论文部分内容阅读
研究讨论了云南强震活动的时空特征,指出区内M≥68级地震呈现活跃与平静;主体活动区东西交替及时空轮回迁移等特征。据此指出1988年云南地区进入了M≥68级地震强震活跃期,主体地区在云南西部,1995—1997年存在发生6—7甚至7级以上地震的危险。同时讨论了孟连73级地震前相关区地震活动,滇西北、滇西南有关b值、小震频度、调制比异常等8种地震学异常的空间分布、时间进程等特征。特别指出了1994年9月至1995年5月滇西南地区M≥47级地震形成的时空密集现象,及其在短临阶段对震级及地点方面判断的重要作用。
The spatial and temporal characteristics of strong earthquakes in Yunnan are discussed and discussed. It is pointed out that M≥68 earthquakes in the area are active and calm, and the main activity areas are alternated between east and west and migrate in time and space. Based on this, it is pointed out that in 1988 Yunnan Province entered the active phase of the M≥68 earthquake and its main area lies in the western part of Yunnan Province. From 1995 to 1997, there was a danger of occurrence of earthquakes of magnitude 6-7 or even magnitude 7. At the same time, the spatial distribution and time course of eight seismological anomalies such as b value, frequency of small earthquakes and anomaly of modulation ratio are discussed in the seismic activity of the related area prior to the Menglian Ms73 earthquake and northwestern Yunnan and southwestern Yunnan. In particular, it is pointed out that the space-time intensive phenomenon formed by M≥47 earthquake in southwestern Yunnan from September 1994 to May 1995 and its important role in judging magnitude and location during the short and immediate phases.