溧阳体应变观测资料综合分析

江苏省溧阳体应变自1994年开始观测以来，经历了1994年至2000年以整点值为主的模拟观测，和2001年至今以分钟值为主的数字化观测两个阶段，对这两个观测阶段观测资料变化形态、观测质量和观测精度、潮汐因子中误差、地震波记录能力等参数进行对比研究，同时采用固体潮汐残差矢量分析方法，对溧阳台1996年以来的观测资料进行了计算分析。结果表明：①溧阳台数字化观测和模拟观测资料的形态、观测精度、方差、潮汐因子中误差、相位滞后等参数无显著差异；影响观测资料精度的主要因素是仪器故障、水位、气压、气温等；②溧阳体应变固体潮汐残差矢量对1996年11月9日长江口6．1级地震异常特征明显，映震效果显著。

Comprehensive analysis of body strain observation in Liyang Seismic Station

Body strain observation in Liyang Station, Jiangsu Province since 1994 to present had come through two stages that are analogue observation with hour- values from 1994 to 2000 and digitized observation with minute - values from 2001 to present. We have compared and analyzed some parameters, such as variation forms of observation data, observation quality,observation precision, median error of tidal factor and response ability to earthquake wave. At the same time, we have calculated observation data since 1996 in Liyang Seismic Station by use of residual vector method of solid tide. The results show that the parameters have no obvious differences between digital observation data and analogue observation in data form, observation precision, variance, median error of tidal factor and phase lag. The factors of influences precision of observation data are mainly instrument failure, water level, atmospheric pressure and air temperature. Residual vector of solid tide of body strain in Liyang Seismic Station exist obvious abnormal feature and reflecting effect to the earthquake of magnitude 6.1 occurred in Changjiang opening on the ninth of December, 1996.