Volcano Watch: A forgotten collapse of Halemaʻumaʻu crater

USGS photo View of the walls of Halemaʻumaʻu during the crater collapse of June 5, 1916, looking northeast from the south side of the crater. The lava lake is visible at the lower left, and the outer crater walls are at the top.

Last month, a Volcano Watch article highlighted a lesser-known Mauna Loa eruption that ended May 31, 1916. Hawaiian Volcano Observatory staff had to make a quick turnaround a week later when Kilauea Volcano’s Halema‘uma‘u crater began to subside. A series of collapse events took place from June 5–7, 1916, and observers described it as one of the most spectacular occurrences they had ever witnessed at Kilauea.