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Rinjani volcano
Stratovolcano / caldera 3726 m / 12,224 ft
Lombok, Indonesia, -8.42°S / 116.47°E
Current status: dormant (1 out of 5)
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Rinjani volcano eruptions:
2016 (powerful vulcanian explosion on 1 Aug), 2015, 2010, 2009, 2004, 1994, 1966, 1965, 1953, 1949-50, 1944-45, 1941 (?), 1915, 1909, 1906, 1901, 1900, 1884, 1847
Typical eruption style:
Explosive
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Rinjani volcano (Lombok): news & activity updates

Rinjani volcano (Lombok Island, Indonesia): strong vulcanian explosion on Tuesday

Thursday Sep 29, 2016 10:29 AM | BY: T

Explosion at Rinjani volcano (Image: Santanu Bendesa via CNN Indonesia)
Explosion at Rinjani volcano (Image: Santanu Bendesa via CNN Indonesia)
A powerful, sudden vulcanian explosion occurred at the volcano Tuesday afternoon (14:45 local time). It originated from the Barujari cinder cone inside the Rinjani caldera and generated a dense column of ash and ejected rock fragments that reached a height of 2000 m.
Part of the eruption column collapsed into pyroclastic flows that reached short distances around the cone (less than 1000 m runout length). The ash plume itself drifted quickly southwest, forcing a temporary closure of Lombok's international airport and some flight disruptions (cancellations), in particular on the popular routes between Australia and Bali.

It seems that the explosion was a violent, but isolated and brief event similar to the explosion on 1 August this year. Probably, it was caused by sudden release of over-pressurized gasses trapped inside the conduit as older magma from the recent eruption end of last year continues to cool and release gasses, possibly with the influence of infiltration of rain/lake water. In that case, no new magma itself has caused it and the mechanism is a so-called phreatic event.
According to BVMBG volcanologists, the event was accompanied by a short peak in tremor which has afterwards disappeared. The alert level of the volcano was raised from 1 to 2 (on a scale of 1-4, "waspada": watch). An exclusion zone of 3 km radius around the Barujari cone is in place.
Previous news
Tuesday, Sep 27, 2016
Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: ... [more]
Rinjani's vulcanian eruption yesterday (image: Rindi Rmaniar / Instagram)
Tuesday, Aug 02, 2016
The volcano has remained calm since yesterday's sudden and very violent explosion. ... [more]
Today's ash plume from Rinjani volcano in Indonesia
Monday, Aug 01, 2016
The volcano had a sudden explosive eruption this noon, it seems. An ash plume was detected at 12:20 local time (04:20 UTC) that rose from the volcano to originally estimated 32,000 ft (10 km) altitude and drifted south. ... [more]
MODIS thermal signal from Rinjani (MIROVA)
Wednesday, Dec 16, 2015
It seems that the eruption at the Barujari cone is over. ... [more]
Explosion from Rinjani's Barujari cone on 1 Dec 2015
Saturday, Dec 05, 2015
The volcano continues to erupt, but activity has decreased a lot. When visited during 30 Nov - 2 Dec, "the volcano erupted just 2-3 times eruption per day", but some explosions were fairly big (s. image attached). [more]
 

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