Aquifer hydraulic parameter can change during earthquakes. Continuous monitoring of the response of water level to seismic waves or solid Earth tides provides an opportunity to document how earthquakes influence hydrological properties. Here, we use data of two groundwater wells, Dian-22 (D22) and Lijiang (LJ) well, in southeast Tibet Plateau in response to the 2015 Mw 7.8 Gorkha earthquake to illustrate hydrological implications. The coherences of water level and seismic wave before and after the far-field earthquake show systematic variations, which may confirm the coseismic dynamic shaking influence at high frequencies (f > 8 cpd). The tidal response of water levels in these wells shows abrupt coseismic changes of both phase shift and amplitude ratio after the earthquake, which may be interpreted as an occurrence in the vertical permeability of a switched semiconfined aquifer in the D22 well, or an enhancement unconfined aquifer in the LJ well. Using the continuous short-term transmissivity monitoring, we show that the possible coseismic response for about 10 days and instant healing after 10 days to the causal earthquake impact. Thus, the dynamic shaking during the Gorkha earthquake may have caused the short-term aquifer responses by reopening of preexisting vertical fractures and later healing at epicentral distances about 1500 km.

含水层水力参数会在地震期间发生变化。连续监测水位对地震波或固体地球潮汐的响应为记录地震如何影响水文特性提供了机会。在这里，我们使用青藏高原东南部两口地下水井 Dian-22 (D22) 和丽江 (LJ) 井的数据来说明 2015 年 Mw 7.8 廓尔喀地震的水文影响。远场地震前后水位和地震波的相干性表现出系统性变化，这可能证实了高频（f > 8 cpd）。这些井水位的潮汐响应在震后出现了相移和振幅比的突然同震变化，这可以解释为发生在D22井中转换半承压含水层的垂直渗透率，或增强的无承压含水层。在LJ井。使用连续的短期透射率监测，我们表明可能的同震反应大约 10 天，并在 10 天后对因果地震影响立即愈合。因此，廓尔喀地震期间的动态震动可能通过重新打开预先存在的垂直裂缝和随后在震中距离约 1500 公里处愈合而引起短期含水层响应。