Fig. 2From: Ground water-induced changes in velocities of P and S waves (Vp and Vs) measured using an accurately controlled seismic sourceLocations of the ACROSS source and observation stations. The red circle and blue squares indicate the locations of the ACROSS source and seismic stations, respectively. The yellow triangles denote the AMeDAS stations used for rainfall measurements. The ground water observation wells are shown as orange circles. The black arrow indicates the direction of horizontal vibration of the ACROSS source. The map data were provided by the Geospatial Information Authority of JapanBack to article page