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Variations of soil radon and thoron concentrations in a fault zone and prospective earthquakes in SW Taiwan |
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| Authors: | T.F. Yang V. Walia L.L. Chyi C.C. Fu C.-H. Chen T.K. Liu S.R. Song C.Y. Lee M. Lee |
| Affiliation: | aDepartment of Geosciences, National Taiwan University, P.O. Box 13-318, Taipei 10699, Taiwan bNational Center for Research on Earthquake Engineering, Taipei 106, Taiwan cDepartment of Geology, The University of Akron, OH 44325-4101, USA dCentral Geological Survey, MOEA, Taipei 235, Taiwan |
| Abstract: | An automatic station for soil gas monitoring was set up on an active fault zone of SW Taiwan. After more than one year of continuous measurements, some spike-like anomalous high radon and thoron concentrations could be observed. A similar soil radon spectrum was also obtained from an independent monitoring station, which was only 100 m away. These anomalous peaks usually occurred a few days or weeks before the earthquakes (ML4.5). This indicates that variations of both soil radon and thoron can serve as useful tools for earthquake surveillance, esp. at fault zones. |
| Keywords: | Radon Thoron Earthquake monitoring Soil gas 3He/4He ratio Taiwan |
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