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Outline
Utilizing continuous observation data from 41 strong-motion stations and 20 China Mobile Beidou CORS stations near the epicenter of the M6.8 Dingri, Xizang earthquake on January 7, 2025, this study systematically evaluates seismic intensity distribution and co-seismic surface deformation characteristics. Results indicate that the maximum instrumental intensity reached 8.0 degree, with significant spatial attenuation (1.67 degrees per 100 km) and anisotropy (isoseismal major axis trending nearly N-S). High-precision co-seismic deformation fields near the epicenter were accurately obtained through Beidou static undifferenced PPP and double-difference baseline network solutions, combined with a dual-epoch median displacement differencing method. Discrepancies with GPS observations were at millimeter level. The Beidou high-dynamic PPP mode effectively captured centimeter-level transient deformation signals. Furthermore, spatial patterns of co-seismic displacement fields from Beidou observations align with theoretical rupture model simulations, consistently demonstrating horizontal expansion west and east of the epicentral area and convergence toward the epicenter from the northern sector.
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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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