News from Ubinas volcano:
Ubinas volcano (Peru): new lava dome grows to 120 m diameter
jeudi mars 27, 2014 18:34 | AUTEUR : T
The new lava dome with high-temperature degassing on 19 March (J. Acosta, Defensa Civil de Moquegua)The volcano's new lava dome continues to grow slowly within the crater. New field observations published yesterday in a detailed report showed that the lava dome is now approx. 120 m in diameter and has completely filled the inner pit left by the explosive activity in 2006 (as of 19 March). Visible glow (even in daylight) indicates very high temperatures.
No explosions have occurred since the vent-clearing explosion on 14 Feb, but the volcano emits a significant plume of steam, SO2 gas and sometimes dilute ash. On 21 and 23 March, the steam-gas-ash plume rose 1800 m above the crater.
On 25 March, light ash falls were reported in the towns of Querapi and Ubinas, as well as strong rumbling noises in distances up to 6 km SE.
Seismicity remains above background with frequent earthquake swarms related to internal fluid movements.
According to IGP, the intensity of the current activity overall is still low and probably continues for a while at similar levels, although explosions (caused, for instance, by trapped gasses under the lava dome) could occur at any time.
- REPORTE N°11-2014 RESUMEN DE LA ACTIVIDAD ENERO-MARZO 2014 DEL VOLCÁN UBINAS (IGP report in pdf)
jeudi, mars 13, 2014
Weak ash emissions could be occurring at the volcano, recent webcam images suggest. VAAC Buenos Aires (one of the less busy VAAC centers) issued an alert in any case. [details]
vendredi, mars 07, 2014
A pilot reported a possible ash plume at flight level 290 (29,000 ft, 9 km altitude) this afternoon, which would mean a significant eruption took place. However, this needs to be confirmed yet. ... [details]
mardi, mars 04, 2014
According to the Geophysical Institute of Peru (IGP), magma has arrived near or at the crater of the volcano. This is indicated by a recent swarm of hybrid earthquakes and a weak thermal anomaly that has been detected at the summit during the past 3 weeks. ... [details]
dimanche, févr. 16, 2014
The volcano could be in the process of entering a new eruptive phase. Two small (likely phreatic) explosions occurred last Friday at 13:46 and 14:45 h local time (18:46 and 19:45 GMT), ejecting plumes of ash and steam rising approx. 1.5-2 km. A strong sulfur smell was noticed in up to 5 km distance. ... [details]
lundi, févr. 03, 2014
Two small earthquake swarms occurred in January, the latest bulletin of the Peru's Geophysical Institute (IGP) reports. The first one happened between 8-9 Jan, and the second and stronger one on 25 Jan. In addition, bluish degassing (SO2, an indicator of the presence of magma) was observed. ... [details]