In this paper,the long time series data of the well water-level data of 12 wells in the Sichuan and Yunnan area is analyzed by the Baytap-G tidal analysis software,and well water level tidal response characteristic pa...In this paper,the long time series data of the well water-level data of 12 wells in the Sichuan and Yunnan area is analyzed by the Baytap-G tidal analysis software,and well water level tidal response characteristic parameters( amplitude ratio and phase change)are extracted. We analyzed the features of the shape and stage change,and characteristic parameters of the tidal response of well water level before and after the earthquakes,which can provide a new method and approach to analyzing the response relationships between well water level and earth tide and barometric pressure. The results show that Luguhu Well and 9 other wells are affected by earth tides,and their well water level amplitude ratios and phases are relatively stable; the Nanxi Well and Dayao Well water level changes are affected by the barometric pressure combined with tide force,and their well water level amplitude ratios and phases are more discrete. The water level amplitude ratios and phases of Jiangyou Well,Luguhu Well and Dongchuan Well are significant to large earthquakes,and the relationship between seismic energy density and water level amplitude ratios and phases of M_2 wave of the three wells are presented.展开更多
In this study, we analyze the co-seismic response of water levels in the Jiaji well to strong earthquakes （Ms ≥7. 8） from 2001 to 2010 at an epicentrai distance less than 8000km. We investigated the co-seismic vari...In this study, we analyze the co-seismic response of water levels in the Jiaji well to strong earthquakes （Ms ≥7. 8） from 2001 to 2010 at an epicentrai distance less than 8000km. We investigated the co-seismic variation form of water levels, and analyzed the relationship between the amplitude of water level variation and the magnitude and the epicentral distance. We then checked the seismic wave phases when the changes of water level occurred. It was shown that： （1） the water level＇s co-seismic response is mainly characterized by escalation with no oscillation; （2） the amplitude of water level change has a certain connection with epicentral distance and magnitude; （3） co-seismic response of water levels in the Jiaji well shows a certain directivity; （4） most of the co-seismic responses were caused by surface waves, and some by long-period S waves.展开更多
基金sponsored by the Spark Program of Earthquake Technology of CEA in 2017(XH17026)Combination Project with Monitoring,Prediction and Scientific Research of Earthquake Technology,CEA(162205)
文摘In this paper,the long time series data of the well water-level data of 12 wells in the Sichuan and Yunnan area is analyzed by the Baytap-G tidal analysis software,and well water level tidal response characteristic parameters( amplitude ratio and phase change)are extracted. We analyzed the features of the shape and stage change,and characteristic parameters of the tidal response of well water level before and after the earthquakes,which can provide a new method and approach to analyzing the response relationships between well water level and earth tide and barometric pressure. The results show that Luguhu Well and 9 other wells are affected by earth tides,and their well water level amplitude ratios and phases are relatively stable; the Nanxi Well and Dayao Well water level changes are affected by the barometric pressure combined with tide force,and their well water level amplitude ratios and phases are more discrete. The water level amplitude ratios and phases of Jiangyou Well,Luguhu Well and Dongchuan Well are significant to large earthquakes,and the relationship between seismic energy density and water level amplitude ratios and phases of M_2 wave of the three wells are presented.
基金supported by the 2011 "China Spark Program"of China Earthquake Administration(XH1020)
文摘In this study, we analyze the co-seismic response of water levels in the Jiaji well to strong earthquakes （Ms ≥7. 8） from 2001 to 2010 at an epicentrai distance less than 8000km. We investigated the co-seismic variation form of water levels, and analyzed the relationship between the amplitude of water level variation and the magnitude and the epicentral distance. We then checked the seismic wave phases when the changes of water level occurred. It was shown that： （1） the water level＇s co-seismic response is mainly characterized by escalation with no oscillation; （2） the amplitude of water level change has a certain connection with epicentral distance and magnitude; （3） co-seismic response of water levels in the Jiaji well shows a certain directivity; （4） most of the co-seismic responses were caused by surface waves, and some by long-period S waves.
