Samstag, Mär 31, 2007
The lava dome at Soufrière Hills continues to grow, mainly on its NE side. Over the past week, pyroclastic flows mainly affected the sector from the ENE to the NW of the dome and traveled intermittently E down the Tar River Valley. Small flows (<500 m in length) occurred NW in Tyres Ghaut, and one flow was observed at the top of Farrell's Plain.
Mild strombolian activity continues at Klyuchevsky volcano. Over the past weeks, explosions were observed throwing lava bombs about 50-100 m above the crater....mehr
Another explosive event occurred at Sheveluch Volcano on March 29 at approximately 17h53 UTC. The Tokyo Volcanic Ash Advisory Center reported a cloud from this event to 40,000 ft above sea level extending northeast from the volcano and moving at 50 knots. scientists with the Kamchatkan Branch of Geophysical Services estimated the cloud to be 33,000 ft above sea level, and a similar height was determined by AVO based on satellite data. The eruption was brief, lasting only 6 minutes.
Freitag, Mär 30, 2007
Explosions from Santa María's Santiaguito lava dome continue, producing ash-and-steam plumes to altitudes of 3.8-4.8 km (12,500-15,700 ft) a.s.l. Ashfall was reported from nearby areas. On 25 and 26 March, avalanches occurred from lava-flow fronts on the SW flanks of Caliente Dome. On 27 March, an explosion produced a pyroclastic flow that traveled down the SW flank....mehr
Tunguarahua volcano (Ecuador), activity update: strong, near-continuous explosions, ash fall, lahars
Tungurahua continues to be the most active volcano in South America. During the past week, near-constant explosive activity produced plumes that rose to altitudes of 7-10 km (23,000-32,800 ft) a.s.l. and drifted mainly W, NW, and N. Ashfall was reported from areas downwind and from areas SW within 8 km, on all days except 25 and 27 March.
New activity has started at Reventador volcano. In early March, the number of tectonic earthquakes from Reventador had increased. During 8-22 March, steam-and-ash plumes rising to altitudes of 4 km (13,000 ft) a.s.l. were observed sporadically.
Fuego volcano remains in a relatively active phase with strong stromblian activity. Ash plumes from explosions reach 4-5 km altitude and occasional ash fall occurs mainly in areas SSE and W of the cone....mehr
Basaed on visual observations, pilot reports and satellite data, Batu Tara volcano is producing near continuous ash eruptions with plumes rising to 1-2 km a.s.l.
The lava continues to flow on Stromboli. Three branches of lava flows originate at the 420 m vent on the Sciara del Fuoco, two of which still reach the sea.
Donnerstag, Mär 29, 2007
Etna is active again. Following a rapid increase of tremor starting at 07h24 this morning (29 March, 2007), SE crater began to emit lava fountains and ash plumes until around 9 am. A field investigation showed that this activity, very similar to the episodes in November / December 2006, was accompanied by the effusion of three lava flows: one from the 3180 m vent in the saddle between Bocca Nuova and SE crater, one from the vent on the lower SE flank of Bocca Nuova at 3050 m and one from the SE base of the SE crater cone. The first flows reached the rim of the Piano caldera (marked by the slope break on the upper flank of Etna), the one from the SE crater went towards the Valle del Bove, stopping short of the 2800 m hornito which had been the site of persistant lava effusion from Oct - Dec. 2006....mehr
The eruption plume from Sheveluch's explosion on 29 March 2007 phpotographed by the NASA satellite Aqua.
Sheveluch volcano had a large explosive eruption early on March 29 as became evident from satellite observations, that showed evidence of an ash plume that reached about 12 km altitude and was moving NE at 20 km per hour. The event appears to have been short-lived; web camera imagery of the volcano at this time shows no further ash production....mehr
Samstag, Mär 24, 2007
Batu Tara volcano (Lesser Sunda Islands, Indonesia), activity update: increasing explosive activity, evacuations
The new eruption of Batu Tara on the tiny island with the same name is getting more intense. As explosive activity has set on, ash clouds are ejected to up to 2-3 km above the small volcanic cone. As a safety measurement, mainly to protect them from tsunami (that might be triggered by earthquakes, landslides or pyroclastic flows) around 7,000 inhabitants of the closest neighboring island, Lembata 50 km to the south, were evacuated. Fishermen, also, have been warned to stay at least 2 miles (3.2 kilometers) from the volcanic island....mehr
Donnerstag, Mär 22, 2007
Weak explosive activity at Klyuchevsky began on February 15. Strombolian activity ejecting lava bombs up to 50-100 m above the crater were observed on February 16-18. According to the satellite data from Russia and USA, a thermal anomaly in the area of the terminal crater was observed....mehr
Over the past weeks and months, the lava dome and spine inside Mount St. Helens' crater continued to grow, accompanied by generally low levels of seismicity....mehr
Talang volcano on Sumatra is showing increased activity. Darwin VAAC reported that on 19 and 20 March ash plumes from Talang rose to 3.4-3.9 km (11,000-12,800 ft) a.s.l. CVGHM raised the Alert Level to 3 (on a scale of 1-4).
Activity at Fuego seems to be increasing.
