Global Volcanism Program | Image GVP-06511
The empty, vegetation-free crater of Kelut volcano is seen here from the SW-side overflow on 20 May 1966, less than a month after a devastating eruption. A brief but powerful explosive eruption 26-27 April produced pyroclastic flows that swept 9 km from the summit and deadly lahars that reached up to about 30 km along river drainages on the south-NW sides. As with many other Kelut eruptions, it occurred without warning. No signs of an impending eruption were noted during a visit to the summit crater only two days earlier.
Photo by I. Suryo, 1966 (Volcanological Survey of Indonesia).