Flames Flicker From Kīlauea’s Volcanic Vents As Hydrogen Gas Ignites In Hawaii

Flames flickered from volcanic vents at the summit of Kīlauea during the early morning of October 8, 2026, in a nighttime phenomenon scientists believe is caused by burning hydrogen gas.

The footage was captured by two cameras positioned on the northwest and south rims of Halemaʻumaʻu crater in Hawaiʻi Volcanoes National Park.

The vent complex has been erupting episodically since December 2024, with flames often visible emerging from the vents at night. Scientists believe the hydrogen ignites when it encounters oxygen at the extremely high temperatures around the volcanic openings.

Hydrogen concentrations in and near the vents are generally below 2%, requiring temperatures above about 1,380°F (750°C) for ignition. Kīlauea’s eruptive vents can exceed 1,830°F (1,000°C), providing more than enough heat.

The shape of the vents may also help the process. Small spatter cones and hornitos can act like superheated nozzles, allowing hydrogen-rich volcanic gas to ignite as it mixes with oxygen in the surrounding air.