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Fig. 1 | Earth, Planets and Space

Fig. 1

From: Systematic difference between first-motion and waveform-inversion solutions for shallow offshore earthquakes due to a low-angle dipping slab

Fig. 1

Map and focal mechanisms of target earthquakes. a Map of southwest Japan and estimated focal mechanisms, b distribution of first-motion polarizations during the 2016 Off Mie earthquake. Gray squares in (a) are locations of Hi-net stations. Black triangles are locations of F-net stations used in waveform comparisons (Fig. 3d). Red and blue focal spheres represent focal mechanisms of the moment tensor solution and those of the first-motion solution, respectively. Blue isodepth lines of the upper surface of the Philippine Sea plate are shown at 10-km intervals (Baba et al. 2002; Hirose et al. 2008). The yellow star represents the epicenter of the 1944 Tonankai earthquake provided by the JMA catalog. Dashed lines in (b) represent the isodistance lines with an interval of 50 km from the epicenter of the 2016 Off Mie earthquake

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