The Seismotectonic Setting and Effect on the Neighbouring Seismicity
Trend of Ms 8.1 Earthquake on April 25, 2015
1 Hubei Key Laboratory of Earthquake Early Warning, Institute of Seismology, CEA, 40 Hongshance Road, Wuhan 430071, China
2 Institute of Earthquake Engineering of Wuhan, 40 Hongshance Road, Wuhan 430071, China
3 Faculty of Earth Science, China University of Geosciences, 388 Lumo Road, Wuhan 430074, China
Abstract：Based on previous research, we analyze seismogenic structure, the triggering of aftershocks by mainshock, and the subsequent distribution of aftershocks, on the basis of which we discuss the seismicity trends surrounding the Nepal earthquake. The preliminary study suggests that the main boundary fault is responsible for this event, belonging to low-angle thrust faulting. The spatial distribution range of aftershocks is basically consistent with source rupture area and pattern, characterized by a migration eastward in time sequence. Furthermore, both the earthquake events of Nielamu Ms5.3 and Dingri Ms5.9 may be consequences of the tectonic stress field changes caused by the mainshock, and do not belong to its aftershock. The most seismically dangerous area is in a certain segment between the mainshock and the Himalayan eastern structural syntaxis along the subduction zone of the Indian and Eurasian plates.
LEI Dongning,CAI Yongjian,LI Heng et al. The Seismotectonic Setting and Effect on the Neighbouring Seismicity
Trend of Ms 8.1 Earthquake on April 25, 2015[J]. jgg, 2015, 35(5): 738-741.
