Monitoring Groundwater Radon for Earthquake Precursors near Shitou, Taiwan

• Main Authors: Yu-ChenCheng, 鄭羽辰
• Other Authors: Ming-Ching Kuo
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/97561550354736108824

碩士 === 國立成功大學 === 資源工程學系碩博士班 === 101 === Radon anomalous declines prior to the 2012 ML 5.3 Alisan, 2013 ML 6.2 Nantou, and 2013 ML 6.5 Nantou earthquakes were recorded at the Shitou spring. Specifically, radon decreased from background levels of 360 ± 9, 364 ± 24, and 322 ± 29 pCi/L to minima of 251 ± 25, 238 ± 8, and 168 ± 10 pCi/L prior to the 2012 ML 5.3 Alisan, 2013 ML 6.2 Nantou, and 2013 ML 6.5 Nantou earthquakes, respectively. The study at the Shitou spring in southern Taiwan confirms that groundwater radon can be a consistent precursor for strain changes in the crust preceding an earthquake when observed in a low-porosity fractured aquifer.