2004 Volume 6 Pages 181-190
A realtime evaluation system of population exposure to seismic intensity (PEX) has been proposed. On the basis of the JMA intensities reported via prefectural seismic intensity information network, the proposed system processes site corrections and spatial interpolations to estimate intensity distribution on uniform grid cells with spacing of 500m. The derived intensity distribution is immediately overlaid with the population distribution of the concerned area to aggregate population exposed to a certain level of seismic intensity. Thus the PEX information is issued for emergency response personnel to intuitively understand the social impact in a real time manner. Numerical examples have been shown for realtime PEX evaluation in Gifu prefecture using past and hypothetical earthquake events.
