六合(冶山)体应变观测质量评价和映震效能研究

An evaluation of data quality and earthquake sensitivity of Liuhe (Yeshan) volumetric strain observation station

南京市六合(冶山)台体应变仪于2002年8月安装并投入观测。观测资料连续率99.11%以上,年变幅和月平均速率趋于稳定态势。对不同距离的地震均有异常反映,2005年11月26日江西5.7级地震前异常显著。

A volumetric strainmeter was installed in Liuhe (Yeshan) station of Nanjing city and started to operate from August of 2002. The recovery rate of continuous observation data is above 99.11%.The annual and monthly average variations tend to reach a stable state.It showed anomalous variations to earthquakes at different distances.Before the M5.7 Jiangxi earthquake of Nov.11, 2005, the anomaly was remarkable.