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Geodetic Source Modeling of the 2019 Mw 6.3 Durrës, Albania, Earthquake: Partial Rupture of a Blind Reverse Fault
Geophysical Research Letters ( IF 4.6 ) Pub Date : 2020-10-22 , DOI: 10.1029/2020gl088990
M. Govorčin 1 , S. Wdowinski 2 , B. Matoš 3 , G. J. Funning 4
Affiliation  

We address geometric and kinematic properties of the Mw 6.3 26 November 2019 Durrës earthquake, the strongest earthquake in Albania in the past 40 years. Using coseismic surface displacements from Sentinel‐1 Differential Interferometric Synthetic Aperture Radar (DInSAR) and nearby Global Navigational Satellite System (GNSS) stations, we invert for the geometry and slip of the causative fault. We find that both a steep SW‐dipping fault (dip 71°) and a shallow NE‐dipping fault (dip 15°) can fit the data equally well. However, the slip on the SW‐dipping fault occurs at depths 11–23 km, similar to the depths of the mainshock and aftershock seismicity, and thus, we prefer that model. The location of our preferred fault plane correlates with the mapped SW‐dipping backthrust, the Vore fault. The fault rupture did not reach the surface, which implies that an updip stress propagation onto the unruptured shallow portion of the Vore fault and its secondary structures pose an increased seismic hazard for cities in Albania, including the capital, Tirana.

中文翻译:

2019兆瓦6.3都拉斯,阿尔巴尼亚,地震的大地源模拟:反向逆断层的局部破裂

我们讨论了M w的几何和运动学性质6.3 2019年11月26日,杜拉斯地震是过去40年来阿尔巴尼亚最强烈的地震。利用Sentinel-1差分干涉合成孔径雷达(DInSAR)和附近的全球导航卫星系统(GNSS)站的同震表面位移,我们对引起的断层的几何形状和滑动进行了反演。我们发现陡峭的SW倾角断层(倾角71°)和浅NE倾角断层(倾角15°)都可以很好地拟合数据。但是,西南倾覆断层的滑动发生在11-23 km的深度,类似于主震和余震的地震活动深度,因此,我们更喜欢这种模型。我们首选的断层平面的位置与映射的西南倾覆反冲,即沃尔断层有关。断层破裂没有到达表面,
更新日期:2020-11-12
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