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近年来,国内外地震学者对地震活动图象的研究产生了新的兴趣,特别是地震异常活动图象之一“地震活动空区”的探讨更为活跃。1970年1月5日通海发生7.7(Ms)级地震之前,中强震活动的时空图象出现了有趣的变化。 分析通海地区(北纬23.5°-24.5°,东经102°-103.1°,图1)1910年以来历史地震的时空分布,发现有如下规律:1913年峨山大震后到1939年6月,共发生(M_s≥4.7)地震6次,平均发生0.23次/
In recent years, seismologists at home and abroad have brought new interest in the study of seismicity images. In particular, the discussion on “seismic active space”, one of the anomalous seismic anomalies, is more active. Before the occurrence of the 7.7 (Ms) earthquake on January 5, 1970 in the sea, there was an interesting change in the temporal and spatial images of moderate-strong earthquakes. Analysis of the spatial and temporal distribution of historical earthquakes in the Tonghai area (latitude 23.5 ° -24.5 °, longitude 102 ° -103.1 °, east longitude) since 1910 reveals the following regularity: after the Ascent earthquake in 1913 to June 1939, a total of M_s≥4.7) earthquakes 6 times, an average of 0.23 times /