Sunday, Dec 16, 2007
Suzanne De Berge emailed the following message regarding a notable increase in activity at Fuego volcano: ...more
Saturday, Dec 15, 2007
Arenal, one of the few volcanoes with near-constant activity, continues to be in mild strombolian-type activity. ...more [read all]
The volcanic unrest at Turrialba seems to intensify, and signs of a possible new eruption in the near to medium future are getting stronger: According to OVSICORI-UNA a gas-and-steam plume from Turrialba rose to an altitude greater than 5.3 km (17,400 ft) a.s.l. on 5 December. Fieldwork confirmed an unusual output of gas from several fumaroles along the S outer wall. Areas burned by acute acidification have extended in the last month. Pastures turned yellowish near the upper areas, and native and exotic tree species were impacted as well as birch tree patches along most drainages. Within the W crater, temperatures of fumaroles reached 280 degrees Celsius and native sulfur was present. ...more
Tuesday, Dec 11, 2007
The Indonesian Volcanological Survey has increased the alert level of Lokon volcano on 9 December because of increased seismicity and strong gas and steam emission from the crater lake. ...more [read all]
Thursday, Dec 06, 2007
Talang is becoming more active as judged from visual observations and seismicity . Ash and steam plumes from multiple craters rose to altitudes of 3.1-4.1 km (10,200-13,500 ft) a.s.l. during 27-29 November. A strong smell of sulfur dioxide gas was also reported. Visitors and tourists were advised not to go within a 3-km radius of the summit. ...more
In the recent days, Popocatepetl has been more active than usual. On 1 December, a larger explosion occurred and produced ash plume that rose to an altitude of 7.4 km (24,300 ft) a.s.l. and drifted N and then NE. Ashfall was reported in areas downwind. Based satellite observations from the Washington VAAC, the ash plume rose to an altitude of 9.1 km (30,000 ft) a.s.l.
There's new activity at Anatahan volcano. USGS reports small explosions occurring during the last week of November, accompanied by an increase in seismic activity.
Wednesday, Dec 05, 2007
...more [read all]
Wednesday, Nov 21, 2007
The Strombolian activity of Anak Krakatau is still going on with explosions and incandescence. Lava flows are visible from the islands around Anak Krakatau. The Alert Level remained at ...more
Sunday, Nov 18, 2007
Ubinas volcano continues to produce sporadic explosions with ash plumes rising to altitudes of about 5-7 km (16,000-23,000 ft) a.s.l. ...more [read all]
Tungurahua volcano continues its explosive eruptions producing ash plumes rising to altitudes of 6-9 km (19,700-30,000 ft) a.s.l. Ash ashfall was reported from multiple areas downwind, mainly to the W and SW. Loud roars and "cannon-shot" like detonations are heard in several areas near the volcano. IG reported the passing of a lahar on the SW flank that lasted about 30 minutes on 10 November. ...more
Seismic activity at Shiveluch volcano remains at highly elevated levels. KVERT assumes that the volcano is producing exposions with ash plumes rising to altitudes of 8.5 km (28,000 ft) a.s.l. as well as small pyroclastic flows. ...more
Thursday, Nov 15, 2007
Based on information from the Tanzania MVO, the Toulouse VAAC reported that Ol Doinyo Lengai erupted on 7 November and remained active. According to Frederick Belton's website, an observer saw a "smoke" plume rise to an altitude of 3.2-3.5 km (10,500-11,500 ft) a.s.l. and drift WSW towards the Gol Mountains on 10 November.
Anak Krakatau continues its new strombolian activity from the new vent south of the summit crater. The eruptions are producing small ash plumes, ejections of incandescent spatter bombs as well as lava flows, as news reports and data from KRAKMON indicate. Seismicity was at elevated levels.
KVERT reported a viscous lava flow erupted from the summit crater of Bezymianny volcano on 9 November. During an overflight on the same day, 4-km-long pyroclastic flow deposits from 5 November were observed on the SE flank. Lava flow-front collapses from older lava flows on the SE flank were also evident. A strong thermal anomaly is present on satellite data....more
CVGHM lowered the Alert Status of Kelut on 8 November from 4 to 3 (on a scale of 1-4), due to a decrease in seismicity and deformation. Temperatures of the crater lake were measured at 75 deg C on 6 Nov, and 150-210 deg C on the surface of the new lava dome. According to a local news article, a volcanologist reported that the lava dome was 250 m in diameter and 120 m above the crater lake surface. On 11 November, a plume rose to an altitude of 3.7 km (12,000 ft) a.s.l. and ashfall was reported in several areas.
CVGHM recommended that evacuees could return to their homes, but should stay clear of the mountain within a 3-km radius was restricted.
Sunday, Nov 11, 2007
Thursday, Nov 08, 2007
There are still ongoing Strombolian eruptions from Anak Krakatau reported.
