Colorimeter data for the summit water lake at Kīlauea Volcano, Island of Hawaiʻi, 2020
In 2018, a large effusive eruption on the lower flank of Kīlauea Volcano was associated with collapse and subsidence of the summit caldera floor (Neal and others, 2019).  The bottom of Halemaʻumaʻu, a crater nested within the summit caldera, subsided by more than 500 m.  In July 2019, water was observed ponding on the …