Fig. 1From: Source mechanism of a VLP event immediately before the 2014 eruption of Mt. Ontake, JapanStation network around Mt. Ontake. The square, diamonds, and circle represent stations operated by Nagoya University, Japan Meteorological Agency (JMA), and Nagano prefecture, respectively. Open and closed symbols are short-period (natural period 1 s) and broadband seismometers, respectively. The triangle represents the summit of Mt. Ontake. Gray lines are topographic contours (interval 200 m) and the dashed line represents the boundary between Nagano and Gifu prefectures. Labels on the topographic contours represent elevations (m) above sea level. Inset indicates the location of Mt. OntakeBack to article page