Sinabung volcano (Sumatra): eruption news and activity updates
Sinabung volcano (Sumatra, Indonesia): volcanologists believe increased magma supply
Tue, 11 Aug 2015, 09:4809:48 AM | BY: T
According to a news article in the Indonesian press, volcanologists monitoring Sinabung believe that magma supply to the growing lava dome has recently increased.
Map of Sinabung with the exclusion zone
This will likely result in more and larger pyroclastic flows that can threaten a number of villages that so far have been unharmed. These include Pasarpinter Gurkinayan, Simpang Sibintun, Perjumaan Batukejan, Jembatan Lau Benuken Tigapancur, Pejuman Tigabogor, Pentumbes, Jeraya, and Kutatengah on the SE slope.
The volcano is kepts at the highest alert status ("awas" or 4 out of 4) and an exclusion zone of 7 km is kept in place.
At the same time, only smaller collapse events and a small pyroclastic flow on 7 Aug have occurred during the past week. Most of the previous lava dome and its dangerous lobes clinging onto the steep upper slopes had been destroyed by the collapses in late July and the first days of August.
This apparent calm, however, could make things only worse, as it gives a false sense of safety. Indonesian volcanologist warn that there should be no activities inside the 7 km radius zone (something which is not being observed at all, however).
The evaluation of the situation comes from a drastic increase of certain kinds of earthquakes detected under the volcano, so called low-frequency events that are indicators of internal fluid movements. Their numbers rose from a few events per day to several hundred on Saturday - a clear sign that something had changed inside the volcano, likely a batch of new magma had started to move towards the vent.
Links / Sources:
Links / Sources:
- Pergerakan Magma Sinabung Meningkat (Kompas)
Tue, 4 Aug 2015, 15:56
At least two pyroclastic flows occurred today at the volcano, continuing the destruction of the steeply emplaced lava lobes on the upper SE and E side. read all
Fri, 31 Jul 2015, 14:37
Sinabung volcano (Sumatra, Indonesia) update: pyroclastic flows continue destruction of eastern lava lobe
A series of small to medium-sized pyroclastic flows occurred yesterday as a result of the ongoing destruction of the unstable lava lobe present on the upper eastern flank. read all
Tue, 28 Jul 2015, 10:07
A series of pyroclastic flows yesterday noon (see previous post) and this morning destroyed a part of the eastern lava lobe. ... read all
Mon, 27 Jul 2015, 08:35
Activity has remained essentially unchanged. Effusion of viscous lava continues at slow pace to feed the lava dome with two active lobes on the SE and E upper flanks. At 12:22 local time today, a small part of the eastern lobe collapsed into a medium-sized pyroclastic flow that traveled approx. 2.5 km towards the outskirts of the (already evacuated and destroyed) villages of Bekerah and Simacem. ... read all
Sun, 26 Jul 2015, 15:41
During the past 2,3 days, the volcano has been relatively calm and not produced pyroclastic flows, only small rockfalls from two lava lobes, a smaller and a much larger one, overspilling to the SE and ENE, respectively read all