Karymski volcano continues to have powerful strombolian to vulcanian type eruptions, producing ash plumes to 7 km (23,000 ft) a.s.l.
After a week of intense vulcanian activity, Shiveluch's activity has decreased again on 28 December 2006, but new explosions can be expected any time.
Summary of activity during 16-26 December: Ash plumes from Shiveluch rose to 10 km (32,800 ft) a.s.l. and drifted E on 16-17 and 20 December. On 24 December, an eruption plume rose to an altitude of 9.1 km (30,000 ft) a.s.l. and drifted E. On 26 December, an ash plume was observed above 10 km (32,800 ft.) a.s.l., extending 150 km NE in satellite imagery. The level of Concern Color Code was raised from Orange to Red.
Over the past weeks, the lava dome continued to grow at Soufrière Hills, mainly on the SW part of the dome. Rockfalls and pyroclastic flows occurred on the S side of the dome and in the upper parts of both White's and Tuitt's Ghauts. On 23 and 24 December, ash plumes rising to 3 km were observed and MVO reported that the emissions originated from a vent on the W side of the dome. A small pyroclastic flow was visible NW in the upper reaches of Tyre's Ghaut and venting became more energetic. The alert level was raised to 4 (on a scale of 0-5). At night, incandescent rockfalls were visible from the NW and W.
Wed, 27 Dec 2006, 06:00Based on pilot reports, the Buenos Aires VAAC reported continuous emissions from Ubinas on 27 and 30 December. Ash plumes rose to 4.9-8.5 km (16,000-28,000 ft) a.s.l. and drifted E.
Wed, 27 Dec 2006, 06:00
During 22-29 December, the rate of lava-dome growth at Soufrière Hills increased and was focused on the W, where gas-and-ash venting occurred. A high whaleback lobe directed towards the SW was observed on 26 December. On 28 December, a small pyroclastic flow traveled W toward Gages valley.
Wed, 27 Dec 2006, 06:00KVERT reported that seismic activity from Shiveluch decreased on 27 December, but still remained above background levels. Based on video data, a steam-and-gas plume rose to 3.5 km (11,500 ft) a.s.l. on 27 December.
Wed, 27 Dec 2006, 06:00
Based on aerial observations, KVERT reported on 29 December that part of Bezymianny's lava dome was destroyed during explosive activity on 24 December. Moderate fumarolic activity was observed during 26-27 December and seismic activity was at background levels during 26-29 December. The level of Concern Color Code was lowered to Yellow.
Wed, 27 Dec 2006, 06:00During 27 December-2 January, seismicity at Tungurahua remained moderate to low and visual observations were limited due to inclement weather. On 27 and 28 December, lahars traveled down drainages including Bilbao to the W, Mandur to the NNW, and Mapayacu to the SW.
Wed, 27 Dec 2006, 06:00
INSIVUMEH reported that on 28 December a series of small sector collapses from the SW edge of Santa María's Caliente dome produced pyroclastic flows that traveled about 2 km down a ravine. On 29 December, another collapse produced pyroclastic flows and incandescent blocks. Thick ash plumes associated with the pyroclastic flows on both days reached an altitude of 4.3 km (14,000 ft) a.s.l. and drifted W and NW.
Read all
Wed, 27 Dec 2006, 06:00Based on information from Guayaquil Meteorological Watch Office (MWO) and satellite imagery, the Washington VAAC reported that an eruption from Sangay on 1 January produced an ash plume that rose to an altitude of 5.2 km (17,000 ft) a.s.l.
Read all
Wed, 27 Dec 2006, 06:00
RVO reported that during 24-29 December Rabaul caldera's Tavurvur cone emitted ash plumes that rose to 1.1-3.7 km (3,600-12,000 ft) a.s.l. and drifted in multiple directions. Ashfall was reported from areas downwind including Rabaul town on 25, 27, and 28 December.
Read all
Wed, 27 Dec 2006, 06:00During 27 December-2 January, lava from Kilauea continued to flow off of a lava delta into the ocean at the East Lae'apuki and East Ka'ili'ili entries. Between those two entries, lava streams were visible on 27 and 28 December descending to the ocean to re-establish the Kamokuna entry. Incandescence was intermittently visible on the pali and from the East Pond and January vents, South Wall complex, and Drainhole vent in Pu'u 'O'o's crater.
Read all
Wed, 27 Dec 2006, 06:00
Activity at Karymsky continued during 27 December-2 January, with 100-130 shallow earthquakes occurring daily. Ash plumes may have reached altitudes of 2 km (6,600 ft) a.s.l. A thermal anomaly in the crater was detected during 21-22 December. The Level of Concern Color Code remained at Orange.
Read all
Wed, 27 Dec 2006, 06:00Based on information from Japan Meteorological Agency (JMA), the Tokyo VAAC reported an eruption from Sakura-jima on 2 January. The resultant plume reached an altitude of 3.4 km (11,000 ft) a.s.l. and drifted SW.
