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Geoscience Letters

Official Journal of the Asia Oceania Geosciences Society (AOGS)

Fig. 7 | Geoscience Letters

Fig. 7

From: Preceding seismic activity and slow slip events in the source area of the 2011 Mw 9.0 Tohoku-Oki earthquake: a review

Fig. 7

Space-time plot of earthquakes detected by the waveform correlation method using template earthquakes during the period from February 13, 2011, to the Tohoku-Oki earthquake [2]. Event locations are shown in terms of the distance along an axis parallel to the trench axis (vertical axis) by blue circles scaled to magnitude. Red and green stars denote repeating earthquakes. The large black and yellow stars are the Mw 9 mainshock and the Mw 7.3 largest foreshock, respectively. (Inset) Temporal variations in seismicity rate inside and outside of the Earthquake Migration Zone (EMZ) after the Mw 7.3 foreshock. The range of the EMZ is shown on the right. The red arrow shows onset of an SSE that started c. 1.5 days before the Tohoku-Oki earthquake

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