Lava fountaining in Halema'uma'u crater—October 12, 2021
Lava continues to erupt from the western vent in Halema‘uma‘u. On October 12, a short-lived vent (erupting for approximately 10 hours) was present to the north of the main vent (right). Lava fountaining from the main vent was 10–15 meters (30–50 ft) above the lake surface, with larger bursts exceeding the height of the cone (30 meters or 100 ft). Fountaining at the smaller vent to the north was about 3 meters (10 ft), with spatter reaching 10–15 meters.