Application of the regiona??timea??length algorithm to study of earthquake precursors in the Thailanda??Laosa??Myanmar borders

摘要

In order to examine the precursory seismic quiescence of upcoming hazardous earthquakes, the seismicity data available in the vicinity of the Thailanda??Laosa??Myanmar borders was analyzed using the Regiona??Timea??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 ra?? and ta?? parameters, those of ra?? = 120 km and ta?? = 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.