Uitbarsting vulkaan IJsland #13: dooie boel.

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Op maandag 3 mei 2010 00:39 schreef mouzzer het volgende:

[..]

Dan zou ik nu even kijken
http://eldgos.mila.is/eyjafjallajokull-fra-fimmvorduhalsi/

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Eruption in Eyjafjallajökull - Status Report: 21:00 GMT, 02 May 2010
Icelandic Meteorological Office and Institute of Earth Sciences, University of Iceland
Compiled by: MJR / MTG / FS / BO / SSJ / SH

Based on: IMO seismic monitoring; IES-IMO GPS monitoring; IMO hydrological data; web cameras of the eruption site from Vodafone, Mila, and Múlakot; IMO weather radar measurements; information from scientists at Gígjökull. [No scientific overflight today.]

Eruption plume:
Height (a.s.l.): Estimated from web-camera views and observers on the ground at an elevation of 4–5.4 km (13–18,000 ft). Clouds of ash at lower elevations observed drifting south-east of the eruption site. No verifiable detections from the weather radar at Keflavík Airport.
Heading: South-east from the eruption site. Plume track visible at least 200 km from the eruption site on MODIS (12:35 GMT) and EUMETSAT (17:15 GMT) satellite imagery.
Colour: Dark grey (ash) clouds observed over the eruptive site. White (steam) plumes rising from Gígjökull, north of the eruption site.
Tephra fallout: Moderate ash-fall reported in the village of Vík (12:00 GMT), located 40 km south-east of Eyjafjallajökull.
Lightning: No detections today over the eruption site (18:00 GMT).
Noises: Booming sounds heard during the night and throughout the day up to 40 km south-east of the eruption site.
Additional note: Plumes of white steam extend partway down Gígjökull. Lava appears to have advanced further down Gígjökull overnight. Aerial observations at 18:25 GMT confirmed a dense cloud of ash between 3–3.3 km a.s.l. (10,000–11,000 ft) at 60° N, 16° W (~470 km south-east of Iceland). London VAAC have been informed about this siting.

Meltwater:
Before 16:00 GMT, discharge levels at the old Markarfljóts bridge, ~18 km downstream from Gígjökull, were noticeably lower than yesterday's levels. Between 16:00–17:00 GMT, a meltwater pulse was detected at the bridge; the flood was comparable in size to earlier floods on 30 April. At 19:40 GMT, web-camera images of Gígjökull showed plumes of steam rising from the glacier edge. Additionally, steam is rising from the delta that occupies the lake basin, suggesting
the discharge of near-boiling meltwater.

Conditions at eruption site:
Explosive activity has increased somewhat over the last 2–3 days; mass flux in the plume is estimated at 10–20 tonnes/s. A scoria cone continues to form at the eruption site. Lava is propagating down Gígjökull and most of its energy is being used to melt ice. As lava advances down-glacier, the size of the ice canyon increases. Large plumes of steam are produced where lava is in contact with ice and meltwater.

Seismic tremor:
During the last 30 hours, tremor levels have intensified. This intensification could be due to lava-ice interactions within Gígjökull, or conditions at the eruption site.

Earthquakes:
No locatable seismicity detected beneath Eyjafjallajökull.

GPS deformation:
Horizontal displacement towards the centre of the volcano, in addition to vertical subsidence. In the last couple of days increased subsidence has been observed at stations closest to the eruptive crater. These observations are consistent with deflation of a magma reservoir beneath Eyjafjallajökull, although the deformation pattern has changed somewhat.

Magma flow:
See overall assessment.

Other remarks:
No measurable geophysical changes within the Katla volcano.

Overall assessment:
The eruption is mixed, with the lava-producing phase being larger than the explosive phase. During the last 2–3 days, the plume has been darker and wider than in the preceding week. Tephra fall-out in the vicinity of Eyjafjallajökull has increased. From the location of the steam plume over Gígjökull, lava has advanced over 3 km north of the eruption. Steam plumes over the glacier edge from 19:40 GMT suggest that lava may have advanced even further. A rough order-of-magnitude estimate of lava volume can be obtained from the dimensions of the ice canyon. This estimate gives a lava production rate of-the-order 20 m3 /s (i.e. 50 tonnes/s). The explosive phase may be 10–20 tonnes/s. The explosive phase has increased somewhat in intensity during the last few days. Presently, there are no measurable indications that the eruption is about to end.

