(a)
(b)
(c)
(d)
Figure 4: (a) False color composite (RGB = 742) image of Landsat 7 ETM+ acquired on 30 Jul. 2012. (b) The gap-filled Landsat 7 ETM+ image. (c) Supervised classification map derived from (b). (d) Pyroclastic flow inundation after the 2010 eruption at Sinabung volcano.