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Liste archivée des actualités:dimanche, déc. 16, 2007
Suzanne De Berge emailed the following message regarding a notable increase in activity at Fuego volcano: ...plus
samedi, déc. 15, 2007
Arenal, one of the few volcanoes with near-constant activity, continues to be in mild strombolian-type activity. ...plus [lire toutes]
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. ...plus
mardi, déc. 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. ...plus [lire toutes]
mercredi, févr. 24, 2010
Le volcan Talang est de plus en plus actif, si l'on en juge d'après les observations visuelles et la sismicité. Des panaches de cendres et de vapeur à partir de multiples cratères se sont élevés à une altitude de 3.1-4.1 km (10,200-13,500 ft) durant 27-29 Novembre. Une forte odeur de gaz de dioxyde de soufre a également été rapportés. Les visiteurs et les touristes ont été avisés de ne pas aller dans un rayon de 3 km du sommet. ...plus
jeudi, déc. 06, 2007
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.
jeudi, janv. 01, 1970
 Explosion au cratère nouvelle du Anak Krakatau 
mercredi, 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 ...plus
dimanche, 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. ...plus [lire toutes]
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. ...plus
jeudi, janv. 01, 1970
L'activité sismique au volcan Chiveloutch reste très élevé. KVERT suppose que le volcan produit exposions avec des plumes de cendres s'élevant à des altitudes de 8,5 km (28 000 pieds) d'altitude mais aussi de petites coulées pyroclastiques.
Des observations visuelles et l'analyse de séquences vidéo a indiqué que les panaches de cendres et de gaz-et-vapeur ont atteint des altitudes de 6-8 km (19 700-26 200 pieds) d'altitude durant 4-8 novembre. Nuages obscurci vues du volcan d'autres jours. Basée sur des observations de l'imagerie satellite, cendres plumes SW drifted le 7 novembre et une anomalie thermique est présente dans le cratère chaque jour pendant la période considérée. Le Code de couleur du niveau de préoccupation reste à Orange. Basé sur les informations provenant de le KEMSD, le VAAC de Tokyo a signalé que le panaches de l'éruption a augmenté à des altitudes de 4,9 à 5,5 km (16 000-18 000 pieds) d'altitude sur les 11 et 13 novembre. ...plus [lire toutes]
jeudi, 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. ...plus
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.
dimanche, nov. 11, 2007
 In the center of the historic Methana volcano
jeudi, nov. 08, 2007
There are still ongoing Strombolian eruptions from Anak Krakatau reported.
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. ...plus
lundi, 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.
samedi, 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 October.
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.
jeudi, janv. 01, 1970
KVERT a signalé que l'activité sismique à Chiveloutch était au-dessus de fond
niveaux durant 19-26 octobre. Basé sur l'interprétation de données sismiques, cendres plumes roses à une altitude de 6,9 km (22 600 pieds) d'altitude et petits chaud avalanches s'est produite. L'observation des séquences vidéo indique que gaz-et-vapeur panaches en hausse à une altitude de 3,3 km (10 800 pieds) d'altitude. 21 et 25 octobre. Basée sur des observations de l'imagerie satellite, cendres plumes SE drifted le 19 octobre et une anomalie thermique était présent dans le cratère chaque jour pendant la période considérée. Le niveau de préoccupation Code de couleur est restée à Orange. ...plus [lire toutes]
samedi, nov. 03, 2007
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.
Based on observations of satellite imagery, the Washington VAAC ...plus [lire toutes]
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. ...plus
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