William Kumanichi reports that Mt Aso is acting up a bit and provides two lovely photos. The article describes a “fire phenomenon” in which high-temperature volcanic gas ejected from underground causes the walls of a crater to become red-hot. The Japan Meteorological Agency raised the eruption alert level from 1 to 2 (restrictions around the crater) and warned of risk of volcanic blocks and pyroclastic flows within a radius of about 1 km from the crater. Click on the photos for a better view. https://kumanichi.com/articles/1347306