Toutes les actualités et mises à jour sur les volcans:
The eruption at Nyamuragira volcano continues. Protected by military from the OCHA and MONUC missions, scientist from OVG could overfly and visit the eruption area on 29 Nov. Their report (kindly provided by Kasereka Mahinda, director of OVG, and other staff at OVG), is summarized:
The location of the eruptive fissure is between the vents of Nyamuragira's eruptions in 1986 (Kitazungurwa: KT) and 2001 (Amani: AM).
During the first day of the eruption, lava flows have already travelled 10 km (!) towards the west. If the eruption continues, the flow is likely to cut the major E-W artery road from Sake to Goma lifeline. Because of the important production of toxic ash from the lava fountains, GVO warns the population of the possibility of acid rain, ash-contaminated water and crops. During its eruption in 2000, 17 people were reported killed because of drinking from ash-continaminated water sources, as well as a large number of failed pregnancies. In addition, large damage was afflicted to crops and lifestock.
Ubinas volcano continues to erupt ash producing plumes rising to 4-6 km....plus
IG reported that during 21-28 November, emissions from Tungurahua produced ash and steam plumes that reached altitudes of 6-9 km (19,700-29,500 ft) a.s.l. and drifted predominantly NW and W. Ashfall about 1 mm thick was reported from areas 8 km WSW on 21 November and from areas 8 km W on 25 November.
During 26-27 November, Strombolian activity propelled incandescent material up to 600 m above the summit. Blocks rolled 2 km down the flanks. Lightning was visible in an ash plume that reached 7 km (23,000 ft) a.s.l. and ashfall was reported from areas 8 km WSW. On 27 November, an ash plume rose to 9 km (29,500 ft) a.s.l. and drifted W.
During 17-24 November, lava-dome growth at Soufrière Hills continued and was concentrated on the NE part of the edifice. Ash venting originated from the westernmost of two cracks in the curved back of the shear E-facing lobe on the summit. Rockfalls and small pyroclastic flows traveled down the SW and NE flanks. Pyroclastic flows reached both the upper region of Tuitts Ghaut (N) and the sea via the Tar River Valley (E) on 23 November. An explosion produced an ash plume that rose to altitudes of 1.5-1.7 km (4,900-5,600 ft) a.s.l....plus [lire toutes]
Based on a pilot report, the Darwin VAAC reported an ash plume riging to 7.6 km (25,000 ft) on 22 November, drifting to the S. Various other reports and news sources indicate that the crater's typical strombolian is relatively powerful these days and that blocks and bombs are frequently ejected outside the crater.
Eruptions continue at Langila volcano from its Crater 2 with continuous emissions of gray ash plumes rising to altitudes of ca. 2-3.5 km and drifting predominantly to the W and NW.
According to the Darwin VAAC, an eruption at Karangetang on 24 November produced a small ash plume observed on satellite imagery that reached an altitude of 3 km (10,000 ft) a.s.l.
A new episode of strong ash production, probably accompanied with strombolian activity from the SE crater took place in the morning of 29 November. Today (30 Nov.), no ash is visible. The lava flow in Valle del Bove from the 2800 m vent continues to flow. During the night, a number of breakouts and open channels are clearly visible....plus
One of the world's largest volcanoes, mighty Nyamuragira (also spelled Nyamulagira) in eastern Congo, is in eruption again. The eruption began around 10 pm local time on Monday, 27 Nov. 2006 as press reports.Observation of the eruption is difficult because of the unrest in the region. The area around Nyamuragira is difficult to access and home to a number of armed rebel troops notoriously opposing the government army.
The volcano, notorious for its fluid lava, last erupted in 2002 and 2004, sending lava flows into mostly uninhabited forest and farm land.
Etna's SE crater continued to spew ash plumes travelling SE and forcing the closure of Catania's airport for the 4th consecutive day. Reopening is scheduled for Tuesday 28 Nov.