Figure 5. Two measures of the strength of shaking in the mainshock are peak ground acceleration (left) and peak ground velocity (right). The upper panels are from the Central Weather Administration (CWA) of Taiwan, and the lower panels are from the USGS (downloaded on April 3, 2024) using seismic recordings provided by CWA. One recording, at about 12 kilometers from the rupture periphery, shows an astonishingly high (150%g) peak ground acceleration. But the other recordings are consistent with the USGS and other models of shaking for an earthquake of this size.