Linkage between reactivation of the sinistral strike-slip faults and 28 September 2018 Mw7.5 Palu earthquake, Indonesia  

作　　者：Gege Hui Sanzhong Li Pengcheng Wang Yanhui Suo Qian Wang Ian D.Somerville 

机构地区：[1]Key Laboratory of Submarine Geosciences and Prospecting Techniques,Ministry of Education,College of Marine Geosciences,Ocean University of China [2]Laboratory for Marine Geology,Qingdao National Laboratory for Marine Science and Technology [3]College of Oceanography,Hohai University [4]School of Earth Sciences,University College Dublin

出　　处：《Science Bulletin》2018年第24期1635-1640,共6页科学通报（英文版）

基　　金：National Programme on Global Change and Air-Sea Interaction, State Oceanic Administration (GASI-GEOGE-01);National Key Research and Development Program of China (2017YFC0601401 and 2016YFC0601002);supported by Aoshan Talents Program Supported by Qingdao National Laboratory for Marine Science and Technology to Prof. Sanzhong Li (2015ASTP-0S10);the Taishan Scholar Program to Prof. Sanzhong Li

摘　　要：On September 28, 2018, a Mw7.5 earthquake occurred near Sulawesi, Indonesia as a result of strike-slip faulting at shallow depth within the interior of the Molucca Sea Microplate that forms a part of the broader Sunda Plate. Focal mechanism solutions and distribution for the earthquakes indicate rupture occurred on a left-lateral NNW-SSE-to N-S-striking fault. This region has been characterized by complex tectonics in which motions of numerous small microplates are accommodating large-scale convergence between the Australia, Sunda, Pacific and Philippine Sea plates. In this paper, the Coulomb stress calculation verified the WNW-, nearly E-W-trending sinistral strike slip receiver fault in Sulawesi, which is consistent with the giant sinisterly strike-slip fault system across New Guinea, Pacific Tectonic System and the Tethys Tectonic System caused by the oblique convergence. The result has been reconciled within the modern GPS velocity field.On September 28, 2018, a Mw7.5 earthquake occurred near Sulawesi, Indonesia as a result of strike-slip faulting at shallow depth within the interior of the Molucca Sea Microplate that forms a part of the broader Sunda Plate. Focal mechanism solutions and distribution for the earthquakes indicate rupture occurred on a left-lateral NNW-SSE-to N-S-striking fault. This region has been characterized by complex tectonics in which motions of numerous small microplates are accommodating large-scale convergence between the Australia, Sunda, Pacific and Philippine Sea plates. In this paper, the Coulomb stress calculation verified the WNW-, nearly E-W-trending sinistral strike slip receiver fault in Sulawesi, which is consistent with the giant sinisterly strike-slip fault system across New Guinea, Pacific Tectonic System and the Tethys Tectonic System caused by the oblique convergence. The result has been reconciled within the modern GPS velocity field.

关 键 词：Palu EARTHQUAKE FAULT REACTIVATION MICROPLATE CONVERGENCE Sinistral stress-field 

分 类 号：N[自然科学总论]