当前位置: X-MOL 学术Geochemistry, Geophys. Geosystems › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Space‐Time Stress Variations on the Palu‐Koro Fault Impacting the 2018 Mw 7.5 Palu Earthquake and Its Seismic Hazards
Geochemistry, Geophysics, Geosystems ( IF 4.480 ) Pub Date : 2021-05-05 , DOI: 10.1029/2020gc009552
Chang Liu 1 , Yaolin Shi 2
Affiliation  

In this study, we calculated the Coulomb stress change before and after the 2018 Palu earthquake (Mw 7.5) induced by historical large earthquakes on and around the Palu‐Koro fault (PKF) within Sulawesi Island, Indonesia. We found that the 1996 earthquake (Mw 7.9) on the Minahassa thrust likely promoted the 2018 Palu earthquake by stress loading on its hypocenter. Stress shadows in the PKF impacted the 2018 earthquake rupture’s southward unilateral propagation and termination. Stress increases in the two seismic gaps to the north and south ends of the PKF have resulted in increased seismic hazards, calling close attention to hazard prevention in central Sulawesi. This indicates that fault‐interaction‐induced stress variations on the PKF significantly controlled the 2018 Palu earthquake and its seismic hazards. Our study is important for understanding stress triggering between the subduction earthquakes and intraplate earthquakes in thrust and strike‐slip faults systems globally.

中文翻译:

Palu-Koro断层的时空应力变化影响2018年Mw 7.5 Palu地震及其地震危险

在这项研究中,我们计算了印度尼西亚苏拉威西岛内Palu-Koro断层(PKF)及其周围地区发生的历史性大地震引起的2018年Palu地震(Mw 7.5)之前和之后的库仑应力变化。我们发现,1996年Minahassa逆冲地震(7.9兆瓦)可能是由于震源上的应力载荷推动了2018年帕卢地震。PKF中的应力阴影影响了2018年地震破裂的向南单边传播和终止。PKF北端和南端的两个地震缝隙中的应力增加导致地震危险性增加,因此需要密切注意苏拉威西省中部的危险预防。这表明PKF上的断层相互作用引起的应力变化显着控制了2018年帕卢地震及其地震危害。
更新日期:2021-05-14
down
wechat
bug