Fig. 1
From: Kusatsu-Shirane volcano eruption on January 23, 2018, observed using JMA operational weather radars
a Location map of three JMA weather radars (blue dots) around Mt. Kusatsu-Shirane (red triangle). Dashed concentric circles show 100, 200, and 300 km from each radar site, and solid circles show the maximum range of the radars (400 km). b Detailed map around Mt, Kusatsu-Shirane. This area corresponds to the red rectangle in a. Two dashed rectangles show the crater rows [Kagamiike-kita (A) and Kagamiike (B)] of the 2018 eruption. This figure was created based on the map created on the Geospatial Information Authority of Japan website (https://maps.gsi.go.jp/vector/)