昌平地震台地温前兆特征分析
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摘要
介绍了昌平地震台地温测点的基本情况及地温正常变化特征 .分析了该测点记录到的一些地震前的地温异常变化特征 .自 1 995年以来该测点观测到 1 1次异常 ,其中有 9次与发生在该台附近 (30 0km范围内 )的地震相对应 ,有 2次异常没有对应地震 .距离该测点较近的地震的异常形态为趋势下降 回升型 ;距离该测点较远的地震的异常形态为突跳型 .震前异常幅度越大 ,平静时间越长 ,未来地震的震级越大 ,反之则小 .以分为间隔的测值的异常明显优于以小时为间隔的测值异常
Basic condition of geotemperature observation of Changping seismic station and normal change of geotemperature by the station are introduced. Characteristics of anomalous geotemperature change before some earthquakes are analysed. The results show there are 9 ones to correspond to earthquakes occurred in a range of 300 km distant from Changping station among 11 anomalies in geotemperature data by the station since 1995. Anomalous shapes before earthquakes near by and distant the station are trend drop rise and sudden jump respectively. The larger the anomalous amplitude and the longer the quiet time, the larger the magnitude of coming earthquake.The anomalies in geotemperature data observed once a minute are more obvious than that observed once an hour.
Basic condition of geotemperature observation of Changping seismic station and normal change of geotemperature by the station are introduced. Characteristics of anomalous geotemperature change before some earthquakes are analysed. The results show there are 9 ones to correspond to earthquakes occurred in a range of 300 km distant from Changping station among 11 anomalies in geotemperature data by the station since 1995. Anomalous shapes before earthquakes near by and distant the station are trend drop rise and sudden jump respectively. The larger the anomalous amplitude and the longer the quiet time, the larger the magnitude of coming earthquake.The anomalies in geotemperature data observed once a minute are more obvious than that observed once an hour.
引文
[1] 黄祖彭 .单井异常指标的判定 [A].见 :国家地震局科技监测司 .地震预报方法实用化研究文集 (水位、水化专辑 ) [C].北京 :地震出版社 ,1990 .10 3— 10 7.
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