Uitbarsting vulkaan IJsland #13: dooie boel.

quote:

Op zaterdag 1 mei 2010 16:04 schreef Re het volgende:
ik moet over 2 weken weer 3x vliegen...

_{verkapte tvp dus}

quote:

Op zondag 2 mei 2010 09:35 schreef Burner82 het volgende:
Ziet er mooi uit

quote:

Op zondag 2 mei 2010 10:41 schreef Isiolo het volgende:

[..]

2e boem op de voorgrond ?

[ afbeelding ]

quote:

Eruption in Eyjafjallajökull - Status Report: 18:00 GMT, 1 May 2010
Icelandic Meteorological Office and Institute of Earth Sciences, University of Iceland
Compiled by: MJR / HB / FS / SSJ / BO

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; aerial observations from two scientific overflights: TF-SIF (10:30–11:00 GMT) and Eagle Air (16:40–17:15 GMT).

Eruption plume:
Height (a.s.l.): TF-SIF observations at 10:30 GMT confirmed an ash plume rising to 4–5.4 km (13–18,000 ft) near to Eyjafjallajökull. 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 detected up to 400 km from the eruption site on AHRR and MODIS satellite imagery (12:11 GMT and 13:30 GMT).
Colour: Dark grey (ash) clouds observed up to 4 km a..s.l. (~13,000 ft). White (steam) plumes rising from Gígjökull, north of the eruption site.
Tephra fallout: Dark, coarser-grained ash-fall reported at Ytri Sķlheimar (11:00 GMT), located 22 km south-east of Eyjafjallajökull.
Lightning: No detections today over the eruption site (18:00 GMT).
Noises: Booming sounds reported in the vicinity of Eyjafjallajökull.
Additional note: Plumes of white steam extend partway down Gígjökull. The uppermost plume represents the position of the northward-flowing lava flow, whereas the lower plumes are from hot meltwater.

Meltwater:
Discharge remains high from Gígjökull due to lava-ice interactions. Aerial observations of Gígjökull show that warm meltwater has carved a trench partway down the glacier. The electrical conductivity of Krossá and Steinholtsá remains high (see reports from 28–30 April for details).

Conditions at eruption site:
A 200-m-wide eruptive crater is visible within the ice cauldron. The rim of the crater appears to be ~30 m lower than the adjacent ice surface. Lava has propagated ~1 km north from the crater toward Gígjökull. Although steam is forming over the lava front, no large emissions of steam originate from the eruptive crater.

Seismic tremor:
Intensity comparable to the preceding eight days of eruptive activity.

Earthquakes:
No locatable seismicity detected beneath Eyjafjallajökull.

GPS deformation:
Horizontal displacement towards the centre of the volcano, in addition to vertical subsidence. These observations are consistent with deflation of a magma reservoir beneath Eyjafjallajökull.

Magma flow:
No measurements possible today.

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

Overall assessment:
Plume elevations and magma discharge levels remain similar to the preceding eight days of activity. Lava continues to flow north from the eruption site and down the Gígjökull glacier. Today's explosive activity and ash production represents a fraction of conditions during the height of the eruption (14–17 April). Presently, there are no measurable indications that the eruption is about to end.

quote:

Op zondag 2 mei 2010 12:06 schreef kahaarin het volgende:
Dagrapport van gisteren:


[..]

Het betreft dus geen 2e krater maar een goot die door de lava in de gletsjer is uitgesmolten, daarom is de 2e pluim zo wit, het is alleen maar stoom.
Er is nog wel een beetje asuitstoot bij de orginele krateruitgang en de uitbarsting is op een vergelijkbaar niveau als de afgelopen dagen.

quote:

Op zondag 2 mei 2010 21:48 schreef Mountainwatcher het volgende:
Als deze stijging in de grafieken ziet... ik kan het helaas niet interpreteren. Wat denken jullie?

http://hraun.vedur.is/ja/Katla2009/gosplott.html

Ik zag ze ook pas net

quote:

Op zondag 2 mei 2010 17:19 schreef mouzzer het volgende:

[..]

Was me paar dagen geleden al opgevallen dat er veel meer rook uit de buurt van de gletsjertong kwam, benieuwd of we straks ook lava gaan zien als de goot de rivier bereikt. Vanacht was het ook weer een mooi schouwspel.

quote:

Op zondag 2 mei 2010 22:41 schreef Mountainwatcher het volgende:
Nee, voor de Katla, maar voor de moeilijke naam ;-) Het ziet er nogal stijgend uit, sommige pieken zitten al hoger dan tijdens het begin van de eruptie

quote:

Op zondag 2 mei 2010 23:03 schreef kahaarin het volgende:

[..]

Hmm, misschien zo eens ff kijken.

Over de grafieken, bedenk dat een verandering van windrichting al voor trillingen kan zorgen, ik denk dat het smeltwater is en ijs dat zich aan het zetten is, het dagrapport rept ook over lawaai van brekend ijs dus denk ik dat het niet in de berg zit maar dat het ligt aan het ijs dat er bovenop ligt.

quote:

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

[..]

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

quote:

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 Markarfljķts 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.

quote:

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/

quote:

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?