【摘要】 分析了1974年以来东南沿海地震带西段发生的MS≥4.9级地震前地震活动性总体状态参量Rt的变化特点,同时对Rt值在东南沿海地震带西段的地震预测效能进行了检验评估。结果表明,当Rt>0.82时,表明东南沿海地震带西段地震活动状态比较正常,发生4.9级以上地震的概率较低;反之,当Rt≤0.82时,则表明东南沿海地震带西段地震活动比较活跃,发生4.9级以上地震的概率较大。更多还原

【Abstract】 We have studied the characteristics of the integrated parameter Rt of seismic activity before MS ≥ 4.9 earthquakes occurred around the west section of the southeast coastal seismic belt since 1974.The efficiency of earthquake prediction by the Rt parameter has also been evaluated.It′s indicated that when Rt > 0.82,the seismic activity is stable and the probability of M > 4.9 earthquake is lower around the west section of the southeast coastal seismic belt,otherwise,the seismic activity is more active and the probability is higher when Rt ≤ 0.82.更多还原