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Outline
We construct daily line-of-sight gravity difference (LGD) series at 5-second intervals using GRACE inter-satellite ranging data and extract LGD anomalies over earthquake regions. Using the 2004 Sumatra MW9.1 and 2011 Tohoku MW9.1 earthquakes as case studies, the results confirm that the LGD method can effectively detect coseismic gravity changes within several days after earthquake, and significantly improve temporal resolution. The observed LGD and theoretical LGD peaks show excellent agreement, with absolute differences no more than 0.8 nm/s2 (Sumatra earthquake) and 2.5 nm/s2 (Tohoku earthquake). This study demonstrates that LGD-based earthquake monitoring offers high speed and accuracy, providing a new technical approach for investigating large-scale mass migration processes caused by seismic events.
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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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