Full
YANG Yahui, engineer, majorsin mobile gravity observationtechnology, E-mail: 1143950457@qq.com .
Outline
Based on the mobile gravity data from Hebei province and its neighboring areas, we select the 2016-06-23 Shangyi MS4.0, 2017-09-04 Lincheng MS3.7, 2018-02-12 Yongqing MS4.3, and 2019-12-05 Fengnan MS4.5 earthquakes to analyze dynamic changes of gravity field. Combining with geological structure information, we investigate the relationship between seismicity and gravity changes. The results show that: 1) For earthquakes of approximately M4, significant pre-seismic changes of gravity field are observed, with notable positive and negative anomaly high-value areas and high-gradient zones, suggesting potential precursor information. 2) Earthquakes tend to occur near fault. The direction of contour lines of high-gradient zones of gravity field is mostly consistent with the orientations of major active fault in the region, indicating a close relationship between earthquakes occurrence, gravity changes, and fault structures. 3) The physical parameters of subsurface media are important for earthquake occurrence. Therefore, it is essential to integrate other disciplines for comprehensive assessments when conducting earthquake prediction.
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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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