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首页> 外文期刊>Earth, planets and space: EPS >Groundwater changes associated with the 2004 Niigata-Chuetsu and 2007 Chuetsu-oki earthquakes
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Groundwater changes associated with the 2004 Niigata-Chuetsu and 2007 Chuetsu-oki earthquakes

机译：朗多纳特（Rondoat）的变更与阿苏（Ashishi）的三通（2004新泻）Chu Etsu和2007 Chu Etsu Oki Ea Rth Kuake的

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The Geological Survey of Japan, AIST, has been monitoring groundwater in and around the Kinki and Tokai districts for earthquake prediction research. The Niigata Prefectural Office has also been observing groundwater for monitoring land subsidence in Niigata Prefecture. The 2004 Niigata-Chuetsu (M-JMA 6.8) and 2007 Chuetsuoki (M-JMA 6.8) earthquakes occurred in Niigata Prefecture, Japan, on October 23, 2004 and July 16, 2007, respectively. The two earthquakes have a similar magnitude, epicenter, and mechanism. At many of the observation wells, we detected changes in groundwater level or pressure related to the two earthquakes, but no clear precursory changes. At all of our observation wells in Niigata Prefecture, trend changes were observed after coseismic step-like changes for both of the earthquakes. At some of the Stations in and around the Kinki and Tokai districts, coseismic trend changes and/or step-like changes were observed. The pattern of the changes were almost similar for the two earthquakes. Those changes were considered to be caused not by the static crustal deformation but by the ground shaking.
机译：日本地质调查局（AIST）一直在对近畿和东海地区及其周围地区的地下水进行监测，以进行地震预测研究。新泻县役所也一直在观察地下水，以监测新泻县的土地沉降。 2004年10月23日和2007年7月16日在日本新泻县发生了2004年新泻县中地震（M-JMA 6.8）和2007年Chuetsuoki（M-JMA 6.8）地震。两次地震具有相似的震级，震中和机制。在许多观测井中，我们检测到与两次地震有关的地下水位或压力变化，但没有明显的前兆变化。在我们新泻县的所有观测井中，两次地震的同震阶梯状变化都观察到了趋势变化。在近畿和东海地区及其周边地区的一些站点，观测到同震趋势变化和/或阶梯状变化。两次地震的变化模式几乎相似。这些变化被认为不是由静态地壳变形引起的，而是由地面震动引起的。

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