宁陕地震台体应变仪观测质量及映震能力分析

选取2016—2020年宁陕地震台TJ-Ⅱ型体积式钻孔应变仪观测资料，基于观测质量和映震能力，系统分析应变仪运行状况及地震监测效能。结果表明：该台体应变观测资料质量整体较好，但数据连续率及完整率尚有待提升；体应变仪映震能力较强，可记录国内M_S≥7.0和国外M_S≥7.4地震；同震形变响应分析结果表明，同震响应最大变幅与震中距满足A = ae^{blg D}的负相关关系，与震级满足A = ae^bM的正相关关系。

Analysis of observation quality and earthquake-reflecting capability of volume borehole strain meter at Ningshan Seismic Station

Based on the observation data of TJ-Ⅱ volume borehole strain meter at Ningshan Seismic Station from 2016 to 2020,the operation status and earthquake monitoring efficiency were systematically analyzed from observation quality and earthquake-reflecting capability.The results show that the quality of observation data of Ningshan volume borehole strain meter is better,but the continuity and integrity of observation data need to be further improved;Ningshan volume borehole strain meter had strong earthquake-reflecting capability,all the earthquakes with M_S ≥ 7.0 in China and M_S ≥ 7.4 outside China can be recorded;the co-seismic response results show that there is a negative correlation between the maximum response amplitude and epicentral distance,and a positive correlation between the maximum response amplitude and magnitude.