【摘要】 当前作为强震前的典型特征,临界阶段地震活动的相关长度增长及主震周围矩释放加速(AMR)现象近年来受到广泛关注及普遍认可。但近期部分震例研究显示,在震中周围的大尺度范围内检测到矩释放加速的现象,而在震中附近较小区域又可检测到矩释放减速的现象。该文拟对地震活动相关以及临界状态的研究状况,主震前震区周围大范围矩释放加速和小范围矩释放减速定量化检测的国内外研究状况以及研究中所存在的问题作了综述。更多还原

【Abstract】 As the typical characteristics before strong shocks,the earthquake activities of critical moment and phenomena of accelerating earthquake moment release around main earthquakes have been attended these years.Some researches have lately showed that there are the phenomena of accelerating earthquake moment release in the wide area around the epicenter and the phenomena of decelerating earthquake moment release in the narrower region around the epicenter.Here the authors briefly summarize the status of the research and existing problems at home and abroad: the critical state of seismic activities and phenomena of accelerating and decelerating earthquake moment release before the mainshock.更多还原