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SEISMICITY RATE CHANGE AND REGION-TIME-LENGTH ALGORITHM INVESTIGATIONS ALONG THAILAND-LAOS-MYANMAR BORDERS |
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| รหัสดีโอไอ | |
| Title | SEISMICITY RATE CHANGE AND REGION-TIME-LENGTH ALGORITHM INVESTIGATIONS ALONG THAILAND-LAOS-MYANMAR BORDERS |
| Creator | Prayot Puangjaktha |
| Contributor | Santi Pailoplee |
| Publisher | Chulalongkorn University |
| Publication Year | 2557 |
| Keyword | Faults (Geology) -- Thailand, Faults (Geology) -- Laos, Faults (Geology) -- Burma, Earthquake hazard analysis, Algorithms, Earth movements, Seismology, รอยเลื่อน (ธรณีวิทยา) -- ไทย, รอยเลื่อน (ธรณีวิทยา) -- ลาว, รอยเลื่อน (ธรณีวิทยา) -- พม่า, การประเมินอันตรายจากแผ่นดินไหว, อัลกอริทึม, การเคลื่อนไหวของโลก, วิทยาแผ่นดินไหว |
| Abstract | In order to investigate the prospective areas of the upcoming strong earthquakes, i.e., Mw ≥ 6, the seismicity data have been posed in the vicinity of Thailand-Laos-Myanmar borders were investigated statistically. Based on the successful investigation of previous work, two statistic techniques were applied in this study, i.e., seismicity rate change (Z value) and Region-Time-Length (RTL) algorithm. According to the completeness of the earthquake data, the available 8 case studies of strong earthquakes were investigated retrospectively. Regarding to the Z value, the condition of time window = 1.2 years, the number of earthquakes = 50 events, and fixed node radius = 250 km showed the locations of Z anomalies conformed to 5 of 8 earthquakes. Meanwhile, using characteristic parameters r0 = 120 km, t0 = 2 years, the RTL anomalies quite related to 5 of 8 earthquakes. Therefore, it is concluded that both Z and RTL methods applied in this study are fairly effective to evaluate the earthquake precursor. In order to evaluate the prospective area for the upcoming earthquake, both Z and RTL were analyzed with the complement by the suitable characteristic parameters mentioned above and the most up-to-date completeness seismicity data. The results reveal that the small area in the vicinity of Thailand-Myanmar border are quiescence seismically conforming to that proposed by the previous investigation of b value of the frequency-magnitude distribution. Therefore, it is concluded that according to both Z, RTL, and b value methods that the prospective areas proposed in this study might be posed by the upcoming earthquake. |
| URL Website | cuir.car.chula.ac.th |
