云龙地震台应变潮汐观测资料质量分析

对云龙地震台SS-Y型石英伸缩仪2003—2016年应变潮汐观测资料质量进行全面评定，结果显示：应变潮汐观测资料连续，仪器运行状况稳定，年零漂、年变幅小，噪声水平低，M₂波潮汐因子相对中误差小，以上各项评定指标均满足形变规范要求，观测资料质量达到国内优秀水平。云龙地震台应变潮汐长系列调和分析结果可为本区域固体潮正常背景变化、地震前兆异常信息识别及地震预测研究提供参考。

Quality analysis of strain tide observation at Yunlong Seismic Station

Strain tide observation data at Yunlong Seismic Station from 2003 to 2016 were applied to conduct a com-prehensive quality and long-term stability assessment. Results showed that strain tide observation data of Yunlong Seismic Station during 14 years were continuous. The equipments kept stable. Data zero drift of years and annual variation were small. The relative noise level was low. Tide factor of M₂ wave and its relative error were small. Above five evaluation indicators had meet the requirements for deformation specifications. The quality of observation data had reached the domestic leading level. The results could provide a reference value for the variation information of solid tide background, precursory anomaly identification and earthquake prediction research.