Sinabung volcano videos: 24-28 July 2015View of the active lava dome of Sinabung volcano on the morning of 27 July. Two active lava lobes of viscous (sticky) lava are descending on the SE and E upper flanks, generating small rockfalls with increasing frequency. Shortly after, the first of a series of pyroclastic flows occurred (s video below).
The growing lava dome at Sinabung volcano consists of sticky lava accumulating in the summit crater and descending as thick lobes on the SE and E flanks. When these become unstable, parts collapse into avalanches, which turn into hot, turbulent mixtures of gas and lava rock fragments of all sizes disintegrating into fine ash.
This flow occurred around 12:20 local time on 27 July 2015 on the eastern flank. (video taken by Ingrid Smet)
The next morning, more pyroclastic flows could be observed:
Close-up of the advancing front of a pyroclastic flow on Sinabung volcano on 28 July. Video taken by Ingrid Smet.
Zoom onto the highly turbulent an fluid flow front of a pyroclastic flow: