Fig. 1From: Waveform inversion of the ultra-long-period seismic event associated with ground tilt motion during an eruption of Mount Kusatsu–Shirane, Japan, on January 23, 2018Station network around Mount Motoshirane. The blue circles represent the Fundamental Volcano Observation Network (V-net) stations operated by the National Research Institute for Earth Science and Disaster Resilience (NIED). The triangles and the blue square represent the summits and a recently active crater lake, respectively. The red square indicates the region depicted in Fig. 2. The inset indicates the location of Mount Kusatsu–Shirane at a regional scaleBack to article page