December 27, 2020—Kīlauea summit eruption reference map

The ongoing eruption at Kīlauea Volcano's summit, within Halema‘uma‘u crater, has formed a lava lake that is now being fed by one fissure at its western end. The lake reached its greatest height and extent on December 25, but draining into the now-inactive north vent lowered the lava level by several meters (yards). This left a berm of lava that now bounds the slightly smaller lake, within which there are several islands, the two largest of which are marked in yellow. A dashed blue line indicates the extent of the water lake that existed in the crater until December 20, and a dashed black line indicates the extent of the 2008–2018 lava lake in Halema‘uma‘u.