Surface displacements of the 2014 Cephalonia (Greece) earthquake using high resolution SAR interferometry
Surface displacements of the 2014 Cephalonia (Greece) earthquake using high resolution SAR interferometry
复制标题
使用高分辨率 SAR 干涉测量法测量 2014 年凯法利尼亚岛（希腊）地震的地表位移
DOI：
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发表时间：
2015
影响因子：
2.8
通讯作者：
I. Parcharidis
中科院分区：
文献类型：
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作者：
G. Benekos;K. Derdelakos;Christos Bountzouklis;P. Kourkouli;I. Parcharidis
希腊西部的凯法利尼亚岛遭受了两次强烈地震，震级分别为Mw = 6.0和Mw = 5.9，分别发生在2014年1月26日和2014年2月3日。第一次地震位于阿尔戈斯托利村附近，而第二次地震位于利瓦迪村北部。这两次强烈地震之后伴有较小的余震，引发了广泛的地壳运动和结构破坏效应。差分合成孔径雷达干涉测量（DInSAR）是一种用于地面运动监测的强大遥感工具。自过去二十年以来，DInSAR广泛应用于包括地震等自然灾害在内的各种应用中。2007年，一颗高分辨率的X波段卫星TerraSAR - X发射升空。由于其11天的短重访周期和短波长，它有很好的潜力来捕捉更快的地表运动。本研究涉及使用TerraSAR - X条带图数据应用DInSAR来监测第二次地震事件引起的同震和震后地表变形。使用DInSAR方法，计算了三个差分干涉图，显示了地震前后该地区的位移趋势。结果表明，该岛的主要部分显示出稳定到轻微隆起的状态，而在西部则观察到明显的变形模式。这些发现有助于更好地理解和识别研究区域的局部构造环境，并调查一些定居点受此次地震活动强烈影响的原因。
The island of Cephalonia (Western Greece), was struck by two strong seismic events, with magnitudes Mw = 6.0 and Mw = 5.9 which occurred on Jan. 26, 2014 and Feb. 3, 2014 respectively. The first event was located near Argostoli’s village, whereas the second one was located at the north part of Livadi village. These two strong seismic events were followed by smaller aftershocks provoking extensive crustal movements and structural damage effects. Differential Synthetic Aperture Radar Interferometry (DInSAR) is a powerful remote sensing tool for ground motion monitoring. Since the last two decades, DInSAR is widely used in a variety of applications including natural hazards such as earthquakes. In 2007, a high resolution X-band satellite namely TerraSAR-X was launched. Due to its short revisit cycle of 11 days and its short wavelength, it has a good potential to capture faster surface movements. This study refers to the application of the DInSAR using TerraSAR-X strip map data to monitor the co- and post-seismic surface deformation caused by the second seismic event. Using DInSAR methodology, three differential interferograms were calculated showing the displacement trend of the region, before and after the earthquake. Results demonstrate that the main part of the island shows stability to low uplift whereas in the western part a significant deformation pattern is observed. The findings permit a better understanding and identification of the local tectonic setting of the study area and the investigation of the reasons that some settlements were strongly affected by this seismic activity.