TITLE:
Relationship between Modified Mercalli Intensity and peak ground acceleration in Myanmar
AUTHORS:
Santi Pailoplee
KEYWORDS:
Isoseismal Map; Modified Mercalli Intensity; Peak Ground Acceleration; Myanmar
JOURNAL NAME:
Natural Science,
Vol.4 No.8A,
August
14,
2012
ABSTRACT: In this study, the previously reported isoseismal maps are compiled and used to carefully investigate the macroseismic intensity in terms of the Modified Mercalli Intensity (MMI) scale, based on the engineering ground-motion parameter, as the peak ground acceleration (PGA), inferred from the ground-motion attenuation characteristic of Myanmar. The preliminary relationship between the MMI and PGA is reported to be a function of log10(PGA) = 0.2526MMI – 3.1006. The strongly correlated MMI-PGA relationship obtained in this study, if confirmed, will be particularly useful in real-time applications for damage prediction or engineering parameter determination when an earthquake occurs in or nearby to Myanmar. Compared with the previously proposed MMI-PGA relationships for other regions, the standard of building construction in Myanmar is not high enough to withstand the hazards from earthquakes, particularly at higher levels of ground motion. Therefore, the standard building code for Myanmar should be modified in order to reduce future hazards arising from earthquakes.