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Outline
Based on the observational data of two types of borehole strainmeters at Xuzhou seismic station, we use the R-value test method to calculate and score the forecasting efficiency of trend-breakinganomalies, annual breaking anomalies and rate anomalies recorded by the two instruments. A systematic 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 results show that the borehole body strainmeter performs well in the forecasting of trend-breaking anomalies and annual breaking anomalies, and is suitable for capturing the earthquake precursor anomaly 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 geological 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 monitoring and provide the application focus and optimization direction of the two types of borehole strainmeters in earthquake forecasting.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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