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Earth, Planets and Space
Fig. 3. | Earth, Planets and Space

Fig. 3.

From: The 2011 off the Pacific coast of Tohoku Earthquake related to a strong velocity gradient with the Pacific plate

Fig. 3.

Map view of P-wave velocity perturbation within the Pacific plate 10 km beneath the upper boundary of the Pacific plate. Red star on B−B′=H−H′ shows the location of the hypocenter of the 2011 Tohoku Earthquake. Small red star on G−G′ denotes the hypocenter of the aftershock off Ibaraki. Large and small ellipses show the location of landward and trenchward low-V zones, respectively. Blue arrows between the ellipses denote the central high-V zone. Purple broken contours show the area of strong energy radiation estimated with MeSO-net data (Honda et al., 2011). Thin black line shows the Japan trench. Black lines denote the location of cross sections in Fig. 4. Iwa: Iwate, Miy: Miyagi, Fuk: Fukushima, Iba: Ibaraki prefecture.

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