2011 Volume 52 Issue 4 Pages 206-209
The earthquake early warning system was put into operation in Japan in order to stop Shinkansen trains as rapidly as possible before the strike of large tremors, in the case of an earthquake. The present paper overviews current earthquake early warning system configuration and functions and evaluates the accuracy of epicenter estimation by that same system by using the latest datasets. The estimation error (rms) of epicentral distance in the present system is 0.324 on a logarithmic scale. By re-determination of the coefficients of correlation equation for estimation, it was confirmed that the estimation error was reduced by 13%.
