Fig. 2
From: In-situ monitoring of 3He/4He in summit gases of Kilauea Volcano (Hawaii) prior to the 2020 eruption
Photographs of the December 2020 deployment. (a) Solar-power equipped HIM Station with additional rain protection, looking east. (b) Internal layout (see text for detailed description of components). (c) Wide view of Sulfur Bank, looking NW. The Old Well fumarole is circled in red and the HIM solar station, which is located approximately 9 m S-SE on bare ground, is circled in yellow