【摘要】 在2008年5月12日汶川8.0级地震前后,西安基准地震台体应变观测资料出现显著的异常变化。对引起此异常可能的原因进行分析,其一,在异常出现时,台站附近在建筑施工;其二,在其他时段也出现过两次与汶川地震前后相似的异常,是由仪器原因引起。但鉴于异常变化与汶川8.0级地震在时间上的一致性,幅度上的显著性和形态上与一般震例的相似性,故认为,西安台体应变观测资料出现此异常可作为汶川8.0级地震前后的疑似地震异常来处理。更多还原

【Abstract】 The body strain observation data at Xi’an reference seismological station showed obvious changes before and after the May 12th,2008 Wenchuan earthquake.The possible reasons for causing these anomalies are analyzed.Firstly,the construction work near the station was continuing while the anomaly appeared.Secondly,the similar anomalies also appeared twice in other periods,which were caused by instruments.Considering the time consistency of anomalous variation with Wenchuan M8.0 earthquake,the notability of variation amplitude and shape comparability with earthquake cases,the anomalies of body strain observation data at Xi’an seismological station are believed to be suspected earthquake precursor of Wenchuan earthquake.更多还原