| 基于GRACE RL05数据探测苏门答腊Mw8.6地震的同震和震后形变 |
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| 引用本文： | 郑增记,曹建平,庄文泉,张永奇,范丽红.基于GRACE RL05数据探测苏门答腊Mw8.6地震的同震和震后形变[J].大地测量与地球动力学,2016,36(5):400. |
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| 作者姓名： | 郑增记 曹建平 庄文泉 张永奇 范丽红 |
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| 摘 要： | 利用美国德克萨斯大学空间研究中心（UTCSR）最新发布的GRACE卫星RL05月重力场模型数据，采用去相关和300 km半径的高斯平滑滤波，提取出2012年苏门答腊MW8.6地震的同震和震后形变，并利用最小二乘拟合方法计算了地震前后震中附近区域的形变率。结果表明，GRACE卫星观测到的同震形变约为-8~14 cm，震前和震后震中附近区域的形变率分别为1~4 cm/a和-1~-3 cm/a。
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| 关 键 词： | GRACE 苏门答腊MW8.6地震 同震和震后形变 |
Co-seismic and Post-seismic Deformation of the Sumatra Mw8.6 Earthquake Detected by GRACE RL05 Data |
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| ZHENG Zengji,CAO Jianping,ZHUANG Wenquan,ZHANG Yongqi,FAN Lihong.Co-seismic and Post-seismic Deformation of the Sumatra Mw8.6 Earthquake Detected by GRACE RL05 Data[J].Journal of Geodesy and Geodynamics,2016,36(5):400. |
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| Authors: | ZHENG Zengji CAO Jianping ZHUANG Wenquan ZHANG Yongqi FAN Lihong |
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| Abstract: | The latest UTCSR GRACE RL05 monthly gravity field models were processed by using de-correlation and 300 km radius Gaussian smoothing, and the co-seismic and post-seismic deformations of the Sumatra MW8.6 earthquake are extracted successfully for the first time. Pre-seismic and post-seismic deformation rates around the epicenter are calculated by using least squares. The results show that co-seismic deformation of about -8－14 cm, pre-seismic deformation rates of about 1－4 cm/a and post-seismic deformation rates of about -1－-3 cm/a can be detected by GRACE satellite gravity surveying. |
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| Keywords: | GRACE Sumatra MW 8 6 earthquake co-seismic and post-seismic deformation |
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