| 中强地震前周至台地电阻率的异常变化 |
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| 引用本文： | 彭玉柱,张世民,李建章.中强地震前周至台地电阻率的异常变化[J].震灾防御技术,2015,10(2):455-463. |
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| 作者姓名： | 彭玉柱 张世民 李建章 |
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| 作者单位： | 陕西省地震局周至地震台,周至 710402;陕西省地震局周至地震台,周至 710402;陕西省地震局周至地震台,周至 710402 |
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| 摘 要： | 通过对三个震例的分析,笔者得到了周至台地电阻率观测在地震发生前出现的一些异常变化。其具体表现为:1在汶川地震发生前,周至台地电阻率观测在三个测向的日均值都呈缓慢下降,幅度为1.0%—3.9%,从异常变化出现至发震的时间间隔为1月左右。2在芦山地震和岷县漳县地震发生前,从2011年9月开始,周至台地电阻率观测在三个测向的日均值都呈显著下降且幅度较大。其中,芦山地震发生在异常变化恢复(上升)的过程中,从出现异常到发震的间隔为16个月;而岷县漳县地震也发生在异常恢复(上升)的过程中,但从异常出现到发震的间隔为19个月。表明周至台地电阻率观测能较好地反映出地震的前兆信息,具有一定的映震能力,这对陕西及相邻地区的地震监测和预报可以起到一定的作用。
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| 关 键 词： | 地电阻率 异常特征 观测条件 地震 |
| 收稿时间： | 4/9/2015 12:00:00 AM |
Precursory Anomalies of Geo-Resistance before Moderate-Strong Earthquake Based on Observed Data at Zhouzhi Seismic Station |
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| Peng Yuzhu,Zhang Shimin and Li Jianzhang.Precursory Anomalies of Geo-Resistance before Moderate-Strong Earthquake Based on Observed Data at Zhouzhi Seismic Station[J].Technology for Earthquake Disaster Prevention,2015,10(2):455-463. |
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| Authors: | Peng Yuzhu Zhang Shimin and Li Jianzhang |
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| Institution: | Zhouzhi Seismic Station, Earthquake Administration of Shaanxi Province, Zhouzhi 710402, China;Zhouzhi Seismic Station, Earthquake Administration of Shaanxi Province, Zhouzhi 710402, China;Zhouzhi Seismic Station, Earthquake Administration of Shaanxi Province, Zhouzhi 710402, China |
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| Abstract: | Observed geo-resistance data at Zhouzhi seismic station were processed. We analyzed the data related to three strong earthquakes including Wenchuan MS8.0 earthquake and summarized the character of precursory anomalies before moderate-strong earthquake. The results show it will appear precursory anomalies before moderate-strong earthquake in adjacent area, and the outcome will provide important basis for earthquake research and prediction, and provide preference for forecasting earthquake activity around Zhouzhi station. |
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| Keywords: | Geo-resistance Anomaly character Observed condition Earthquake |
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