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http://dx.doi.org/10.5000/EESK.2010.14.2.049

Application of the JMA instrumental intensity in Korea  

Kim, Hye-Lim (광주지방기상청)
Kim, Sung-Kyun (전남대학교 지구환경과학부)
Choi, Kang-Ryong (한국원자력안전기술원)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.14, no.2, 2010 , pp. 49-56 More about this Journal
Abstract
In general, the seismic intensity deduced from instrumental data has been evaluated from the empirical relation between the intensity and the PGA. From the point of view that the degree of earthquake damage is more closely associated with the seismic intensity than with the observed PGA, JMA developed the instrumental seismic intensity (JMA instrumental intensity) meter that estimate the real-time seismic intensity from the observed strong motion data to obtain a more correct estimate of earthquake damage. The purpose of the present study is to propose a practical application of the JMA instrumental intensity in Korea. Since the occurrence of strong earthquakes is scarce in the Korean Peninsula, there is an insufficiency of strong motion data. As a result, strong motion data were synthesized by a stochastic procedure to satisfy the characteristics of a seismic source and crustal attenuation of the Peninsula. Six engineering ground motion parameters, including the JMA instrumental intensity, were determined from the synthesized strong motion data. The empirical relations between the ground motion parameters were then analyzed. Cluster analysis to classify the parameters into groups was also performed. The result showed that the JMA acceleration ($a_0$) could be classified into similar group with the spectrum intensity and the relatively distant group with the CAV (Cumulative Absolute Velocity). It is thought that the $a_0$ or JMA intensity can be used as an alternative criterion in the evaluation of seismic damage. On the other hand, attenuation relation equations for PGA and $a_0$ to be used in the prediction of seismic hazard were derived as functions of the moment magnitude and hypocentral distance.
Keywords
JMA instrumental intensity; CAV; Cluster analysis; Attenuation equation;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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