Uitbarsting vulkaan IJsland #14 Terug actiever!!

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Nieuwe enorme aswolk
De uitbarsting van de IJslandse vulkaan Eyjafjallajökull zit opnieuw in een explosieve fase en "aanzienlijke" concentraties as zijn op komst. Daar hebben IJslandse meteorologen en geofysici voor gewaarschuwd.

"Er is geen enkel teken dat er een einde komt aan de uitbarsting", klinkt het. Die uitbarsting duurt al sinds 14 april en veroorzaakt een aswolk die het luchtverkeer boven delen van Europa eerder al enkele dagen verhinderde.

"De uitbarsting is weer veranderd: de lava vloeit niet meer en de meeste magma wordt weggeslingerd door explosies in de krater", aldus het Icelandic Met Office and Institute of Earth Science. "Daardoor is er een aspluim en die veroorzaakt een aswolk die zware gevolgen kan hebben."

De nieuwe aswolk zou in eerste instantie gevolg hebben voor vluchten naar Amerika. De Irish Aviation Authority (IAA) spreekt van een "massive ash cloud" die bijna 1.500 kilometer lang is en 1.100 kilometer breed.

Die hangt boven de Atlantische Oceaan en drijft naar het Zuidwesten.

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Op vrijdag 7 mei 2010 11:06 schreef Burner82 het volgende:
Die infrarood beelden zien eruit alsof ze van Mars komen

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Eruption in Eyjafjallajökull - Status Report: 18:00 GMT, 06 May 2010
Icelandic Meteorological Office and Institute of Earth Sciences, University of Iceland

Compiled by: Sigurlaug Hjaltadķttir, Björn Oddsson, Egill Axelsson, Matthew J. Roberts, Sigrún Hreinsdķttir, Halldķr Björnsson, Bergūķra S. Ūorbjarnardķttir.

Based on:
IMO seismic monitoring; IES-IMO GPS monitoring; IMO hydrological data; IMO weather radar measurements, MODIS satellite image; reports from sent through the IMO web site, information from the Icelandic Coast Guard flight yesterday.

Eruption plume:
Height (a.s.l.): The ash plume observed from commercial pilots between 0530h and 0800h: 30,000 ft/9km. ICG helicopter flight between 13h and 14h: sometimes under 20,000 ft (where there is a cloud bank) and oscillates up into the cloud bank (over 9 km). The height of the plume varies from 4-6 km according to the weather radar. Icelandair Cargo flight at
18:00 climbing towards east from Keflavík estimates height at 21- 22,000ft.
Heading: East-south-east over land, then to the south (assessed from AVHRR figure from NOAA at 0435h and 1154h).
Colour: A police officer from Hvolsvöllur, stationed at Rauđafell, observed the ash plume to be dark-gray. Observation from ICG: dark.
Tephra fallout: Considerable ashfall at Ūykkvabæjarklaustur in Álftaver (at a distance of 65-70 km), (everything has turned black). It has not been established whether the ash cloud south of Eyjafjallajökull is ashfall or ash that has already fallen and is being blown from the ground. Ashfall seems to start midway through Mũrdalssandur.
Lightning: No detections today over the eruption site.
Noises: No noise can be heard at Hvolsvöllur. No noise was heard at Seljavellir at noon. Noise heard at Heggstađanes (200 to the north).

Meltwater:
Discharge from Gígjökull decreases further and meltwater seems to be running from the eastern side of the glacier. This is different from tuesdays meltwater were water was running from the west side. Lava flow might be changing the direction of meltwater flow. Such changes should be taken seriously with regard to possible outbursts due to accumulation of meltwater. Discharge at the old Markarfljķts bridge is decreasing. It has now been verified that increase in electrical conducitvity in Jökulsá á Sķlheimasandi was caused by volcanic ash penetrating the glacier and the meltwater. This rules out the possibility of sulphur rich gas from magma entering the meltwater.

Conditions at eruption site:
The lava stream down Gígjökull has been stationary for the
last two days. Explosive activity has increased and the cinder cone
continues to build up in the northern most ice cauldron.

Seismic tremor:
Tremor levels continued to decrease yesterday and this morning. They are now similar to what they were in the first phase of the eruption, 14 to 17 April.

Earthquakes:
Earthquake activity is still being recorded. At least 10 earthquakes have been located since midnight. Most of the earthquakes are sourced beneath or south of the top crater in the eruptive conduit that has formed since 3 May. Most of the earthquakes are less than magnitude 2, the biggest M2.2. Three events have been recorded beneath the southeastern ice cap, depth uncertain.

