地磁加卸载响应比方法应用初探

以新疆地磁观测资料为基础，采用加卸载响应比方法进行回顾性研究发现，若响应比值P（Z）≥4.1，则在喀什周边地区有可能与1－11个月以后的地震有较好的对应。响应比值一般在震前1－11个月出现最大异常，个别地震在震前几天或发震同日出现；并且高响应比值对应的地震震级相对较高。乌鲁木齐的地磁响应比值异常并不意味着一定有中强地震对应，它主要反映了构造应力的变化。

APPLICATION OF LOADING/UNLOADING RESPONSE RATIO TO GEOMAGNETISM

Loading/Unloading response ratio method was applied to studying the geomagnetic observational data in Xinjiang in this paper. It is found that (1) if the response ratio P(Z) is equal to or greater than 4.1, it is possible to have a good response to an earthquake around Kashi after 1 11 months;(2)the maximum P(Z) value anomaly usually appears in 1 11 months before the event, and only on one or two cases ,the maximum P(Z) appears in a few days before the quake or in the same day of the quake;(3)the higher P(Z) is, the higher the responsed magnitude is; (4)that geomagnetic response ratio shows anomalous doesn't mean that there must be moderate strong earthquakes responding, which is mainly a reflection of the variation of tectonic stress field.