【摘要】 本文通过分析2009年1月1日~4月5日意大利及周边地区中小地震的时空分布特征发现,2009年4月6日意大利拉奎拉地震是一次具有明显前震的中强地震。震前中小地震从频度和强度上在时间和空间向未来震中聚集的现象,为探索利用前震序列进行地震预测提供了较好的研究案例。更多还原

【Abstract】 The earthquakes occurring within Italy and its boundary areas from January 1 to April 5, 2009, show that the main earthquake at L’Aquila Earthquake on the morning of April 6, 2009 is a middle to strong earthquake with significant foreshocks. The enhancement of frequency and intensity of small earthquakes and their concentrating tendency to the future main shock have provided a comprehensive case for digging methods for earthquake forecasting with foreshocks.更多还原