GPS deformation:
Measurements from around Eyjafjallajökull show continued horizontal displacement. South of the eruption, stations THEY and SVBH have begun to drift southward, whereas FIM2, located east of the eruption, shows northward motion. No further northward motion has been observed at STE2, located to the north. Today's displacement pattern suggests deformation beneath the southeastern part of Eyjafjallajökull.

Other remarks:
Between 14 April and 5 May no signals (exept diurnal and long-period earth tides) are seen at strain-station Stķrķlfshvoll, ~35 km WNW of the eruption.

Overall assessment:
Explosive activity has increased and effusive part has decreased for the last two days. This results in a higher eruption column with increased tephra fallout. There are no signs that the eruption is about to end.

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Op vrijdag 7 mei 2010 11:25 schreef basst2005 het volgende:
[ afbeelding

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Op vrijdag 7 mei 2010 15:15 schreef Frutsel het volgende:
vliegen daar nu ook geen vliegtuigen dan?
of vliegen die te hoog en/of erom heen?

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Op vrijdag 7 mei 2010 15:36 schreef Bolkesteijn het volgende:

[..]

Beetje een vaag plaatje, delen van de aswolk vlakbij de vulkaan hebben dezelfde kleur als de lager gelegen omgeving van de vulkaan, dat zou betekenen dat ze dezelfde temperatuur hebben als dit een infrarood beeld is.

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Op vrijdag 7 mei 2010 15:58 schreef luckyb1rd het volgende:
Heeft de koelere maand mei misschien ook te maken met de vulkaanuitbarsting? Het is gewoon hier begin maart brrrrrrrr....

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Op vrijdag 7 mei 2010 16:00 schreef Prutzenberg het volgende:

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Nee, gewoon een Noordenwind. Wel vervelend.

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Op vrijdag 7 mei 2010 16:10 schreef Prutzenberg het volgende:
Kleine aardbeving in de Waddenzee boven groningen! (bron)
Zou de Zuidwalvulkaan wakker worden.

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Op vrijdag 7 mei 2010 16:02 schreef luckyb1rd het volgende:

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Dus de aswolk komt weer hier heen? Ah eindelijk weer retro mooie blauwe luchten zonder vliegtuigstrepen..

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Iceland's volcano sends more ash towards Europe

REYKJAVIK, Iceland — Iceland's Eyjafjoell volcano threatened European skies with a new ash cloud Friday raising the risk of more flight cancellations, officials said.

"Renewed and more intensive ash eruptions took place overnight and as a result, the area of potential higher ash contamination is forecast to extend from Iceland as far south as the western edge of the Iberian Peninsula during the day," Eurocontrol, the European intergovernmental air traffic control coordinator, said.

"Lava has stopped running from the crater and the eruption is now again an explosive eruption," Icelandic geologist Bjoern Oddson said.

"When there's more explosive activity, the ash does become finer and if the activity increases, it could possibly cause problems in Europe's airspace," he said, noting "the ash is spreading to the south-east" of Iceland.

Late Thursday, Icelandic meteorologists and geophysicists warned Eyjafjoell would emit a larger ash cloud after renewed activity, though Oddson said it had stabilised overnight.

"Right now, we're not seeing nearly as much ash fall as in the first few days of the eruption", which paralysed European flight traffic for a week from April 14, he said.

The ash, at sufficient concentrations, poses a hazard for plane engines.

According to the Brussels-based Eurocontrol, the areas where the volcanic ash concentration were likely to exceed engine tolerance levels were to the west of north-west Europe.

"Transatlantic flights are being re-routed south of the affected area which could cause delays to these flights."

The ash cloud was predicted to reach up to 35,000 feet (some 10,500 metres), far higher than in recent days and thus affecting more overflying planes.

The cloud caused Ireland to shut its airspace from 2300 GMT on Thursday to 1200 GMT Friday, the third closure in as many days.

The Faroe Islands, a Danish territory in the North Atlantic, also shut airspace from Thursday night until at least 0000 GMT Saturday.

The Portuguese air traffic agency NAV said ash was expected in the country's airspace north of Lisbon later Friday but would have a limited effect, causing only some rerouting.

Last month the Icelandic volcanic caused travel chaos, with airspaces closed over several European nations.

It was the biggest aerial shutdown in Europe since World War II, with more than 100,000 flights cancelled and eight million passengers affected. The airline industry said it lost some 2.5 billion euros.

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Op vrijdag 7 mei 2010 22:17 schreef basst2005 het volgende:
Webcam op http://eldgos.mila.is/eyjafjallajokull-fra-thorolfsfelli is aangepast, is volgens mij een andere camera/locatie?

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Op vrijdag 7 mei 2010 22:38 schreef mouzzer het volgende:

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...

Deze camera heeft nog wel een compleet overzicht vanaf dezelfde locatie: http://www.vodafone.is/eldgos