Journal: |
Earthquake Science 2012 No.3
clicks:686 |
Title:
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Author:
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Jiangrong Zheng, Haolin Jiang and Zhengran He2 |
Adress: |
Earthquake Administration of Jiangsu Province, Nanjing 210014, China |
Abstract:
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This thesis discusses the earthquake
reflecting ability of the observation well pattern system of Jiangsu Province,
China, which has been digitally renovated, and probes into the cause of the
major differences in the earthquake reflecting abilities of well holes at
different measurement points. This is achieved through the analysis of the
co-seismic responses to the Wenchuan (2008; Ms8.0, China) and Tohoku (2011;
Ms9.0, Japan) earthquakes. We found that the co-seismic response of water level
from regional well holes in Jiangsu Province was stronger than that of water
temperature. The water-level co-seismic response follows a consistent law and is
closely related to the earthquake magnitude. The co-seismic response of water
temperature strongly varied among well points, and was more often manifested as
a slow restorative change. The co-seismic responses also varied based on
tectonic elements. The response in central and northern Jiangsu was weaker than
that of southern Jiangsu, possibly due to the thicker loess cover layer in
central Jiangsu which makes it less effective at capturing the micro-changes of
stress-strain states relative to the hilly land in the south. The more
complicated geological structure in southern Jiangsu makes it contribute to
greater changes in the state of underground water after a minor disturbance |
Comment: |
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