日本9.0级地震甘肃地下流体资料同震响应特征分析
Characteristics of the Co-seismic Response of Fluid Data in the Gansu Area Prior to the 2011 Tohoku M9.0 Earthquake,Japan

2011年3月11日日本东北部宫城县以东太平洋海域发生9.0级地震时，我国有不少地下流体台站记录到了丰富的同震响应现象，甘肃地区数字化地下流体观测资料也出现不同程度的同震响应。分析了该地震时甘肃地区数字化水位、水温同震变化特征和响应能力，发现井水位的同震响应有振荡和突变两种形态，多数在震后较快恢复原来状态。水温记录同震响应能力明显低于水位，仅有1个测项记录到同震响应，为短时间波动，且很快恢复。
During the Tohoku M9.0 great earthquake of March 11th, 2011, the digital observation data on underground fluids in the Gansu area showed different degrees of co-seismic response. In this study, we analyzed the co-seismic change characteristics and response ability of the digital water levels and water temperature in the Gansu area during the earthquake. It was found that the co-seismic response of the water level had two main patterns:oscillation and mutation. The water level of most wells returned to the initial state a short time after the earthquake. The recorded water temperature data showed a lower response capacity than the water level data. Only one of the measurement instruments recorded the co-seismic response of the water temperature, but this was just a short-term fluctuation and it easily recovered.