徐州地震台同场地钻孔应变仪器预报效能对比分析OA

Based on the observational data of two types of borehole strainmeters at Xuzhou seismic sta-tion,we use the R-value test method to calculate and score the forecasting efficiency of trend-breaking anomalies,annual breaking anomalies and rate anomalies recorded by the two instruments.A system-atic comparative analysis of the forecasting efficiency of the two borehole strain instruments at the same site is conducted to clarify their complementarity in earthquake precursor monitoring.The re-sults show that the borehole body strainmeter performs well in the forecasting of trend-breaking a-nomalies and annual breaking anomalies,and is suitable for capturing the earthquake precursor anom-aly signals related to long-term geological tectonic activities.The borehole component strainmeter shows a strong ability in the forecasting of trend-breaking anomalies and rate anomalies,and is more adept at capturing the trend-breaking precursor anomaly signals caused by stress state changes of geo-logical body,and has high sensitivity for the monitoring of rapid changes in regional stress and strain.These findings reveal the efficiency differences of borehole strainmeters in earthquake precursor moni-toring and provide the application focus and optimization direction of the two types of borehole strain-meters in earthquake forecasting.