Dempo volcano (Sumatra, Indonesia): seismic unrest, alert level raised
Wed, 29 Apr 2015, 21:2121:21 PM | BY: T
PVMBG raised the alert level of the volcano to 2 (waspada, "watch" on a scale of 1-4) because of increased seismic activity (mainly tremor and volcanic-tectonic earthquakes).
Seismicity at Dempo volcano (PVMBG)
It is recommended not to approach the crater within 1 km.
The volcano's crater contains a large acid lake and a very active hydrothermal system. Phreatic or phreatomagmatic explosions could occur any time and would pose a significant risk.
The last eruptions in 2006 and 2009 were both phreatic.
Wed, 29 Apr 2015, 06:00
Dempo volcano (Indonesia) - Smithsonian / USGS Weekly Volcanic Activity Report for 29 April-5 May 2015 (New Activity / Unrest)
Observers at the PVMBG Dempo observation post reported that during 0730-0900 on 27 April diffuse gray-white plumes rose 50 m above Dempo crater. Seismicity had increased during April as compared to the previous month. On 29 April the Alert Level was raised to 2 (on a scale from 1-4). ... Read all
Sat, 18 Aug 2012, 10:05
A possible eruption reported on 18 Aug in a VAAC report mentioning a possible ash plume to 30,000 ft was confirmed to be false. ... Read all