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前言滇西地震带历史上多次发生强震,近年来小震活动频繁,又多次发生中强震,一直为我省的重点监测区。1982年7月和10月位于该地震带中部的剑川洱源地区相继发生5.3级和5.2级地震,发震地区近年来很少3级以上地震活动,也是中强震活动的空区。这两个地震的孕育过程如何?它们在滇西地震带地震活动发展过程中的地位怎样?以及是否会引起更强烈的地震响应?我们从以下几个方面进行了一些初步探讨。
Preface The western Yunnan earthquake belt has occurred many times in the history of strong earthquakes. In recent years, the small earthquakes have been frequent and the medium-strong earthquakes have occurred many times, which has been the key monitoring area in our province. In July and October 1982, 5.3 and 5.2 earthquakes occurred successively in the Jianchuan-Eryuan area in the central part of the seismogenic zone. The seismogenic areas are seldom above Grade 3 in recent years and are also empty areas for moderate-strong earthquake activities. How are the earthquakes during these two earthquakes, what is their role in the seismic activity in western Yunnan, and whether it will lead to a stronger earthquake response? We have made some preliminary discussions in the following aspects.