机构地区: 河北省地震局
出 处: 《国际地震动态》 2006年第11期7-14,共8页
摘 要: “区域-时间-长度算法”(region-time-lengthalgorithm,简称RTL算法)是一种检测地震活动水平相对变化的计算方法,利用该算法对冀鲁豫交界地区1980年以来的ML5.0以上地震进行了回顾性检验,发现震前都达到了VRTL异常指标,说明该地区ML5以上地震前,地震活动水平相对于背景活动水平都有明显变化。通过RTL算法对异常进行量化,对以后该区的5级以上地震活动情况具有一定的预报能力。 Region-Time-Length algorithm is an examination method for relative change of earthquake activity level. The retrospective examination of earthquakes with ML ≥ 5.0 occurred in the border area of Hebei, Shandong and Henan Provinces has been carried out by using RTL method since 1980. It is found that the anomalous index VEreached the criterion before ML≥5.0 earthquakes, it means that seismic activity level change obviously compared with the background activity before the occurrence of ML ≥5.0 earthquakes. So, RTL method has capability in predicting earthquakes(ML≥5.0) in this area.