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| 武都地电阻率在岷县5.2级地震前的异常变化 | |
| 引用本文： | 高曙德,苏永刚,王君平,郝臻,王军燕,赵洁.武都地电阻率在岷县5.2级地震前的异常变化[J].地震,2005,25(2):115-121. |
| 作者姓名： | 高曙德 苏永刚 王君平 郝臻 王军燕 赵洁 |
| 作者单位： | 1.甘肃省武都中心地震台, 甘肃 武都 746000; 2.甘肃省地震局, 甘肃 兰州 730000; 3.甘肃省嘉峪关地震台, 甘肃 嘉峪关 737000 |
| 摘 要： | 2003年11月岷县5.2级地震前武都台地电阻率资料出现了明显前兆异常, N85°E测道电阻率资料出现了典型的“勺形”变化, N73°W测道电阻率自2002年5月打破正常年变化形态, 2003年8月开始急剧升高。 研究结果认为, 从出现地电阻率异常到发震, 两测道各向异性变化明显, 各向异性度S′最大变化量超过了正常年变化的二倍。 |
| 关 键 词： | 岷县MS5.2地震 地电阻率异常 地下水 各向异性度S′ |
| 文章编号： | 1000-3274(2005)02-0115-07 |
| 收稿时间： | 2004-06-28 |
| 修稿时间： | 2004年6月28日 |
Geoelectric anomalies at Wudu station before Minxian MS5.2 earthquake |
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| GAO Shu-de,SU Yong-gang,WANG Jun-ping,HAO Zhen,WANG Jun-yan,ZHAO Jie.Geoelectric anomalies at Wudu station before Minxian MS5.2 earthquake[J].Earthquake,2005,25(2):115-121. | |
| Authors: | GAO Shu-de SU Yong-gang WANG Jun-ping HAO Zhen WANG Jun-yan ZHAO Jie |
| Institution: | 1. Wudu Seismological Station, Wudu 746000, Gansu; 2. Earthquake Administration of Gansu Province, Lanzhou 730000; 3. Jiayuguan Seismic Station, Jiayuguan 737000, Gansu, China |
| Abstract: | the earth resistivity data show an obvious anomaly at Wudu station before Minxian MS5.2 earthquake in November 2003. A typical scoop-like variation appeared for the N85°E geoelectric configuration. The regular year variation feature is broken from May 2002, and the value of N73°E configuration rapidly rises from August 2003. The research result indicates that the anisotropic variations of them are remarkable from the time when the anomalies appeared to the time when the earthquake occurred. The maximum change of anisotropic index S′ is more than tow time of the value of regular year variation. |
| Keywords: | Minxian MS5 2 earthquake Earth resistivity anomaly Groundwater Anisotropic index S′ |
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