Fig. 4
From: Strong localized asperity of the 2011 Tohoku-Oki earthquake, Japan
(a) Original and (b) band-passed (0.006–0.02 Hz) vertical ground velocity seismograms at GJM. (c, d) Particle motions of band-passed (0.006–0.02 Hz) displacement seismograms at GJM in the radial-transverse and vertical-radial planes, respectively. Arrows in Figs. 4(c) and 4(d) indicate the direction to the earthquake source. (e) Amplitude spectrum of the vertical displacement seismogram corrected for medium attenuation (thin solid line) and the best fit of the omega-square model to the spectrum (thick solid line) at GJM.