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In response to the current inability of the strong-motion observation network to provide seismic input records covering all areas of the epicenter vicinity, a technical framework for the rapid generation of kilometer-grid strong motion time histories has been established. Taking the MS6.8 earthquake in Dingri, Xizang on January 7, 2025, as an example, the detailed processes of each technical procedure are described, and work on the inversion of the source rupture process, estimation of regional site conditions, and simulation of strong motion time histories has been carried out. The following results are obtained. The earthquake released a seismic moment of 4.7×1019 N•m, corresponding to a moment magnitude of 7.05. The fault slip is predominantly normal with a small amount of left-lateral strike-slip component, and the maximum slip displacement exceeded 3 meters. The rupture lasted for more than 20 seconds, mainly propagating in the northward direction, which may cause potential directivity effects. A VS30 distribution map and engineering site classification map with a resolution of 30 arcseconds are provided, and the sites in the vicinity of epicenter area are mainly classified as ClassⅠand ClassⅡ, with VS30 values ranging from 260 m/s to 510 m/s in the majority of the southeast area. Simulated three-component acceleration time histories for 14 996 virtual observation points in the near-field area (27°30′N~30°00′N、86°18′E~88°36′E) are provided, and the accuracy of the simulation results is verified by actual observation records. The maximum horizontal peak ground acceleration(PGA) can reach 1.0 g, and the 0.4 g and 0.2 g isolines approximately coincide with the IX and Ⅷ isoseismals, while the 0.10 g and 0.05 g isolines enclose areas slightly smaller than the Ⅶ and Ⅵ isoseismal zones. This research work and its results can provide reasonable seismic input for the damage identification, disaster evaluation, and resilience assessment of various disaster-bearing bodies in the epicentral area.
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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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