New photos from Ol Doinyo Lengai by Tim Leach about three weeks old. [lire toutes]

GAK published a series of photos showing the new activity at Anak Krakatau. A vent located on the S flank of the summit cone formed as pit crater around 23 October; on around 25 October, phreatic (?) and probably phreatomagmatic ash eruptions started from this location, producing clouds of ash 200-300 m high, and occurring at intervals of 3-6 minutes.

Au cours d'un récent voyage"Du Stromboli à l'Etna" Nous avons observé des explosions légères à modérées du volcan Stromboli. La bouche la plus active semble être située dans l'ancien Cratère central, avec de puissantes explosions, expulsant du matériel rougeoyant jusqu'à 200 m de haut au-dessus du cratère et souvent en dehors des flancs N et NE. Les autres évents dans la partie est et ouest du cratère entrent en éruption occasionnellement avec des émissions intenses de forts bruits de sifflement, produits par des puissants jets de gaz.

Lengai volcano as seen from the north-east on 27 Oct 07: thick plumes of ash rise from the active crater and recent ash and lava deposits can be seen on the flank.

Our guide Doni from Indonesia just reported new eruptions at Anak Krakatau and that there are new craters on that volcano island. Also Soputan volcano is getting more active the last days.

Ash plumes from Ubinas rose to altitudes of 5.5-7.3
km (18,000-24,000 ft) a.s.l. and drifted NW and NE during 19-20 and
22-23 October.

IG reported that ash plumes from Tungurahua, occasionally noted after
explosions, rose to altitudes of 5.5-9 km (18,000-29,500 ft) a.s.l.
during 17-23 October. Plumes drifted all directions, except to the E
and SE. On 17 October, incandescent material propelled from the summit
by explosions fell onto the flanks. A resultant ash plume drifted W.
Fumarolic activity was noted on the NW flank. During 17-18 October,
ashfall was reported from areas to the NW, N, and SW. On 19 October,
lahars descended NW drainages and consequently the road between Ambato
and Baños was closed.

Based on information from JMA, the Tokyo VAAC reported that an
eruption plume from Suwanose-jima rose to an altitude of 1.5 km (5,000
ft) a.s.l. on 22 October and drifted W. Ash was not visible on
satellite imagery.

On 17-23 October lava-dome growth at Mount St. Helens continued.
Seismicity persisted at low levels, punctuated by M 1.5-2.5, and
occasionally larger, earthquakes. Clouds occasionally inhibited visual
observations.

MVO reported that during 17-23 October the lava dome at Soufrière
Hills changed very little, based on visual observations. Seismic
activity was very low and low-level rockfall activity continued. On 12
October, a small pyroclastic flow descended about 2 km E down the Tar
River valley. A resultant ash plume drifted W. On 23 October, lahars
descended down drainages on all sides of the volcano. The Alert Level
remained elevated at 4 (on a scale of 0-5).

KVERT a signalé que l'activité sismique à Chiveloutch était au-dessus de fond
niveaux durant 12-19 octobre. Basé sur l'interprétation de données sismiques, cendres
plumes roses à une altitude de 6,5 km (21 300 pieds) d'altitude et petits chaud
avalanches s'est produite. L'observation des séquences vidéo indique que le gaz
et parfois les panaches de cendres ont augmenté à des altitudes de 5,5 km (18 000 pi)
a.l.s. durant les 11-12 et 14 et 15 octobre. Basée sur des observations de
imagerie satellite, cendres plumes drifted e sur 12, 14 et 16 octobre et
une anomalie thermique était présente dans le cratère chaque jour durant la
période de déclaration. ...plus [lire toutes]

RVO reported that white vapor plumes rose from Rabaul caldera's
Tavurvur cone during 17-22 October. Ash plumes rose to altitudes of
1.2-4.7 km (3,900-15,400 ft) a.s.l. during 17-18 October and drifted S
and NNW. Ashfall was reported from areas downwind on 17 October. The
ash emissions were intermittently accompanied by roaring noises, and
incandescence at the summit was observed during the reporting period.

HVO reported that during 17-23 October fissure segment D from
Kilauea's 21 July fissure eruption continued to feed an advancing lava
flow that frequently overflowed its channel edges. Activity was
concentrated at the NE end of the channel where 200-500-m-long
pahoehoe lobes built out in a fan shape to the NW, N, and SE. On 23
October, a lava flow traveled 1.5 km and entered the remains of a
kipuka along the N margin of the flow field. A few small earthquakes
were located beneath Halema'uma'u crater and the S flank during the
reporting period.

It was reported that seismic activity at Karymsky was above background
levels during 12-19 October and based on seismic interpretation, ash
plumes have risen to an altitude of 4.3 km during the reporting period. A thermal anomaly was present in the crater during 14-18 October and ash plumes drifted E during .

Based on a pilot report, the Darwin VAAC reported that a plume from
Karangetang rose to an altitude of 1.5 km (5,000 ft) a.s.l. on 21
October. A plume was not detected on satellite imagery due to cloud
cover.

Ash plumes from Chikurachki were visible on
satellite imagery on 17 and 18 October. The Level of
Concern Color Code remained at Orange

CVGHM reported that the Alert Level for Kelut remained at 4 (on a
scale of 1-4) during 17-23 October. According to news articles,
several thousand evacuated people remained in shelters.

It was reported that seismic activity at Bezymianny was slightly
elevated during 16-19 October and returned to background levels during
19-20 October.  Also a strip of ash deposits was noted on the ESE flank on 18 October and a thermal anomaly was present in the crater during 16-20 October.

The Alert Level at Ruapehu was lowered to 1 (on a scale of 0-5) on 9 October because no further eruptions have occurred since the activity on 25 September.

Infrequent, mostly small ash eruptions continue at Reventarod volcano. On 11 October, the volcano produced an ash plume that rose to an altitude of 4.6 km (15,000 ft) a.s.l. and drifted S.

Fuego volcano continues its moderate strombolian activity; INSIVUMEH reported frequent explosions such as on 10 October that produce ash plumes rising to to altitudes of 4-5 km (13,000-16,400 ft) a.s.l. and mostly drifiting N and NW. 
The explosions are often accompanied by rumbling noises and jet-engine like sounds. Avalanches of collapsing spatter from the growing cone in the inner crater descend W into the Taniluyá and Santa Teresa ravines.
---
Source: INSIVUMEH

The Center of Volcanology and Geological Hazard Mitigation (CVGHM) raised the altert status of Kelut volcano on 16 October from 3 to 4 (on a scale of 1-4). During 15-28 September, gas discharge from the crater lake increased and spread in a radius of 5 m. Inflation around the summit occurred during 13-16 October. On 16 October, the temperature in the crater lake increased to 37.8 degrees C.

...plus [lire toutes]

Recent photos of Ol Doinyo Lengai eruptions in September 2007 by MartinAir-Pilot Jelle Schouten and his Co-Pilot Stan Brouwer you can find now at the "Volcano Photo Gallery" at this link: Air Photos of Ol Doinyo Lengai

Comme on a pu l’observer au cours de notre récente visite, le volcan Stromboli produit son activité strombolienne, légère à modérée depuis les 3 principaux évents à l'intérieur du cratère complexe. À des intervalles allant de 10 à 20 minutes, des explosions projettent des matériaux incandescents jusqu’à des hauteurs de 50 à 150 mètres. De plus, la bouche du cratère central actuelle montre une activité de spattering quasi permanente.

The Canadian navy ship H-M-C-S Toronto is conducting a search-and-rescue operation to find the 9 people lost after a catastrophic eruption of jebel al Tair volcano on September 30. It is told that the eruption hit the 3 km long island about 7 pm local time. There are about five NATO ships in the area. Lava is spewing hundreds of meters in the air and a few kilometers high ash column is to be seen.