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

Fig. 1

From: Source fault model of the 2018 Mw 5.6 northern Osaka earthquake, Japan, inferred from the aftershock sequence

Fig. 1

Tectonic map of the study region and recent seismicity. The red star indicates the mainshock epicenter. The focal mechanism was constrained using the P-wave first-motion data (gray beach ball) and CMT solution (red beach ball) estimated by JMA. The black and blue dots denote the epicenters determined by JMA before (from 1 January 2001 to 17 June 2018) and after (from 18 to 30 June 2018 in the study area) the mainshock rupture, respectively. The yellow squares denote the permanent seismic stations used in the analysis. The Arima-Takatsuki (ATF), Ikoma (IKF), and Uemachi (UMF) fault zones are shown as thick purple lines, and the other major active faults are shown as thin purple lines. The inset shows a regional map of the studied area. NKTZ (red shading) denotes the Niigata–Kobe Tectonic Zone, as identified by the GNSS network (GEONET)

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