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Sinabung volcano (Sumatra, Indonesia): increasingly frequent explosions, pyroclastic flows

lun., 29 févr. 2016, 09:15 09:15 AM | AUTEUR : T
Explosion from Sinabung on 25 Feb (image: Endro Lewa / facebook)
Explosion from Sinabung on 25 Feb (image: Endro Lewa / facebook)
Eruption with lightning on 25 Feb (image: Endro Lewa / facebook)
Eruption with lightning on 25 Feb (image: Endro Lewa / facebook)
Explosion at Sinabung yesterday (image: Endro Lewa / facebook)
Explosion at Sinabung yesterday (image: Endro Lewa / facebook)
Destroyed houses in Simacem (photo: Andi / VolcanoDiscovery Indonesia)
Destroyed houses in Simacem (photo: Andi / VolcanoDiscovery Indonesia)
Over the past days, activity at the volcano seems to have picked up. The frequency and size of explosions from the summit have increased and generated several ash plumes that rose up to approx 3 km height above the summit.
In addition, collapses of parts of the lava lobe generated small to moderate pyroclastic flows that traveled up to 3 km down on the ESE side. One of them on Saturday reached again the (already mostly destroyed and abandoned) village of Simacem on the ESE flank at only 3 km distance from the crater.
Whether this apparent increase in activity caused by and actual increase in magma and or gas output, or simply a process of releasing accumulated pressure and instabilities on the already emplaced lava lobes on the steep flanks of the volcano is unclear.
For the local population, this means the long-lasting (more than 2 years now) crisis has no end in sight: the exclusion zone of 4-5 km radius around the volcano (depending on which sector) remains in place. More than 9500 people evacuated from villages in this risk area continue to live in a total of 9 now semi-permanent shelters.

Actualités précédentes

mer., 24 févr. 2016, 06:00

Sinabung volcano (Indonesia) - Smithsonian / USGS Weekly Volcanic Activity Report for 24 February-1 March 2016 (Continuing Activity)

Based on satellite images, ground reports, and information from PVMBG, the Darwin VAAC reported that during 24 February-1 March ash plumes from Sinabung rose to altitudes of 3.6-4.3 km (12,000-14,000 ft) a.s.l. and drifted over 45 km in multiple directions. ... Read all
mar., 23 févr. 2016, 11:27

Sinabung volcano (Sumatra, Indonesia): continuing intermittent explosions and pyroclastic flows

Explosion at Sinabung yesterday evening 18:19 local time (Image: @BeidarSinabung via Leopold Kennedy Adam / twitter)
The volcano continues to erupt with little changes overall: the activity consists of slow extrusion of viscous lava, interrupted by intermittent explosions (every few days on average) caused by sudden pressure release of trapped pressurized gasses. An explosion this morning was reported to have produced an ash plume that rose to 14,000 ft (4,2 km) altitude and drifted NW. Read all
Montrer plus
Sinabung volcan
Stratovolcano 2460 m (8,071 ft)
Sumatra, Indonesia, 3.17°N / 98.39°E
Condition actuelle: en vigilance - niveau agité (2 sur 5) Eruptions du volcan Sinabung:
2013-ongoing, 2010
Style éruptif tipique
Explosive
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