Source Uncertainty Estimation in Seismic Intensity Determination of the Taiwan Region

In this work, we quantify the effect of source uncertainties, other than earthquake magnitude and location, in rapid seismic intensity determinations in Taiwan using the strong‐motion accelerograms recorded by stations of the Taiwan Strong‐Motion Instrumentation Program (TSMIP) between 1991 and 2010. We find that rapid earthquake reporting assumes that a point source has an uncertainty of 0.5° in intensity and 7.2  cm/s2 in peak ground acceleration (PGA). Therefore, these values can be regarded as the upper bound for precision in the Taiwan rapid reporting system (RRS).