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Focal mechanism of the Sheyang MS4.4 earthquake on October 20, 2016 and the spatio-temporal distribution of the earthquake sequence
|Authors:||Li Feng; Li Yingchun; Li Qiang; Feng Zhisheng; Wang Junfei|
|Author Affiliations:||Primary: |
Earthquake Administration of Jiangsu Province, Nanjing, China
Earthquake Administration of Fujian Province, China
|Volume Title:||Dizhen Xuebao Acta Seismologica Sinica|
|Source:||Dizhen Xuebao = Acta Seismologica Sinica, 39(5), p.659-668. Publisher: Kexue Chubanshe, Beijing, China. ISSN: 0253-3782|
|Note:||In Chinese with English summary|
|Summary:||Based on the digital waveforms of Jiangsu seismic network, the focal mechanism of the Sheyang MS4.4 earthquake was determined by using the CAP (cut and paste) method, and the ML=1.5 events of Sheyang earthquake sequence were relocated by using the HypoDD method. The result shows that the strike, dip and rake of the MS4.4 event are 304°, 53°, 0° for the nodal plane I, and 214°, 90°, 143° for the nodal plane II, respectively, and the centroid depth is about 14 km. The relocation for the Sheyang earthquake sequence shows that the earthquake sequence was located between Hongze-Goudun fault and Yancheng-Nanyang'an fault with the predominant direction NW60° in horizontal space, and the sequence propagated from southeast to northwest with the focal depth of 6-23 km. According to the focal mechanism solutions and the relocation results, we deduce that the Sheyang MS4.4 earthquake is a left-lateral slip event induced by shear rupture northwestwards under regional stress field, and its fault plane is nodal plane I.|
|Copyright Information:||GeoRef, Copyright 2021 American Geosciences Institute.|
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