Full
WANG Xia, senior engineer, majors in seismicity activity and comprehensive prediction, E-mail: 365372858@qq.com
Outline
Based on the focal mechanism solutions of small earthquakes in Shanxi province since 2001, the time curve of 1D stress field is inverted. The results show that the azimuth angle change of the three main axes of the stress field in Shanxi province is generally stable, the plunge angles of σ1 and σ2 show synchronous reverse change, and the plunge angles of σ3 is nearly horizontal, revealing that the study area is a long-term stable horizontal tension structural stress field environment. From the temporal change of plunge angles, the stress field is divided into two periods including 2001-02-06 to 2008-12-19 and 2008-12-20 to 2023-07-31. The first period is the stress field of strike-slipping property, and the second period is the stress field of normal-fault property. During these two periods, most of the moderate earthquakes in Shanxi province match the corresponding stress field characteristics. The M9.0 earthquake in Japan, 2001 did not significantly change the stress field in Shanxi province.
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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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