| 岷县-漳县M6.6地震前后的形变范数变化特征 |
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| 引用本文： | 许康生,曾文浩.岷县-漳县M6.6地震前后的形变范数变化特征[J].大地测量与地球动力学,2017,37(9):884-887. |
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| 作者姓名： | 许康生 曾文浩 |
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| 摘 要： | 采用分布在南北地震带上10个洞体应变台的观测资料，基于小波分解和范数计算，提取2013-07-22甘肃岷县-漳县M6.6地震前异常信息。结果表明，除肃南台外，其余9个台均出现震前异常信息，昭通台、小庙台最早出现异常，在2013-06初（约在震前50 d），距震中最近的宕昌台在7月初出现异常。结合其他学者的研究，对异常信息特征进行讨论认为，这次地震与南北地震带东侧块体自南向北运动有密切关系，而震后的形变传递过程是一个反向过程。同时也证明，用范数计算方法提取震前形变异常是简单、有效和可靠的。
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| 关 键 词： | 岷县-漳县地震M6.6 形变 小波分解 范数 南北地震带 |
The Characteristics of Deformation Norm Changes before and after the Minxian-Zhangxian M6.6 Earthquake |
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| XU Kangsheng,ZENG Wenhao.The Characteristics of Deformation Norm Changes before and after the Minxian-Zhangxian M6.6 Earthquake[J].Journal of Geodesy and Geodynamics,2017,37(9):884-887. |
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| Authors: | XU Kangsheng ZENG Wenhao |
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| Abstract: | Using the observation data from 10 North-South seismic belt hole strain stations, based on wavelet decomposition and norm calculation, we acquire anomaly information from the Minxian-Zhangxian earthquake M6.6 (Jul.22,2013). The results show, in addition to Sunan station, the rest of the 9 stations present anomaly information before the earthquake. The earliest anomalies occur in early Jun 2013 (about 50 days before the earthquake); at Dangchang station, which is nearest to the epicenter, anomalies occur in early July 2013. Combined with other research results, the characteristics of abnormal information are discussed. We believe that there is a close relationship between it and the movement of eastern side from south to north in South- North seismic belt. The deformation transfer process after the earthquake is a reverse direction process. In addition, it is proved that the method is simple, effective and reliable to extract the deformation anomaly before the earthquake. |
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| Keywords: | Minxian-Zhangxian earthquake M6 6 deformation wavelet decomposition norm south-north seismic belt |
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