AN ANOMALOUS RADON DECREASE IN GROUNDWATER PRIOR TO AN M6.0 EARTHQUAKE - A POSSIBLE PRECURSOR

被引：38

作者：

WAKITA, H

IGARASHI, G

NOTSU, K

机构：

[1] Laboratory for Earthquake Chemistry, Faculty of Science, University of Tokyo

来源：

GEOPHYSICAL RESEARCH LETTERS | 1991年 / 18卷 / 04期

关键词：

D O I：

10.1029/91GL00824

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

A significant decrease in the radon concentration of artesian groundwater was observed at a well-established observation site in Northeast Japan about two days before an M 6.0 earthquake occurred about 200 km from the site. On the basis of a concurrent in situ (-126 m) temperature drop of the groundwater, we infer that precursory changes in regional stress were locally amplified near this site and resulted in the temporary mixing of cooler, radon-poor groundwater into the normal artesian flow.

引用

页码：629 / 632

页数：4

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