good effect in inverting the focal mechanism solution in Shanxi. The fault movement of Yanhu ML4.8 earthquake in Shanxi on March 12, 2016 was strike-slip and normal fault, which is an inward closed fracture with reduced volume, having an obvious non-double-couple component. Whether the proportion of dual-couple components in the full moment tensor solution of earthquake events in Shanxi is greater than 80% can be used as a basis for distinguishing between natural earthquakes and non-natural earthquake events. For non-natural earthquake events, when the parameter ζ>0, it is an outward explosion source, on the contrary, it is an inward closed source.
Key words ：
focal mechanism
gCAP
full moment tensor solution
non-natural earthquake
distinguish
Cite this article:
YIN Weiwei,ZHANG Hui. Using Focal Mechanism to Distinguish Types of Earthquake Events in Shanxi[J]. jgg, 2021, 41(8): 846-852.
YIN Weiwei,ZHANG Hui. Using Focal Mechanism to Distinguish Types of Earthquake Events in Shanxi[J]. jgg, 2021, 41(8): 846-852.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2021/V41/I8/846
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