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利用云南省及其邻区1965至1985年 M≥3.0级地震资料,对地震的频度、应变释放、b值、断层面总面积、震情指数按时间进行滑动计算,发现21年中发生的8次6.5级以上地震,震前都出现了不同程度的异常。本文给出这些异常的经验指标,并对其报准、报虚、漏报等情况给予评定,用双概率检验给出其准确率。通过震中分布图可以看出,在6.5级以上大震之前,往往形成全省性的中强震活动条带或活动密集区,大震就发生在这些地带上。
Based on the M≥3.0 seismic data from 1965 to 1985 in Yunnan Province and its adjacent areas, the frequency, strain release, b value, total fault area and earthquake index of the earthquake were calculated by time and found that the occurrence of Eight times more than 6.5 earthquakes, there have been different degrees of anomalies before the earthquake. This paper gives the empirical indicators of these anomalies, and its registration, reported false, omissions and other conditions given assessment, with double probability test gives its accuracy. According to the epicenter distribution map, it can be seen that before the great earthquake of magnitude 6.5 or above, the provincewide strong earthquake activity belt or activity intensive area often formed, and the great earthquake occurred in these areas.