Read all
Tue, 26 Dec 2006, 07:57
A paroxysmal (sub-Plinian) explosive eruption at Bezymianny began at 09:17 UTC on December 24 and ended in the afternoon the same day. A large eruption column rose up to ~ 10.0 km (32,800 ft) ASL and assumed the typical umbrella shape. An ash plume extended to the north-east from the volcano.
According to KVERT, seismicity of the volcano returned to background levels at 20:00 UTC on December 24. From satellite data, a large thermal anomaly at the lava dome is present.
Tue, 26 Dec 2006, 07:53
KVERT reports increased seismic activity at Sheveluch volcano, warning that ash explosions up to 10 km (32,800 ft.) ASL could occur at any time. Sheveluch's lava dome continues to grow.
Sun, 24 Dec 2006, 04:26
KVERT reports significantly increased seismic activity ata Bezymianny volcano. A series of ash explosions and pyroclastic flows were recorder starting from 23:52 UTC on December 23. Ash plumes rose up to 6.0 km (19,700 ft) ASL and extended to the north-east from the volcano.
Sun, 24 Dec 2006, 04:20
As the Goma Volcano Observatory reports, the eruption at Nyiamuragira that had started on 27 November is probably close to its end. Lava emission from the eruptive fissure has been decreasing to a very low level. Due to the difficulty to access the eruption site because of hostile militant groups in the area, exact observations other than by overflights are near impossible.
Sat, 23 Dec 2006, 04:18
According to the Volcanological Survey of Indonesia, seismic signals from rockfalls increased at Soputan during 11-13 December. On 14 December, ash clouds rose to an altitude of 2 km (6,600 ft) a.s.l. and ash fell within a 15 km radius of the peak. The emissions were accompanied by thunderous noises that were heard 8 km from the peak. On 15 December the Alert Level was raised from 2 to 3 (on a scale of 1-4) due to this increase in activity.
Wed, 20 Dec 2006, 21:56
The eruption at Piton de la Fournaise continues unabated. Lava continues to flow from the vents inside Dolomieu crater and since 3 weeks, it has been overflowing Dolomieu crater's rim and the flow fronts are advancing slowly but surely towards the coast. As of 19 December, the most advanced fronts of the lava are now well on the vegetated Grand Brûlé slope at about 800 m elevation, ca 3 km away from the National Road.
Read all
Wed, 20 Dec 2006, 21:34
As PHILVOLCS reports an ash explosion occurred at Bulusan Volcano at 1:09 am local time on 20 December 06. The explosion was not observed dur to thick clouds, but clearly recorded as seismic signals, rumbling sounds and lightning flashes that lasted for about 20 minutes.
Read all
Wed, 20 Dec 2006, 06:00The Darwin VAAC reported that ash plumes from Ulawun were visible on satellite imagery on 21, 22, and 25 December drifting ENE, NW, and SW, respectively.
Read all
Wed, 20 Dec 2006, 06:00
During 15-22 December, moderate lava-dome growth at Soufrière Hills continued and was focused on the SW part of the dome. Rockfalls and pyroclastic flows occurred on the S side of the dome and in the upper parts of both White's and Tuitt's Ghauts. Based on satellite imagery and pilot reports, the Washington VAAC reported that steam emissions with variable amounts of ash drifted W on 23 and 24 December.
Read all
Wed, 20 Dec 2006, 06:00According to observations, video data, and satellite imagery KVERT reported that ash plumes from Shiveluch rose to 10 km (32,800 ft) a.s.l. and drifted E on 16-17 and 20 December. Seismic activity was generally at background levels.
Read all
Wed, 20 Dec 2006, 06:00
The level of Concern Color Code for Bezymianny was raised from Yellow to Orange on 24 December due to an increase in incandescent avalanches, seismicity, and the intensity of a thermal anomaly at the summit. Within a few hours, a series of ash explosions and "ash avalanches" produced plumes that rose to altitudes of 6-10 km (19,700-32,800 ft) a.s.l. and drifted NE.
Read all
Wed, 20 Dec 2006, 06:00On 21 December, IG reported that lahars from Tungurahua traveled NW down the Mandur gorge resulting in a road closing and W down the Bilbao gorge. Gas-and-steam emissions produced small plumes on 22, 23, and 25 December.
Read all
Wed, 20 Dec 2006, 06:00
Based on information from JMA, the Tokyo VAAC reported that an eruption from Suwanose-jima occurred on 19 December.
Read all
Wed, 20 Dec 2006, 06:00Data from deformation-monitoring instruments showed that during 20-26 December the lava dome at Mount St. Helens continued to grow. Seismicity continued at low levels, punctuated by earthquakes of M 1.5-2.5 and occasionally larger sizes.
Read all