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Op maandag 3 mei 2010 10:27 schreef Mountainwatcher het volgende:
Het zijn vijf bevingen! Oei! Zie hier close-up van de kaart: http://en.vedur.is/earthq(...)uakes/myrdalsjokull/

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Op maandag 3 mei 2010 11:23 schreef Mountainwatcher het volgende:
Is het dan een clusterbeving? Die gaan toch meestal vooraf aan een nieuwe uitbarsting?

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Op maandag 3 mei 2010 12:32 schreef Isdatzo het volgende:
Met een diepte van rond de 18km (4) en 2km (2) lijkt dat niet bepaald 't geval .

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Op maandag 3 mei 2010 12:46 schreef kahaarin het volgende:

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Weet jij wat er gebeurt als er een stuk gletsjer gaat rommelen? Ik ook niet.

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Op maandag 3 mei 2010 12:50 schreef Isdatzo het volgende:

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Ik wel .

Moet sowieso een héél groot stuk gletsjer zijn om boven de 1 op de richterschaal uit te komen. En dan niet op een diepte van 18km natuurlijk.

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Op maandag 3 mei 2010 14:01 schreef kahaarin het volgende:

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Lol, echt waar?! Dat ben ik ook wel met je eens hoor, zit je te stangen. Maar 5 bevinkjes allemaal 2 of lager is toch geen reden tot paniek. In het begin zagen we dat op een rustig moment. Al moet ik wel zeggen dat het er gisteren al aan zat te komen, er werd al gerept over veranderingen in de grafieken. Ik ben benieuwd hoe het er op beeld uit ziet.

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Op maandag 3 mei 2010 14:59 schreef Isdatzo het volgende:

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Neuh, geen reden tot paniek. Misschien wel een reden om nog maar eens een optie op een vliegticket te nemen misschien .

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Increased Explosive Activity in Iceland Volcano
The explosive activity in the volcano in Eyjafjallajökull glacier seems to be increasing as the volcanic cloud has been larger and darker in color in the past few days than what it was the week prior, according to a new report from the Icelandic Meteorological Office.



^{The eruption in Eyjafjallajökull. Photo by Páll Stefánsson.}

The same applies to the eruption activity. The report says this increase might be caused because of the interplay between ice and lava in the Gígjökull glacial tongue or changes to the volcanic channel. There is nothing that indicates that the eruption is ending, visir.is reports.

The water flow in the Markarfljót river, which originates in Gígjökull, increased temporarily yesterday and reached the same level as during the flooding of April 30.

Around 7:30 last night webcams showed a steam cloud at the edge of the glacial tongue, which indicates that the ice which has melted has heated up.

A dust storm raged in the area where the most ash had fallen below the Eyjafjöll mountain range yesterday afternoon, Morgunbladid reports.

A dense volcanic cloud filled with ash emerged from the clouds overhanging the mountains and blew across the farmstead of Raufarfell, while old ash was carried with the northwestern wind from the slopes of the mountains, blocking the view.

Close to midnight last night the lava flow from the volcano appeared to have reached the end of Gígjökull. Eyewitnesses told police in Hvolsvöllur that the lava is flowing by the edge of the glacial tongue. A red glow was seen at Gígjökull.

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Op maandag 3 mei 2010 17:00 schreef Isdatzo het volgende:
Yup, had ook begrepen dat de lava ondertussen het einde van de gletsjer bereikt had. Da's dus een mooie bonus als ik ga .

* Isdatzo weer eens met reiscompagnon gaat overleggen.

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Op maandag 3 mei 2010 17:05 schreef Ermanon het volgende:
Maar die lava stroomt nu dus langzaam dat dal in als het goed begrijp ? Vet, kun je hem straks helemaal volgen tot aan de zee

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Op maandag 3 mei 2010 18:58 schreef Kabbie_Kabbie het volgende:
Waarschijnlijk het luchtruim van Ierland weer dicht.

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@drivetimerte: Breaking News: IAA may be forced to restrict flights over Irish airspace because of volcanic ash #ashtag on air now @RTERadio1

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Vliegvelden Ierland morgen gesloten

Vanaf morgenvroeg is het vliegverkeer
van en naar Ierland niet mogelijk.De
Ierse luchtvaartautoriteiten hebben
besloten geen vluchten toe te laten
vanwege vulkaanas dat vanuit IJsland
over Ierland waait.Er staat morgen een
noordelijke wind.

Om 8.00 uur Nederlandse tijd wordt het
vliegverkeer stilgelegd.Vooralsnog
geldt het vliegverbod tot 14.00 uur
morgenmiddag,dan wordt de situatie
opnieuw bekeken.

Vluchten die op grote hoogte over
Ierland heengaan vallen niet onder het
vliegverbod.