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

GAK veröffentlichte eine Reihe von Fotos mit der neuen Tätigkeit bei Anak Krakatau. Ein Lüfter des S Flanke des Gipfels Kegel als Grube Krater um den 23. Oktober befindet; (?) Auf rund 25 Oktober, phreatic und wahrscheinlich phreatomagmatischen Ascheeruptionen ging von diesem Ort, Herstellung Aschewolken 200-300 m hoch, und die auftretenden in Abständen von 3-6 Minuten.

Während der letzten Tour " vom Stromboli zum Ätna "beobachteten wir milde zu Explosionen von Stromboli moderieren. Die aktivsten vent scheint in der ehemaligen zentralen Krater, mit gewaltigen Explosionen warfen glühende Material bis zu 200 m Höhe über dem Krater und oft draußen auf der N-und NE-Flanken. Andere Öffnungen in den östlichen und westlichen Teil des Kraters gelegentlich ausbrechen mit lautem Knallen und laute zischende Geräusche von starken Gasstrahlen produziert.

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.

Unser Führer Doni aus Indonesien gerade berichtet neuen Eruptionen auf Anak Krakatau und dass es neue Krater auf, die Vulkaninsel. Auch Soputan Vulkan ist immer aktiv in den letzten Tagen.

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 reported that seismic activity at Shiveluch was above background
levels during 12-19 October. Based on seismic interpretation, ash
plumes rose to an altitude of 6.5 km (21,300 ft) a.s.l. and small hot
avalanches occurred. Observations of video footage indicated that gas
and occasionally ash plumes rose to altitudes of 5.5 km (18,000 ft)
a.s.l. during 11-12 and 14-15 October. Based on observations of
satellite imagery, ash plumes drifted E on 12, 14, and 16 October and
a thermal anomaly was present in the crater every day during the
reporting period.

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.
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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.

...mehr [alles lesen]

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

Bei einer unserer letzten Touren konnten wir wieder die normale Strombolianische Tätigkeit des Vulkans feststellen, die sich in drei Kratern innerhalb des Kraterkomplexes ereignet. Die Abstände zwischen den einzelnen Eruptionen liegen bei ca. 10-20 Minuten. Glühendes Material wird in eine Höhe von ca. 50-150 m geschleudert. Der Zentralkrater schleudert fast dauernd Lavafetzen in die Umgebung.

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.