Fig. 7

Graphic summary of the 2014–2017 thermal activity of Aso Volcano by means of satellite and ground-based data; a selected sectors of LANSAT8 images showing the location of the thermal anomalies during different phases of activity within the Nakadake crater; b Time series of radiant power detected by MIROVA (blue stems) and by the FLIR thermal camera (red circles) relative to the fumarole field on the South Area; c Maximum temperature recorded on the South Area (blue) and Central Pit (red), obtained from ground-based thermal cameras. d N–S profiles of thermal index related to the high-resolution images reported above (see Sect. 3.2). Colors refer to the intensity of the thermal anomaly. The positions along the S–N profile indicate what area was thermally active at the time of acquisition