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本文研究了1983年6月24日越南莱州7.0级地震前,云南境内所观测到的前兆异常,发现:震前2——3年云南西南部及其与越南、老挝、缅甸交界的相邻地区,M_L≥3.0级地震的半年频度及∑(t)曲线,分别出现三年和二年的高值异常;震前一年云南及邻区5.0≤M_s≤6.0级地震的年频度为平均年频度的二倍;震前两年,区内M_L≥4.0级的地震,构成北东向条带,并逐渐向未来大震震中移动,大震震中周围100——200公里范围内,构成中强震密集频发区;震前2个多月,云南境内震中距190——650公里范围内的部分地应力、水氧、水位、形变等前兆观测手段,先后出现异常,并具有分布范围大、不均匀、异常幅度和持续时间与震中距无线性关系等特征。作者用多源场孕震前兆模型对上述特征作了定性解释。
In this paper, the precursory anomalies observed in Yunnan Province before the M 7.0 7.0 earthquake in Vietnam on June 24, 1983 were studied. It was found that in the 2-3 years before the earthquake, the southwest of Yunnan and its adjacent areas with Vietnam, Laos and Myanmar , M_L≥3.0 earthquakes and the Σ (t) curves show three-year and two-year high anomalies respectively. The annual frequency of 5.0≤M_s≤6.0 earthquakes in Yunnan and its adjacent areas in the year before the earthquake was average Annual frequency of two times; two years before the earthquake, M_L≥4.0 earthquakes in the region constitute the northeast strip, and gradually move to the epicenter of the future earthquake, the epicenter of large earthquakes within 100-200 km range Moderate to strong earthquake frequency zone; before more than 2 months before the earthquake, epicenter in Yunnan Province 190 - 650 km range of partial stress, water oxygen, water level, deformation and other precursory means of observation, has abnormalities, and has a distribution range Large, inhomogeneous, anomalous amplitude and duration of the epicenter distance between the radio and other characteristics. The author made a qualitative explanation of the above characteristics by using the multi-source quarry precursor model.