Application of the region–time–length algorithm to study of earthquake precursors in the Thailand–Laos–Myanmar borders

Journal of earth system science

P Puangjaktha^1¹ 

[1] Morphology of Earth Surface and Advanced Geohazards in Southeast Asia Research Unit (MESA RU), Department of Geology, Chulalongkorn University, Bangkok 10330, Thailand.^1

关键词: Earthquake catalogue;    RTL algorithm;    seismic quiescence;    earthquake precursor;    Thailand– Laos–Myanmar borders;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

In order to examine the precursory seismic quiescence of upcoming hazardous earthquakes, the seismicity data available in the vicinity of the Thailand–Laos–Myanmar borders was analyzed using the Region–Time–Length (RTL) algorithm based statistical technique. The utilized earthquake data were obtainedfrom the International Seismological Centre. Thereafter, the homogeneity and completeness of the catalogue were improved. After performing iterative tests with different values of the r₀ and t₀ parameters, those of r₀ = 120 km and t₀ = 2 yr yielded reasonable estimates of the anomalous RTL scores, in both temporal variation and spatial distribution, of a few years prior to five out of eight strong-to-major recognized earthquakes. Statistical evaluation of both the correlation coefficient and stochastic process for the RTL were checked and revealed that the RTL score obtained here excluded artificial or randomphenomena. Therefore, the prospective earthquake sources mentioned here should be recognized and effective mitigation plans should be provided.

【 授权许可】

CC BY