| 1998年1月10日张北-尚义6.2级地震前昌平地震台应变资料的异常变化分析 |
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| 引用本文： | 王勇,刘福生,张国红,张学政.1998年1月10日张北-尚义6.2级地震前昌平地震台应变资料的异常变化分析[J].西北地震学报,1999,21(3):274-279. |
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| 作者姓名： | 王勇 刘福生 张国红 张学政 |
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| 作者单位： | 中国地震局地壳应力研究所 |
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| 基金项目： | 中国地震局地壳应力研究所论著编号:1999B0003 |
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| 摘 要： | 分析了昌平地震台体应变、线应变及差应变等观测资料在１９９８年１月１０日张北－尚义６．２级地震前的异常变化。结果表明：该次地震前昌平台的应变观测资料出现了明显的趋势异常；体应变的异常时间与震级有较发的相关性；差应变资料显示了短临异常；由线应变资料计算的主应变方向在地震前逐渐向震中偏转；Ｍ２波潮汐因子也出现了明显的异常变化。
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| 关 键 词： | 体应变 应变分析 趋势异常 临震异常 潮汐因子 |
| 收稿时间： | 1999/1/20 0:00:00 |
ANALYSISON ANOMALIES OF STRAIN DATA OBSERVED AT CHANGPING SEISMIC STATION PRIOR TO THE ZHANGBEI-SHANGYI MS 6.2 EARTHQUAKE ON JAN. 10, 1998 |
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| WANG Yong,LIU Fu-sheng,ZHANG Guo-hong and ZHANG Xue-zheng.ANALYSISON ANOMALIES OF STRAIN DATA OBSERVED AT CHANGPING SEISMIC STATION PRIOR TO THE ZHANGBEI-SHANGYI MS 6.2 EARTHQUAKE ON JAN. 10, 1998[J].Northwestern Seismological Journal,1999,21(3):274-279. |
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| Authors: | WANG Yong LIU Fu-sheng ZHANG Guo-hong and ZHANG Xue-zheng |
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| Institution: | Institute of Crust Dynamics, CSB, Beijing 100085, China,Institute of Crust Dynamics, CSB, Beijing 100085, China,Institute of Crust Dynamics, CSB, Beijing 100085, China and Institute of Crust Dynamics, CSB, Beijing 100085, China |
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| Abstract: | The anomalous changes in data of borehole strain measurement at Changping station before the Zhangbei-Shangyi MS6.2 earthquake on Jan. 10, 1998 are analysed. The results show that trend anomalies in the data before the earthquake are obvious. Continuous time of the anomalies of body strain has a good relation to the mag nitude. The short-term and imminent anomalies in differential strain data have arisen. Orientation of principle strain calculated from linear strain data turned gradually towards the epicenter before the earthquake. The relationship between the anomalous changes of tide factor in body strain data and the earthquake is studied. |
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| Keywords: | Body strain Strain analysis Trend anomaly Short-impending anomaly Tidal factor Orientation of principle strain Zhangbei-Shangyi earthquake |
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