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利用地震观测资料预测地震的方法称为以震报震。以震报震是基于这样的设想:地震活动的时、空、强分布图像及地震波的特征是地壳应力场的反映。因此,试图通过对已发生的地震的分析,窥测地应力场的状态,寻找大地震前由震源区附近应力的集中、增强而产生的某些震兆。这方面包括有:(1)由频度—震级关系lgN=a-bM导出的b值预测法。式中N为一定震级区间内的地震数目,M为震级,a、b是常数。这一形式表示大小地震是按一定的关系发生的。一般说每个地震活动区都有其自身的正常b值,标志该区
The method of using seismic data to predict earthquakes is known as earthquakes. Earthquake-based earthquake reporting is based on the assumption that the temporal, spatial and strong distribution of seismicity and the characteristics of seismic waves are a reflection of the crustal stress field. Therefore, we try to peek at the state of the geostress field by analyzing the earthquakes that have occurred and find some earthquakes produced by the concentration and enhancement of the stress near the focal area before the earthquake. This includes: (1) The b-value prediction method derived from the frequency-magnitude relationship lgN = a-bM. Where N is the number of earthquakes within a certain magnitude interval, M is the magnitude, and a and b are constants. This form shows that large and small earthquakes happen in a certain relationship. Generally speaking, each seismic activity zone has its own normal b value, marking the area