Seismic data indicated an explosive eruption at Bezymianny on 30 November. Ash plumes were subsequently seen in satellite imagery extending SW at an altitude of about 6 km (19,700 ft) a.s.l. The Concern Color Code was raised to Orange.
On 27 November the Aoba volcano (also locally called Mt. Manaro) erupted on Ambae Island in Vanuatu. There have been no casualties reported, but volcanic ash has blanketed houses and food crops.
Activity at Soufrière Hills remained elevated during 25 November-2 December 2005. The seismic network recorded 158 rockfall signals, one volcano-tectonic earthquake, 93 long-period earthquakes, two hybrid earthquakes, and 17 long-period rockfall signals during the reporting period. Measured sulfur dioxide fluxes varied between 600 metric tons per day (t/d) measured on 30 November and 830 t/d on 26 November, with a weekly average of 690 t/d.
The hazard status at Galeras was at Level III as of 5 December. Low levels of seismicity and deformation were continuing. Although poor weather conditions obscured the volcano most of the time, steam and gas emissions were photographed on 2 December coming from several locations on the active cone, including the main crater.
The new eruption of Piton de la Fournaise from a fissure inside Domolmieu crater. (Photo: Patrick Devidal, published on Réunion's leading newspaper "Le Journal de l'île de la Réunion" - www.clicanoo.com)
Piton de la Fournaise volcano, La Réunion Island, erupted again for the third time this year. Here the original report from the volcano observatory:
"Immediately after the last eruption in the Dolomieu crater, the permanent GPS network and extensometer network of the "Observatoire volcanologique du Piton de la Fournaise" continued to show strong surface deformations, indicating the preparation of a new eruptif event. Today, November 29, at 0559 in the morning a seismic crisis started and at 0625 eruption tremor indicated the beginning of the third eruption this year. A first vent opened in the western Dolomieu for about 3 hours. A second vent opened on the north flank with a main emission point at 2370 m altitude. Very few lava projections were visible, however a rapid and large lava flow went down the flank in direction of Piton Kapor. Further observations were impossible due to clouds, fog and rain."
Karymski is getting more and more restless. Steam and ash eruptions with plume heights of up to 3,300m above the crater continue, while an increase in seismic activity is being recorded: according to news reports, a swarm of 130 tremors occurred under or near Karymsky volcano today and there are strong thermal anomalies as well. An escalation of the current eruption cannot be excluded to occur any time now.
Karthala volcano on Comoros Island erupted for the second time this year on Thursday 24th of November. Ther eruption was probably phreatic and caused by vaporization of ground water in contact with a shallow magma body underneath the crater. Substantial ash falls caused problems in the nearby capital Moroni, where authorities ordered water tankers into the streets to wash away the thick blankets of white ash from the eruption.
Galeras volcano started erupting on the morning of Thanksgiving Day (Thursday 24th of Nov. 2005) with a moderate (phreatic?) ash eruption that lasted 30 minutes and produced heavy ash falls on the city of Pasto, about 18 km (12 miles) away. There were no seismic precursors according to Colombia's Volcanology Institute.
Wed, 23 Nov 2005, 06:00
A thin plume emitted from Ulawun was visible extending N on satellite imagery on 23 November.
Read allWed, 23 Nov 2005, 06:00
OVPDLF reported that immediately after the end of the last eruption at the Dolomieu crater of Piton de la Fournaise that began on 5 October 2005, the permanent Global Positioning System (GPS) network and extensometer network at the volcano continued to show strong surface deformation, which was a precursor for a new eruptive event. On 29 November at 0559 a seismic crisis began at the volcano and at 0625 tremor indicated the beginning of an eruption. A vent opened in the western part of Dolomieu crater and another vent opened on the volcano's N flank.
Read allWed, 23 Nov 2005, 06:00
According to news reports, a phreatomagmatic eruption occurred at Karthala during the evening of 24 November. Ash fell in several towns, including in the capital city Morini along the Grand Comore island's SW coast and on the volcano's W flank. According to a UN OCHA report, local authorities estimated that about 2,000 people temporarily fled their villages in the region of Bamboa in the central part of Grand Comore Island, and sought refuge in less exposed areas, such as Mitsamiouli, Mboudé, and Oichili.
Read allWed, 23 Nov 2005, 06:00
On 24 November at 0246 seismicity was recorded at Galeras that was associated with the beginning of an eruption. Ash from the eruption fell in the towns of Fontibon, San Cayetano, Postobon, and in north Pasto (E of the volcano). INGEOMINAS raised the Alert Level from 2 (probable eruption in days to weeks) to 1 (eruption imminent or occurring).
Read allWed, 23 Nov 2005, 06:00
On 29 November AVO raised the Concern Color Code at Augustine from Green to Yellow after recording long-term important changes in seismicity and ground deformation consistent with renewed volcanic unrest. There were no indications that an eruption was imminent or certain.
