Today’s eruption occurred at a popular ski resort northwest of Tokyo.
Increased volcanic activity began on Saturday, and officials warn that a hazardous eruption could occur within weeks, or even days.
Sileri Crater is within the Dieng Volcanic Complex, in central Java. Indonesia as a whole has the most active volcanoes of any country on earth.
Recent activity at Poás Volcano in Costa Rica is considered “out of the ordinary” by Professor J. Maarten de Moor at the Observatorio Vulcanologico y Sismologico de Costa Rica.