T. KuoK. FanY. HanH. ChuY. LeeHAO KUO-CHEN2022-06-302022-06-3020060265931Xhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-33645326507&doi=10.1016%2fj.jenvrad.2006.01.005&partnerID=40&md5=1a0ac2617ff6ae7041b8c449dc0aa04ahttps://scholars.lib.ntu.edu.tw/handle/123456789/614603On December 10, 2003, an earthquake of magnitude (M) 6.8, the strongest since 1951, occurred near the Chengkung area in eastern Taiwan. Approximately 65 d prior to the 2003 Chengkung earthquake, precursory changes in the groundwater radon concentration were observed at the Antung radon-monitoring station located 20 km from the epicenter. The radon anomaly was a decrease from a background level of 28.9 Bq L-1 to a minimum of 12.2 Bq L -1. Observations at the Antung hot spring suggest that the groundwater radon, when observed under suitable geological conditions, can be a sensitive tracer for strain changes in the crust preceding an earthquake. © 2006 Elsevier Ltd. All rights reserved.Earthquake effects; Environmental engineering; Geology; Earthquake; Fault; Radon-222; Groundwater; ground water; radon 222; earthquake precursor; groundwater; radon; article; concentration (parameters); earthquake; medical research; thermal spring; water contamination; Environmental Monitoring; Geography; Natural Disasters; Radon; Taiwan; Water; Water Pollutants, Radioactive; Asia; Eurasia; Far East; Taiwanjournal article10.1016/j.jenvrad.2006.01.005165335452-s2.0-33645326507