Voggy skies from days gone by: reviewing Kīlauea Volcano's gas release

In mid-July 2018, fissure 8 (shown here) on Kīlauea 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. USGS photo by T. Elias.