Displacement analysis of the October 30, 2020 (M w = 6.9), Samos (Aegean Sea) earthquake

IF 0.9 Q4 REMOTE SENSING
A. Çırmık, O. Ankaya Pamukçu, F. Doğru, A. Cingöz, Ö. Özdağ, H. Sözbilir
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Abstract

Destructive earthquakes with high deformations have occurred in the Aegean region since the historical period. The most destructive of these earthquakes in recent years is the October 30, 2020 (M w = 6.9) Samos (Aegean Sea) earthquake. This earthquake affected a wide area and caused numerous losses of lives and property especially in Izmir city. For examining the effects of the earthquake, Global Navigation Satellite System (GNSS) data before, during, and after the earthquake were processed, and coseismic and postseismic displacement evaluations were made. Interferometric Synthetic Aperture Radar (InSAR) ascending, descending interferograms, line of sight velocity, and displacement maps were obtained for the earthquake-affected area. The GNSS and InSAR data were evaluated together, and the areas with subsidence and uplift were determined in conjunction with the fault zone. In addition, the horizontal displacements were analyzed by using Coulomb failure criteria, and peak ground displacements were obtained from the strong motion stations located in the study region. As a result, from all the displacement analyses, it was determined that high-amplitude energy was released, at the regional scale from Ayvalık in the North to Datça in the South after the earthquake, and this earthquake generated permanent deformation in the affected region.
2020 年 10 月 30 日萨摩斯(爱琴海)地震(M w = 6.9)的位移分析
自历史时期以来,爱琴海地区就发生过高变形破坏性地震。近年来最具破坏性的地震是 2020 年 10 月 30 日(M w = 6.9)萨摩斯(爱琴海)地震。这次地震影响范围广,造成了大量的生命和财产损失,尤其是在伊兹密尔市。为了研究地震的影响,对地震前、地震中和地震后的全球导航卫星系统(GNSS)数据进行了处理,并对地震前后的位移进行了评估。获得了地震灾区的干涉合成孔径雷达(InSAR)上升、下降干涉图、视线速度和位移图。同时评估了全球导航卫星系统和 InSAR 数据,并结合断层带确定了下沉和隆起区域。此外,还利用库仑破坏标准分析了水平位移,并从位于研究区域的强震台站获得了地面位移峰值。因此,从所有位移分析中可以确定,地震发生后,从北部的 Ayvalık 到南部的 Datça 的区域范围内释放了高振幅能量,地震在受影响地区产生了永久变形。
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来源期刊
Journal of Geodetic Science
Journal of Geodetic Science REMOTE SENSING-
CiteScore
1.90
自引率
7.70%
发文量
3
审稿时长
14 weeks
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