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Earth, Planets and Space
Fig. 1. | Earth, Planets and Space

Fig. 1.

From: Precise aftershock distribution of the 2011 off the Pacific coast of Tohoku Earthquake revealed by an ocean-bottom seismometer network

Fig. 1.

Location map of ocean bottom seismometers with bathymetric features. Triangle and hexagons indicate the positions of pop-up-type OBSs which were deployed before the mainshock. Circles and squares denote the positions of OBSs which were deployed for an urgent observation after the mainshock. Various type of OBSs were used for aftershock observations. See inset legend. Yellow hexagons indicate the position of the OBSs which were recovered on March 30th. Large and small stars indicate the epicenters of the mainshock and the largest aftershock, respectively. (a) For the first-period observation from March 14 to the end of April, 2011. (b) For the second-period observation from the end of April to the middle of June.

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