Fig. 4

Acceleration waveforms at FUK at the time of the 2011 Tohoku-oki event following Proc. V for the cases where a the output of the seismometer was truncated at the P-wave arrival time \(t_{\text{P}}\) prior to the deconvolution, b the output was truncated at \(t_{\text{P}} + 50\) s, and c the output was truncated at \(t_{\text{P}} + 250\) s. d, e, and f are the enlarged views between \(t_{\text{eq}} - 400\) s (here \(t_{\text{eq}}\) denotes the event origin time) and \(t_{\text{P}}\) of a, b, and c, respectively. The vertical lines indicate \(t_{\text{eq}}\). The output of the seismometer was not clipped before \(t_{\text{P}} + 250\) s