Abstract Based on the digital waveforms of the eastern China seismic network, the best double-couple focal mechanism and the depth of the Wuwei ML4.1 earthquake of April 6, 2008 is determined using the CAP method, and the earthquake sequence from 2016 in Wuwei area is relocated using the HypoDD method. The result shows that the best double couple solution of the ML4.1 event is strike 120°, dip 57°, rake 27° and strike 15°, dip 68°, rake 144°, respectively. The depth of the centroid of the Wuwei ML4.1 event is about 12 km. The relocation of the Wuwei earthquake sequence shows it to be distributed along the southwestern boundary of Wuwei basin in the southeast direction, with the earthquake sequence propagated from northwest to southeast. According to the focal mechanism derived using the CAP method and the relocation of earthquake sequence from 2016 in the Wuwei area, we estimate the fault plane solution for Wuwei ML4.1 earthquake is the nodal plane I. Possible, Wuwei ML4.1 earthquake is generated by the movement of the northwesterly fault, which is at the base of the southwestern boundary of the Wuwei basin under regional stress field.
LI Feng,MIAO Ali,LI Yingchun et al. Focal Mechanism and Depth and Seismogenic Structure of the Wuwei ML4.4 Earthquake, April 6, 2018[J]. jgg, 2019, 39(8): 790-793.
LI Feng,MIAO Ali,LI Yingchun et al. Focal Mechanism and Depth and Seismogenic Structure of the Wuwei ML4.4 Earthquake, April 6, 2018[J]. jgg, 2019, 39(8): 790-793.