PEI Dongyang, engineer, majorsin earthquake prediction, E-mail: pdy265@sina.com
Based on continuous waveform data from the MS4.7 earthquake in Ar Horqin Banner on October 15, 2021, for three months post-earthquake, machine learning methods were utilized for picking earthquake phases and associating them. The preliminary machine learning-based earthquake catalog constructed includes 386 seismic events, which is 17 times the number of events in the manual catalog of the Inner Mongolia seismic network for the same period. Subsequently, using the P/S phase arrival time information from the event waveforms, a double-difference location method was applied to precisely locate the aforementioned aftershocks and study the seismogenic structure of the earthquake. The results indicate that the aftershocks of the MS4.7 earthquake in Ar Horqin Banner have two main directions of distribution, nearly NW and nearly NEE, within a 1-5 km range around the mainshock. Based on the relocation results and combined with linear geological structures on the topography, it is suggested that there exists an unidentified hidden faults. The distribution of the 4.7 magnitude earthquake and its aftershocks is primarily controlled by the nearly NW-oriented hidden faults and the nearly NEE-oriented structures.
| 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 |