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分析了尼泊尔M_W8.1地震引起的中国大陆井水位同震响应变化特征,并利用同震水位阶变量反演中国大陆震时应力调整状态。结果显示,尼泊尔M_W8.1地震引起中国大陆井水位的同震响应主要表现为振荡型与阶变型变化。从震时应力调整状态来看,中国大陆受此次地震影响较为明显的区域主要是南北地震带,特别是甘青交界、云南地区及川渝黔交界等应力增强明显。从震例分析来看,在尼泊尔M_W8.1地震发生后的2a内,中国大陆有4次地震发生在甘青交界与云南地区,这表明水位同震效应阶变反演的震时应力增强区域,可能对未来地震危险区具有一定的指示意义。
The variation characteristics of coseismic response of well water level in Chinese mainland caused by M_W 8.1 earthquake in Nepal were analyzed and the coseismic water level variation was used to retrieve the stress adjustment status of the Chinese mainland. The results show that the coseismic responses of the well water level in the Chinese mainland caused by the M_W8.1 earthquake in Nepal are mainly characterized by oscillations and deformations. From the state of stress adjustment at the time of earthquake, most of the areas affected by this earthquake in mainland China are mainly the North-South seismic belt, especially the junction of the Gansu and Qinghai provinces, and the boundary between Yunnan, Sichuan, Chongqing and Guizhou. From the earthquakes analysis, within 2 years after M_8.1 earthquake in Nepal, there were 4 earthquakes occurred in the Chinese mainland at the junction of Gansu and Yunnan provinces, indicating that the earthquake-induced stress-enhanced region , May have some indication to the future earthquake danger zone.