A Stress Condition in Aquifer Rock for Detecting Anomalous Radon Decline Precursory to an Earthquake

A Stress Condition in Aquifer Rock for Detecting Anomalous Radon Decline Precursory to an Earthquake

Recurrent groundwater radon anomalous declines were observed from well measurements in the Antung hot spring area (eastern Taiwan) prior to five of six earthquakes that occurred between 2003 and 2011 ( M w range 5.0–6.8). The relationship between the detectability of radon anomalies and the first mo...

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Veröffentlicht in:Pure and applied geophysics 2017-03, Vol.174 (3), p.1291-1301
Hauptverfasser: Kuo, T., Kuochen, H., Ho, C., Chen, W.
Format: Artikel
Sprache:eng
Schlagworte:
Aquifers
Compressing
Earth and Environmental Science
Earth Sciences
Earthquakes
Geophysics
Geophysics/Geodesy
Groundwater
Hot springs
Precursors
Radon
Rock
Rocks
Seismic activity
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Zusammenfassung:Recurrent groundwater radon anomalous declines were observed from well measurements in the Antung hot spring area (eastern Taiwan) prior to five of six earthquakes that occurred between 2003 and 2011 ( M w range 5.0–6.8). The relationship between the detectability of radon anomalies and the first motions of P-waves was investigated. Based on the first motions of P-waves recorded near the investigated well, a precursory decrease in groundwater radon can be detected only when the first motion is compression. No precursory change in groundwater radon concentration was observed for the downward first motion of P-waves.
ISSN:0033-4553
1420-9136
DOI:10.1007/s00024-016-1461-2