การทำนายการเกิดแผ่นดินไหวบริเวณรอยเลื่อนระนอง จังหวัดระนอง โดยวิเคราะห์ปริมาณก๊าซเรดอนที่เปลี่ยนแปลง

Abstract

An earthquake is a natural phenomenon that indicates the Earth isn’t equilibrium. Due to the enormous pressure that has accumulated under the tectonic plates causing the release of energy in the form of seismic waves. As a result, various building structures are damaged or collapsed. including people's lives. Most of them occur in areas of active fault pass through in the area. In this area, radon is formed due to the movement of tectonic plates. The sudden increase or decrease in radon is usually a phenomenon that occurs before an earthquake.The purpose of this research was to analyze radon changes at 10 locations and 2 reference locations on Ranong fault, Ranong province (the length of this fault is 20.65 km). Due to this fault passes through in the community area, it’s interesting to do research in this area. The radon concentration was measured using the Solid State Nuclear Track Detectors (SSNTD, CR39). To analyze radon gas changes and seismic data at the Ranong Fault, Ranong province and nearby areas during the past 5 years from the earthquake data of the Thai Meteorological Department database. and continuing in the future for at least 1 year. The results showed that radon gas concentrations were measured in the area, or near the fault line more than other stations. There were 3 earthquakes in the Ranong fault group on January 26, 2020 in the area of Takua Pa, Phang Nga, 2 times with magnitude 2.1 and 2.2 respectively and on February 6, 2020 and in the area of Bang Saphan, Prachuap Khiri Khan, 1 time, magnitude 2.8 by the concentration of radon gas measured at every station in the 1st time. It was found that the radon gas concentration at all stations is high and will decrease during the next measurement. In summary, the changed in radon gas concentration is related to the measured earthquakes. It can also be identified that RNF2 and RNF8 stations have the potential to be used to warn of future earthquakes caused by the Ranong Fault because these two stations measure the concentration of radon gas higher than other stations. and Background stations 2 to 5 times and are located near the Ranong fault line.