河南及邻区地震活动信息熵在中强地震前异常变化特征研究

历次中强地震发生前，孕震区附近的小震活动在时间上和空间上会出现从无序到有序的演化过程，反映了小震活动序列中隐含着许多与未来强震发生有关的重要信息。本文选取了河南及邻区小震活动资料，从系统的观点，利用地震活动信息熵值的变化探讨孕震体前后的某种整体行为。通过资料计算分析，河南及邻区中强地震前信息熵值的变化较为明显，中强地震一般发生在高熵值过后的下降段或恢复段，熵值的时序变化与地震序列具有较好的对应性；不同的地质构造地震活动差异，对熵值曲线的形态细节变化存在着一定影响，但对熵值总体变化趋势影响不大。

ANOMALOUS CHANgINg CHARACTERISTICS STUDy OF SEISMIC ACTIVITy INFORMATION ENTROPy BEFORE STRONg EARTHQUAKES IN HENAN AND ITS NEIgHBOR AREAS

Previous occurrence of strong earthquakes before the seismogenic zone near the small earthquakes in time and space will appear from disorder to order evolution reflects the sequence of small earthquakes and the future implicit in many of the occurrence of earthquakes important information. This paper selected Henan and neighboring small earthquakes data from the system point of view, the use of seismic activity information entropy values vary investigate seismogenic body after a certain overall behavior. Through the calculation and analysis, Henan and neighboring area before the earthquake information entropy values change more obvious, moderately strong earthquakes usually occur in high entropy after the descent stage and recovery section, entropy change and the timing of the earthquake sequence has good correspondence; different tectonic seismic activity differences, entropy curve shape changes in the details there is some influence, but does not affect the overall trend of entropy.