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Estimation of aseismic crustal-strain using radon precursors of the 2003 M 6.8, 2006 M 6.1, and 2008 M 5.0 earthquakes in eastern Taiwan

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  • T. Kuo
  • C. Lin
  • G. Chang
  • K. Fan
  • W. Cheng
  • C. Lewis

Abstract

Aseismic crustal-strain signals prior to the 2003 Mw 6.8 Chengkung, 2006 Mw 6.1 Taitung, and 2008 Mw 5.0 Antung earthquakes with epicenters located 20, 55 and 11 km, respectively, from the Antung radon-monitoring station have been calculated using the radon anomalies recorded. Specifically, radon decreased from background levels of 791 ± 46, 762 ± 57, and 735 ± 48 pCi/L to minima of 326 ± 9, 371 ± 9, and 480 ± 43 pCi/L prior to the 2003, 2006, and 2008 earthquakes, respectively. The estimated aseismic crustal-strain maxima at the Antung hot spring during the rock dilation stage were 3.6, 2.7, and 1.3 ppm, respectively. The v-shaped radon pattern recognized in all three anomalies is valuable for detecting the aseismic strain precursory to disastrous earthquakes in the Antung hot spring which is situated in a brittle fractured aquifer of limited recharge surrounded by ductile mudstone. Copyright Springer Science+Business Media B.V. 2010

Suggested Citation

  • T. Kuo & C. Lin & G. Chang & K. Fan & W. Cheng & C. Lewis, 2010. "Estimation of aseismic crustal-strain using radon precursors of the 2003 M 6.8, 2006 M 6.1, and 2008 M 5.0 earthquakes in eastern Taiwan," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 53(2), pages 219-228, May.
    • Handle: RePEc:spr:nathaz:v:53:y:2010:i:2:p:219-228
    DOI: 10.1007/s11069-009-9423-y
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    References listed on IDEAS

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    1. Evelyn Roeloffs, 1999. "Radon and rock deformation," Nature, Nature, vol. 399(6732), pages 104-105, May.
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