Kelud volcano / East Java / Indonesia, eruption update: lava is building up an island inside the crater lake
There is still high activity inside the crater of mount Kelud. In the crater lake a small island is growing (probably a kind of lava dome). There is also a high seismic activity and many tremors that show upcomming lava. Steam from the cooking lake is rising up to 1000 m. It is possible that a big explosion may happen or a rupture of the new island inside the crater lake. The volcano is under close observation by volcanologists. ...more
Monday, Nov 05, 2007
As the news report, the lake in the Kelud crater has reached temperatures of more than 90 C. The heating of the crater lake indicates that magma is rising in the fault system of Keluds vent. Probably there is a volcano dome beeing built up in the crater that plugs the vent and leads to high preasure inside the system. In connection with overheated steam there may be a huge explosion of the crater top in the next hours or days. The region around the volcano is in highest danger of mud flows and pyroclastic flows. About 100.000 people living around the volcano have been evacuated already two weeks ago, but still a few people remain on their own risk in their homes.
Saturday, Nov 03, 2007
Based on a Significant Meteorological Information (SIGMET) advisory,
pilot reports, and observations of satellite imagery, the Buenos Aires
VAAC reported that ash plumes from Ubinas rose to altitudes of 5.5-8.5
km (18,000-28,000 ft) a.s.l. and drifted NW and NE during 23-27
It was reported that ash-and-steam and ash plumes from Tungurahua rose to
altitudes of 5.5-6.5 km during 23-30 October.
During 25-26 October, incandescence was observed at the summit and noises resembling "cannon shots".
On 28 October, ash plumes rose to 13 km (43,000 ft) a.s.l.
During 28-29 October, noises resembling blocks rolling down the flanks.
The Tokyo VAAC reported that eruption plumes from Suwanose-jima rose to an altitude of 1.5 km during 26-28 October and drifted E and W.
Deformation-monitoring instruments indicated that during
24-30 October lava-dome growth at Mount St. Helens continued.
During 24-30 October the lava dome at Soufrière
Hills changed very little. Seismic activity was very low and low-level rockfall and pyroclastic flow activity continued.
During 25-26 October, vigorous lahar activity was noted, especially to the E, including the Tar River valley. Ashfall was visible over N Montserrat, possibly due to rockfall activity and steam venting.
On 30 October a small pyroclastic flow was observed in the Tar River valley. The Alert Level remained elevated at 4.
KVERT reported that seismic activity at Shiveluch was above background
levels during 19-26 October. Based on seismic interpretation, ash
plumes rose to an altitude of 6.9 km (22,600 ft) a.s.l. and small hot
avalanches occurred. Observations of video footage indicated that
gas-and-steam plumes rose to altitudes of 3.3 km (10,800 ft) a.s.l. on
21 and 25 October. Based on observations of satellite imagery, ash
plumes drifted SE on 19 October and a thermal anomaly was present in
the crater every day during the reporting period. The Level of Concern
Color Code remained at Orange.
The Washington VAAC reported that ash-and-gas plumes from Santa María's Santiaguito lava dome complex rose to an altitude of (17,000 ft) a.s.l. and drifted S on 26 October.
Based on information from JMA, the Tokyo VAAC reported that eruption
plumes from Sakura-jima rose to an altitude of 3.7 km (12,000 ft)
a.s.l. and drifted E on 29 October.
Ash plumes from Rabaul caldera's Tavurvur cone rose
to altitudes of 2.7-3.7 km (3,900-15,400 ft) a.s.l. at the time of 29-30
October. Ashfall was reported in Rabaul town. Occasional incandescence
at the summit was observed.
It was reported that during 24-30 October fissure segment D from
Kilauea's 21 July fissure eruption continued to feed an advancing lava
flow. Observations on 26 October confirmed that a tube-fed pahoehoe flow along the N margin of the main channel advanced 2.4 km from the channel end. A few
small earthquakes were located beneath Halema'uma'u crater, and along
the lower SW rift zone and S flank faults during the reporting period.
KVERT reported that ash plumes from Chikurachki were visible on
satellite imagery and drifted NW on 20 October. Clouds obscured views
of the summit on other days during 19-26 October. The Level of Concern
Color Code remained at Orange
CVGHM reported that white and gray plumes from Soputan on 25, 26, 30 and 31 October rose to altitudes of 1.8-3.3 km. A lava flow traveled between 500-600 m down the W flank on 25 October. The Alert Level remained at 3 and villagers and tourists are advised not to go within a 6 km radius of the summit.
The Indonesian Maount Kelud volcano seems to have erupted like a top official said on Saturday. Based on seismograpic data there have been several eruptions that could not be seen, because of dense clouds over the mountains top. ...more
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