Sinabung volcano (Sumatra): eruption news and activity updates
Sinabung volcano (Sumatra) - increasing seismic activity, red alert
Tuesday Dec 17, 2013 16:29 PM | BY: T
Degassing from Sinabung volcano this morning (VSI webcam)
The Indonesian Volcanological Survey (VSI) informed in its latest press release that a significant increase in seismic activity was detected during the past days.
Seismic statistic over the past weeks (VSI)
While the volcano has been relatively calm at the surface, producing only a dilute gas plume with some ash reaching about 1 km above the crater, the increase in earthquakes suggests that new magma is currently rising and could produce new (potentially large) explosions.
In particular, low-frequency and so-called hybrid earthquakes, typical of fluid movements inside the volcanic edifice, have climbed to almost one 1000 per day. Continuous volcanic tremor (internal vibration) at medium levels has also been detected over the past days.
Deformation measurements with tilt-meters on the northern and eastern flank and EDM (electronic distance meters) show a fluctuating trend of inflation, suggesting the presence of an intruding magma body at shallow depth. Gas and temperature measurements are not conclusive from the VSI report, as quality / temporal coverage are insufficient.
The exclusion zone was extended to 5 km radius, and the volcano remains on highest alert level and Aviation Color Code Red, because explosive eruptions with high-level ash clouds could occur any time.
Links / Sources:
Links / Sources:
Thursday, Dec 12, 2013
No ash emissions have been detected during the past 48 hours, the crater shows only a degassing plume, but alert level remains at red, because new explosions could occur any time. The government has extended the emergency status until at least 21 December, which implies that the more than 17,000 evacuees remain in the total of 31 shelters. Their situation is difficult, with help needed in form of food, water, medicines and sanitary supplies. ... [more]
Tuesday, Dec 10, 2013
After a relatively calm period, a large vulcanian explosion occurred at the volcano this morning (04:30 GMT). VAAC Darwin reports an ash plume to 38,000 ft (12 km) altitude drifting 50 nautical miles to the NW. ... [more]
Thursday, Dec 05, 2013
Activity has remained similar as during the past week with ongoing frequent mild to moderate ash emissions, but no larger explosions. [more]
Tuesday, Dec 03, 2013
Moderate ash emissions continued today, with estimated plume heights of 12,000 ft (3.6 km) altitude. [more]
Monday, Dec 02, 2013
Activity continues at relatively mild levels. Numerous small explosions and ash emissions occurred today, producing plumes reaching up to 15,000 ft (4.5 km) altitude: ... [more]