中国大陆23个震例流体异常时空分布特征研究

Research on characteristics of spatio-temporal fluid anomalous distribution of 23 earthquake cases in China′s mainland

将1966-1999年中国大陆发生的188例Ms≥5．0地震震例中，单次震例流体异常项数≥10项的23次地震的446项流体异常取出，并将其按时序和分区进行时、空分布统计分析。结果表明，除西北地区与震例相关的流体异常数量明显偏少外，在西南、华北、东南3个地区，不论是按时序还是按分区的时、空统计，都有较为清晰的各自阶段性；与中国震例中流体异常的总体分布特征和各自分区异常分布特征之间有较好的一致性。

Among 188 Ms≥5.0 earthquakes occurred in chings mainland from 1966-1999, 446 fluid anomalies are recognized from 23 earthquake cases in which the fluid anomaly terms for each case are lager than or equal to 10. Then spatio-temporal distribution is sta- tistically analyzed according to time sequences and space zones. The results hold that the stage character is obvious observed in Southwest China, North China, and Southwest China, in spite of time sequences or space zones. On the contrary, in Northwest China fluid anomalies concerned earthquake case are less recognized. The results accord well with the integrated distribution characteristics of fluid anomalies and the regional anomalous distribution characteristics of earthquake cases in China.