Read allWed, 23 Nov 2005, 06:00
During 23-28 November, volcanic activity at Tungurahua remained at low levels with small emissions of steam and gas, with low ash content. Plumes rose to a maximum height of ~6.7 km (22,000 ft) a.s.l. on 23 November.
Read allWed, 23 Nov 2005, 06:00
AVO reported on 25 November that for several weeks seismicity beneath young volcanic vents on Tanaga Island decreased significantly from levels recorded in early October. Satellite images of the island showed no anomalous temperatures or evidence of ash emissions. AVO reported that based on the decrease in earthquake counts and frequency of tremor episodes, the likelihood of an eruption had diminished.
Read allWed, 23 Nov 2005, 06:00
Growth of the new lava dome inside the crater of Mount St. Helens continued during 23-28 November, accompanied by low rates of seismicity, low emissions of steam and volcanic gases, and minor production of ash. There were no significant changes in seismicity or deformation during the report period.
Read allWed, 23 Nov 2005, 06:00
Activity at Soufrière Hills increased during 18-25 November in comparison to the previous week. Growth of the volcano's lava dome was focused towards the E and S, with minor activity to the S and W. Continuous incandescence was observed at night on the SE and E sides of the lava dome.
Read allWed, 23 Nov 2005, 06:00
During 23-28 November, seismicity at Santa Ana was above background levels. Small earthquakes occurred that were interpreted as being associated with gas pulses. The amount of gas emitted was low.
Read allWed, 23 Nov 2005, 06:00
Rabaul caldera's active Tavurvur cone was quiet after ash emissions ceased on 20 November. During 21-27 November, only very small traces of gas were released from the eruption vent and from other spots on the summit area. Seismicity was at very low levels and a small amount of ground inflation was recorded.
Read allWed, 23 Nov 2005, 06:00
Vulcanian eruptions continued at Langila's Crater 2 during 21-27 November, with a slight increase in the level of activity compared to the previous week. The activity increase was marked by ash emissions that rose to heights between 1 and 2 km above the summit crater (or 7,650 and 10,900 ft a.s.l.). The ash clouds drifted W, SW, SE, and NW, depositing ash in those areas.
Read allWed, 23 Nov 2005, 06:00
During 21-27 November, two vents at the summit of Garbuna continued to release weak-to-moderate volumes of steam that rose a few hundred meters above the summit and drifted in various directions. No incandescence was seen at the volcano and no noises were heard. Seismicity was at very low levels.
Read allWed, 23 Nov 2005, 06:00
During 23-29 November, lava from Kilauea continued to enter the sea at the East Lae`apuki area and surface lava flows were visible on the Pulama pali fault scarp. Background volcanic tremor was near normal levels at Kilauea's summit. Volcanic tremor reached moderate levels at Pu`u `O`o.
Read allWed, 23 Nov 2005, 06:00
Several small explosions occurred at Colima during 23-28 November, producing plumes that reached a maximum height of ~8.5 km (28,000 ft) a.s.l. on 24 November.
Read allWed, 23 Nov 2005, 06:00
Activity at Cleveland further decreased during 18-25 November. Following a brief ash burst on 7 October, no further ash emissions were noted. AVO did not detect a temperature anomaly in the vicinity of the volcano after 6 November.
Read allFri, 18 Nov 2005, 22:28
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Steaming Galeras volcano, Colombia (AP Photo/Felipe Caicedo, El Tiempo)
Galeras volcano, 330 miles (ca. 500 km) southwest of Bogota, is emitting dense plumes of steam and producing characteristic volcanic tremors (so-called tornillos), making an impending eruption likely. 9000 people have been ordered to evacuate their homes, many of them refusing to leave.
Thu, 17 Nov 2005, 10:45
During 11-14 November, three lava flows were emitted from Fuego. On the 14th, two of the lava flows traveled from the S edge of the central crater 150 m toward the Ceniza ravine, and 400 m toward the Taniluyá ravine, and the third traveled 600 m W toward the Santa Teresa ravine. Avalanches of volcanic material spalled from the fronts of the lava flows.
Read allWed, 16 Nov 2005, 06:00
During 15-21 November, volcanic activity at Tungurahua remained at low levels with small emissions of steam and gas, with low ash content. Plumes rose to a maximum height of ~9.1 km (30,000 ft) a.s.l. on 15 November.
Read allWed, 16 Nov 2005, 06:00
There was an increase in seismicity at San Cristóbal beginning on 19 November. Increased tremor was interpreted as being related to gas and ash emissions. Ash fell W of the volcano and near the town of Chinandega, ~15 km SW of the volcano. The amount of tremor decreased later.
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