Kīlauea's summit eruption at 2:15 a.m. HST on December 21

Kīlauea's summit eruption at 2:15 a.m. HST on December 21. From the west rim of Kīlauea caldera, a gas plume can be seen rising from Halemaʻumaʻu crater. This plume is drifting to the southwest with the trade winds. Increased sulfur dioxide (SO2) emission rates associated with new eruption may lead to voggy conditions downwind. USGS photo.