乌什地震台倾斜固体潮观测与震兆异常

Observation of Tilt Earth Tide of Wushi Seismic Station and Earthquake Precursors

摘要:

选择新疆乌什台1988-2003年石英倾斜仪的记录为研究对象,利用经典的潮汐分析方法求解乌什地区的倾斜潮潮汐参量。对结果的分析认为:半主波潮汐参量的观测精度优于0.001,长期稳定性优于2%;在周围地区6级地震前可能记录到了γm2值的异常变化,但异常量级小于理论量级;水管倾斜仪的观测结果与石英倾斜仪的一致性很好,精度和稳定性更优于石英倾斜仪。

Abstract:

The records of quartz tilter in Wushi station during 1998-2003 are processed with classical method of tidal analysis,and the tilt tidal parameters are calculated.The results indicate that the observational precision of semidiurnal tidal parameters is less than 0.001;the long-term stability is prior 2%.The abnormal varieties of γm2 were recorded before ML≥6.0 earthquakes in neighboring region,but the magnitude of abnormality is less than theoretic value.The observational records of water tilter are well consistent with that of quartz tilter, the conforming precision and stability of water tilter is higher than quartz tilter.