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首页> 外文期刊>Seismological research letters >Static Slip Model of the 2017 M-w 5.4 Pohang, South Korea, Earthquake Constrained by the InSAR Data
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Static Slip Model of the 2017 M-w 5.4 Pohang, South Korea, Earthquake Constrained by the InSAR Data

机译：2017 M-W 5.4蒲岗，韩国的静电模型，地震受到INSAR数据的约束

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摘要

An M-w 5.4 earthquake occurred in the city of Pohang in the southeastern part of the Korean Peninsula on 15 November 2017. It was a moderate-sized crustal event but triggered enormous attention from the Korean public because strong shaking was felt over the whole country, and it had been just a year since the M-w 5.5 Gyeongju earthquake, the largest instrumentally recorded event in the country. Both earthquakes occurred within 40 km of each other. The Pohang earthquake provides a unique opportunity to constrain the static slip model of an earthquake in Korea using spaceborne Interferometric Synthetic Aperture Radar (InSAR) observations because the focal depth is relatively shallow (similar to 4 km), and surface displacement fields were successfully obtained by both descending and ascending orbits of the Sentinel-1A/B satellites. We performed a linear slip inversion using the InSAR data. Our slip model reveals that a major slip associated with the event occurred in the northeastern part of the hypocenter rather than in the southwestern part. In addition, its rupture dimension and mean slip are 5 km (width) by 6 km (length) and 15 cm, respectively. The InSAR data also show that no significant postseismic deformation occurred after the event.
机译：MW 5.4地震发生在2017年11月15日朝鲜半岛东南部的浦项市。这是一个中等大小的地壳事件，但引发了韩国公众的巨大关注，因为在全国范围内感受到强烈的摇晃，而且自从MW 5.5 55届庆州地震以来一年以来，该国最大的有人录制的活动。两种地震都发生在40千米范围内。 Pohang地震提供了一个独特的机会，使用星载干涉性合成孔径雷达（Insar）观察来限制韩国地震的静电模型，因为焦深相对较浅（类似于4公里），并且成功获得了表面位移场Sentinel-1a / b卫星的降序和升序轨道均。我们使用INSAR数据执行了线性滑移反转。我们的滑动模式表明，与该事件相关的主要滑移在斜视的东北部门而不是西南部。此外，其破裂尺寸和平均滑动分别为5公里（宽度），分别为6公里（长）和15厘米。 INSAR数据还表明，事件发生后不会发生显着的后近变形。

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  • 来源
    《Seismological research letters》 |2019年第1期|共9页
  • 作者

    Song Seok Goo; Lee Hoonyol;

  • 作者单位

    Korea Inst Geosci &

    Mineral Resources Earthquake Res Ctr 124 Gwahang No Daejeon 34132 South Korea;

    Kangwon Natl Univ Dept Geophys 1 Gangwondaehak Gil Gangwon Do South Korea;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地震学;
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