Halema‘uma‘u lava lake surface foundering, Kīlauea — May 10, 2021

A telephoto view of the active lava surface in Halema‘uma‘u at the summit of Kīlauea. While less frequent than previous weeks, crustal foundering on the active surface of the lava lake persists. Field crews observed this foundering event on Monday afternoon, May 10. It only lasted a few minutes and was approximately 30 m (100 ft) across. USGS photo by B. Carr.