September 8, 2022 — Mauna Loa Sulphur Cone MultiGas Station Maintenance

Sulphur Cone, high on the Southwest Rift Zone of Mauna Loa, was blanketed by sulfur crystals when it was named in 1921. A subsequent visit noted that molten sulfur had flowed down the flank of the cinder and spatter cone. The remnants of that yellow flow can be seen here on the flank of the cone. Heating along the fissure of the voluminous 1950 eruption of Mauna Loa may have melted the accumulated sulfur around the Cone creating molten flows. For more information, see this "Volcano Watch" article: https://www.usgs.gov/observatories/hvo/news/volcano-watch-peculiar-flow-sulphur-cone-along-mauna-loa. USGS image by T. Elias.