Fig. 2From: The thermal signature of Aso Volcano during unrest episodes detected from space and ground-based measurementsThe active ash-plume above Nakadake on January 18, 2015, during a period of sustained Strombolian activity. The plume reaches approximately 600 m above the active crater. Photograph taken from Unzen volcano looking ENE along the Bebbu–Shimabara graben. In the foreground the Shimabara BayBack to article page