Abstract
This study was carried out to investigate the role of rainfall in triggering ordinary earthquakes that occurred before and after the major Chi-Chi earthquake (7.2 ML) in central Taiwan on 21 September 1999. To test a possible mechanism, earthquake activities from January 1995 to July 2012 were examined. The Chi-square (χ2) test revealed a significant difference between the correlations of monthly accumulated rainfall values and earthquake activities before and after the Chi-Chi earthquake. This result is discussed in terms of changes in crustal conditions after the Chi-Chi earthquake. Two ordinary earthquakes that may have been associated with heavy rainfall after the Chi-Chi earthquake are identified.Editor D. Koutsoyiannis; Associate editor A. PorporatoCitation Lin, J.-W., 2014. Rainfall-triggered ordinary earthquakes in Taiwan: a statistical analysis. Hydrological Sciences Journal, 59 (5), 1074–1080.
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