Fig. 1
From: Experiment to distinguish two fumaroles consistently emanating infrasound at Kirishima Iwo-Yama
Kirishima Iwo-Yama and the observation array. a The locations of Kirishima Iwo-Yama and nearby regional meteorological stations. b The locations of the craters (ISC and IWC), vents (Y1–T3, W3, W4), the SI microphone, and the VSA array, modified from Fig. 3 of Tajima et al. (2020). c An overview of the field experiment. c1 The observation geometry consisting of the VSA array (microphones A1–A3) and the SI microphone with respect to the ISC and IWC fumaroles. c2, c3 The topographic features between the VSA array site (white circle) and the IWC fumarole (c2), and the ISC fumarole (c3). c4 The ground dip at the array site. d An image of the ISC fumarole taken from the array location (the camera symbol shown in c1)