Fig. 7
From: Reconstruction of a 2D seismic wavefield by seismic gradiometry
a Vertical-component displacement traces at all Hi-net stations used in the analysis for the 2005 Off-Tohoku outer-rise earthquake at the 25–50 s period band. Amplitudes are normalized by the maximum value along each trace. b Station map with the earthquake mechanism from the Global CMT catalog. Light gray contours show bathymetry (contour interval, 500 m). The gray dash-dot arcs indicate iso-distances at 200 km intervals from the epicenter