【摘要】 以2004年内蒙古东乌珠穆沁旗Ms5.9地震为研究对象,对震中区域的地震活动参量b值进行时间扫描计算,Ms5.9地震前b值表现为高值回落;在选取的时空范围内,计算出震中区域平均波速比和地震空间相关长度,Ms5.9地震前波速比变化过程为下降持续低值一回升发震,地震空间相关长度在震前趋势性上升,分析认为:可以把波速比的和地震空间相关长度的震前变化规律作为同一区域未来地震的预测依据。更多还原

【Abstract】 Taking the Dong Ujimqin Qi M_S 5.9 earthquake as the study object,We calculate the time sweep curves of 6-value,then analyze their anomaly before the M_S 5.9 earthquake.Base on the selected temporal-spatial range,we calculate velocity ratio(V_P/V_S) and correlation length of epicenter region,then discuss their variety trend before earthquake:the variety course of velocity ratio(V_P/V_S) is descend-keep low value-rally,the variety course of correlation length had ascending trend.So we consider that the variety laws of velocity ratio(V_P/V_S) and correlation length may be a forecast basis before future earthquakes which will occur in the same area.更多还原