Volcano Watch: Voggy skies from days gone by — reviewing Kilauea’s gas release

T. ELIAS/US Geological Survey photo

In mid-July, fissure 8 on Kilauea volcano’s lower East Rift Zone was emitting more than 50,000 tons of sulfur dioxide gas per day, creating high levels of vog on the island. Since early August, lower East Rift Zone SO2 emissions have dropped to less than 100 tons per day, resulting in better air quality for Hawaii.

Many Hawaii Island residents are familiar with the volcanic air pollution known as vog. The main culprit in the formation of vog is sulfur dioxide gas released from Kilauea’s eruptions (see vog.ivhhn.org/what-vog for more information).