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首页> 外文期刊>Earth, planets and space: EPS >Groundwater level changes related to the ground shaking of the Noto Hanto Earthquake in 2007
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Groundwater level changes related to the ground shaking of the Noto Hanto Earthquake in 2007

机译：2007年能登汉托地震与地面震动相关的地下水位变化

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摘要

The Geological Survey of Japan, AIST has been monitoring groundwater using the observation network of about 40 stations in and around the Kinki and Tokai districts for earthquake prediction research. The Noto Hanto Earthquake in 2007 (M-JMA 6.9) occurred in the northwestern part of the Noto Hanto Peninsula, Japan on March 25, 2007. The epicentral distance to the nearest and furthest observation well is about 100 km and 400 km, respectively. Changes in groundwater level related to the Noto Hanto Earthquake were detected at many stations. Most of these were changes in the long-term trend and/or short-term oscillation; there were a few step-like changes. The coseismic static volumetric strain changes calculated froth the fault model ranged between 10(-9) and 10(-10) at most of the observation stations. These changes were therefore considered to be groundwater changes caused by the ground shaking because groundwater level sensitivity to crustal volumetric strain is a few centimeters to 10(-8) strain at the most. We compared the coseismic groundwater level changes for the Noto Hanto Earthquake with those for live recent large earthquakes and obtained rough characteristics of the effect of the ground shaking on the groundwater level at each of the observation stations.
机译：日本地质调查局（AIST）一直使用近畿和东海地区及周边地区约40个站的观测网络监测地下水，以进行地震预测研究。 2007年的Noto Hanto地震（M-JMA 6.9）于2007年3月25日发生在日本Noto Hanto半岛的西北部。距最近和最远的观测井的震中距离分别约为100 km和400 km。在许多台站都发现了与诺托汉托地震有关的地下水位变化。其中大多数是长期趋势和/或短期振荡的变化;有一些类似步骤的变化。在大多数观测站，通过断层模型计算出的同震静态体积应变变化范围在10（-9）和10（-10）之间。因此，这些变化被认为是由地面震动引起的地下水变化，因为地下水位对地壳体积应变的敏感性最大为几厘米至10（-8）应变。我们将Noto Hanto地震与最近发生的大地震的同震地下水位变化进行了比较，并获得了每个观测站地面震动对地下水位的影响的大致特征。

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