Anatahan volcano, violently active in 2003-05, is showing increased fumarolic and seismic activity. Its Volcanic Alert Level was increased from Normal to Advisory....mehr
Mittwoch, Mär 21, 2007
Based on pilot reports, the Darwin VAAC reported an eruption plume from Merapi reaching an altitude of 6.1 km (20,000 ft) a.s.l.on 19 March.
Based on pilot reports, the Buenos Aires VAAC reported continuous emissions from Ubinas on 11 March. Ash plumes rose to 5.5-6.1 km (18,000-20,000 ft) a.s.l. and drifted N....mehr
Soufrière Hills volcano (Montserrat), activity update: lava dome growth, small pyroclastic flows, new spine
During 2-9 March, lava-dome growth at Soufrière Hills continued and was concentrated on an E-facing lobe topped with blocky, spine-like protrusions. Rockfalls affected the E and NE flanks. Pyroclastic flows traveled 2 km and were confined E in the Tar River Valley. Heightened pyroclastic activity on 7 March resulted in an ash plume that rose to an estimated 2.4 km (8,000 ft) a.s.l. and drifted W. On 11 March, a pyroclastic flow traveled down the NE flank into White's Ghaut. On 12 March, a large, blocky spine leaned steeply towards the NE....mehr
The Washington VAAC reported eruptions from Sangay during 12-13 March that produced ash plumes that rose to 7 km (23,000 ft) a.s.l. and drifted W. A hotspot was seen on satellite imagery.
INSIVUMEH reported that on 9 and 12 March, fumurolic activity from Pacaya's MacKenney Cone produced plumes that rose to 3 km (9,800 ft) a.s.l. and drifted S and SW. Incandescence was reflected in the plumes on 9 March. A lava flow from a crater on the NE flank was visible on 12 and 13 March to distances of 300 m....mehr
The Buenos Aires VAAC reported that on 11 March an ash cloud from Lascar rose to 5.5-6.7 km (18,000-22,000 ft) a.s.l. and drifted E....mehr
INSIVUMEH reported on 9 and 13 March that explosions from Fuego produced ash plumes that rose to altitudes of 4-4.2 km (13,000-13,800 ft) a.s.l. and drifted SE. Rumbling noises were heard from surrounding villages. Lava flows extended ~100-150 m W toward the Taniluyá River valley and avalanches occurred from the lava-flow fronts. On 12 March, incandescent material was ejected about 15-20 m above the central crater....mehr
In February, activity originating from Arenal's Crater C consisted of gas emissions, sporadic Strombolian eruptions, lava flows traveling N, and occasional avalanches from lava-flow fronts. Blocks from the lava-flow fronts traveled N, NE, and NW, periodically reaching vegetation where they started small fires. Volcanic activity was at relatively low levels, however, with few eruptions occurring and a small amount of pyroclastic material ejected.
Strong activity continues at Tungurahua. Loud cannon-shot like explosions were observed at Tungurahua volcano. IG reports ash plumes rising to 5-9 km (18,000-30,000 ft) altitude and drifting mainly to the NW and W, where ashfall occurred during 7-8 and 10-13 March. Incandescent bombs were seen ejected and rolling down the flanks during most of the explosions....mehr
On 20 March, lava emission from the 400 m vent on the Sciara del Fuoco increased, accompanied by increasing levels of tremor. Two well-alimented lava flow branches were present on the Sciara.
Today, 21 March, tremor has decreased and thermal camera observations show that at least one of the two branches were no longer alimentated and cooling. ...mehr
Sonntag, Mär 18, 2007
Sunday morning at 10:47 am local time, a section of Ruapehu volcano's crater walls collapsed under the pressure of the crater lake. The sudden draining of the lake caused a devastating lahar that travelled down from its altitude at 2500 m to sea level. Fortunately, the flash flood of mud drained through a river channel and no people were injured or killed. Authorities closed roads and the nation's main trunk rail track near the southern base of the mountain on New Zealand's North Island.
Freitag, Mär 16, 2007
Tom and Marco besuchten Stromboli Anfang März. Wir haben eine Auswahl von Fotos zum neuen Ausbruch 2007 mit den Lavaströmen ins Meer nun online gestellt.
On 15 March at 21.37 local time, a powerful explosion occurred from the summit craters of Stromboli, similar but much weaker than the event on 5 April 2003. Incandescent bombs were thrown onto the flanks of the volcano and created small bushfires. Ash fell on the inhabitated centers of the island, but nobody was killed or injured during the eruption.
Ash plumes from Batu Tara volcano (Lesser Sunda Islands) were visible at an altitude of 4,3km (14,000 ft) on 14 March....mehr
Donnerstag, Mär 15, 2007
The lava flow from the 400 m vent at the eastern sector of the Sciara del Fuoco is still active.
Samstag, Mär 10, 2007
Already this morning, the new effusive vent at about 500 m on the Sciara del Fuoco was almost inactive and little remained of the lava flow that started yesterday.
Freitag, Mär 09, 2007
8 March: Pause of the eruption
Dienstag, Mär 06, 2007
The lava flow is still very active at Stromboli volcano.
Donnerstag, Mär 01, 2007
Lava continues to flow from two vents high on the Sciara del Fuoco at Stromboli. The lava flows for 3 branches that have reached the sea where they generate thick white steam plumes. Access to the area is limited to a viewpoint at 273m a.s.l. A team of VolcanoDiscovery is on their way to report more details from the island.
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