News & erupion updates from Dieng volcano:
Dieng volcano (Java, Indonesia): small phreatic eruption injures 17 people, but rescue helicopter crash kills 8
Monday Jul 03, 2017 15:12 PM | BY: T
Steam from the Sileri crater (Dieng volcano) during yesterday's eruption (image: Dok via SuaraMerdeka)A sudden steam-driven explosion (phreatic eruption) occurred yesterday from the Sileri crater in the Dieng volcanic complex, injuring several people. According to BNPB (Civil Protection), 17 people suffered mostly minor injuries (burns, fractures, cuts) and at least 10 were transported to a hospital.
The eruption occurred at 11:54 local time and ejected a column of steam, gasses and mud which fell in up to 50 m distance from the crater.
As typical for this kind of explosions, there is little to no warning: they are triggered by complex interactions in the shallow hydrothermal system that lead to a mass of pressurized fluids (mainly water) become overheated and to suddenly flash into steam. In the case of yesterday, a warning had been in place since late June not to approach the crater within 100 m, as degassing activity at the Sileri crater had been elevated for some time; a day before the eruption, park rangers had noticed particular intense activity, with a dense column of steam rising 40 m.
However, there have been no other signs of unusual activity detected in seismic and other monitoring data and the official alert level of the Dieng volcano has been at the lowest (1, normal, on a scale of 1-4). Such phreatic explosions are considered to be a normal phenomenon of this volcano with a particularly and continuously active hydrothermal system.
Access to the area has been temporarily closed.
A similar, but larger eruption had occurred at the Sileri crater on 27 September 2009 affecting an area of 100 meters radius.
Sadly, the eruption claimed indirect victims: A rescue helicopter crashed just minutes before arriving at the scene, killing all 8 people on board.
Links / Sources:
Links / Sources:
- Letusan Freatik Susah Diduga, Dieng Sudah Dipagari Radius 100 Meter (SuaraMerdeka)
- Rescue helicopter crash kills eight after Indonesian volcano erupts (The Guardian)
Thursday, Aug 14, 2014
Alert level was lowered back to normal (1 out of 4). After the peak of the latest crisis in March 2013, activity (in particular gas emission levels) has calmed down to normal levels. [more]
Thursday, Mar 28, 2013
VSI raised the alert level to the third highest level Siaga (3 out of 4), because significant changes were observed at the crater lake. The most spectacular was the change of the lake water color to dark brown on 24 March. ... [more]
Thursday, Mar 14, 2013
During 7-11 March monitoring instruments detected carbon dioxide plumes from Timbang Crater drifting 50-200 m S; the concentration increased during 9-10 March. A strong sulfur odor was also reported, along with dead animals near the crater on 7 March. ... [more]
Monday, Jun 06, 2011
The seismic activity at the the Timbang crater in the Dieng Plateau in Central Java has calmed down, but the monitored CO2 levels are staying dangerously high. [more]
Wednesday, Jun 01, 2011
Timbang crater at Simbar village, Dieng volcano complex, is now on high alert status level 3. Inhabitants are being evacuated from a zone 1 km around the crater. ... [more]