Radon anomalies precursory to the 2003 Mw = 6.8 Chengkung and 2006 Mw = 6.1 Taitung earthquakes in Taiwan
Journal
Radiation Measurements
Journal Volume
44
Journal Issue
3
Pages
295-299
Date Issued
2009
Author(s)
Abstract
Contrary to the normally observed increase in groundwater radon that occurs prior to earthquakes, we have measured anomalous decreases in radon concentration prior to the 2003 MW = 6.8 Chengkung and 2006 MW = 6.1 Taitung earthquakes that occurred within a 55 km radius from the Antung D1 monitoring well in eastern Taiwan. The v-shaped pattern of radon anomalies recognized at Antung is valuable for detecting the aseismic strain precursory to potentially disastrous earthquakes in a fractured aquifer surrounded by ductile aquitard in seismotectonic environments in this area. © 2009 Elsevier Ltd. All rights reserved.
Type
journal article