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Fig. 1 | Progress in Earth and Planetary Science

Fig. 1

From: Estimation of seismic velocity changes at different depths associated with the 2014 Northern Nagano Prefecture earthquake, Japan (M W 6.2) by joint interferometric analysis of NIED Hi-net and KiK-net records

Fig. 1

a Hypocenter of the 2014 Northern Nagano Prefecture earthquake (focal mechanism). The location of collocated stations N.MKGH (Hi-net) and NIGH17 (KiK-net) is indicated by a white triangle. Blue triangle indicates the location of Futagojima station, which monitors the streamflow of the Seki-river. Black circles indicate hypocenters of aftershocks occurring within 1 week of the N. Nagano earthquake, relocated from data recorded by NIED, JMA, and Nagoya University. Red circles indicate hypocenters of earthquakes used for the deconvolution analysis. Black curves represent borders between prefectures. The colors of grids drawn on the map represent the volumetric static strain change on the ground surface (0 m depth) due to the N. Nagano earthquake, where the fault plane used for the computation is shown by the quadrangle. A minus sign indicates contraction. Colors of grids drawn on the cross-section correspond to volumetric static strain changes along the broken line in the map. b Schematic description of the installation of Hi-net and KiK-net sensors at stations N.MKGH and NIGH17

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