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Fig. 2. | Earth, Planets and Space

Fig. 2.

From: Aftershock observation of the 2011 off the Pacific coast of Tohoku Earthquake by using ocean bottom seismometer network

Fig. 2.

Example of seismograms of an aftershock for three OBSs and one land station. See Fig. 1 for positions of the OBSs and the land station. Three components are shown and no filter is applied. The origin time of the event is 01:30:15.9 JST on March 15th 2011 and the estimated coordinate of the hypocenter is 36°05.1′N, 141°47.7′E. The depth and magnitude of the event are 21.3 km and 2.5, respectively. Each trace is normalized by its maximum amplitude. The OBS number is labeled above each trace. V and H denote vertical component and horizontal components of the seismogram, respectively. Solid and open inverted triangles indicate P- and S-wave arrivals, respectively.

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