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本文研究了不同地区的二十次大、中地震前的能量E的时空分布特征。结果发现有十二次地震在震中附近有个高能量区域,其外围有个低能量区域;有八次地震在震中周围只有低能量区域。E的这种区域分布半径有随主震震级增加而增加的趋势,并求出了其统计经验关系式。若将低能量区域所包围的区域范围视为主震在地壳内的孕震区,则可以确定各级地震孕震区域的大小。还发现E在该区域内随时间的变化是在主震前出现一个低能期,其低能期时间或总异常时间与主震震级大小有关。这种变化特征与震前b值出现的峰值期相一致。利用这种特征可能为预测地震的地点、时间、强度提供一定依据。总归一化频度N_0、最高震级也有E的类似变化现象。因此,b值、E、N_0、都有可能作为预测地震的标志量。
This paper studies the spatial and temporal distribution of energy E before the 20th and middle earthquakes in different regions. Twelve earthquakes found that there was a high-energy region near the epicenter and a low-energy region around the epicenter. There were eight earthquakes with low-energy regions around the epicenter. The distribution radius of this region of E tends to increase with the increase of mainshock magnitudes, and its statistical empirical relationship is obtained. If the region surrounded by low-energy region is regarded as the seismogenic region within the crust of the main shock, the magnitude of the seismogenic region at each level of earthquake can be determined. It is also found that the change of E in the region over time is a low-energy period before the main shock, and the low-energy period or the total abnormal time is related to the magnitude of the main shock. This change is consistent with the peak period before the b value. The use of this feature may provide a basis for predicting the location, time and intensity of earthquakes. The total normalization frequency N_0, the highest magnitude also has a similar change in E phenomenon. Therefore, the b value, E, N_0, are likely to serve as a marker for predicting earthquakes.