Lava finally flows from Icelandic scientific band
Posted by feww on April 25, 2010
Lava flows northwards from the Eyjafjallajökull crater, melting the glacial ice: Report
The local experts do not believe large-scale flooding could occur from the melt water, but then again …
Oh, and if you are wondering why everyone in Iceland is suddenly speaking about lava flow in the past tense, you’re not alone. The rascals didn’t tell anyone lava had started flowing 4 days ago!
Notice: The following updates were issued by various Icelandic organizations. Unlike the govt organizations in the US, nearly all of the information broadcast by government organizations and educational outlets in Iceland and most European countries may be subject to copyright. If your use of their data goes beyond the educational use/ fair use, be sure to contact the authors for copyright clarification/ permission.
Department of Civil Protection and Emergency Management -Media team
Specialists from the Institute of the Earth Sciences (http://www.earthice.hi.is/ ) and the Icelandic Meteorological Office (http://www.vedur.is) flew over the eruption site in Eyjafjallajökull late yesterday. The lava flow seems to be of similar volume as in recent days (20-40 tons per second). The quantity of the volcanic plume is slowly decreasing. The flow of lava is most likely to have started near noon on April 21 when water started flowing continuously from Gígjökull. Steam plumes rose from the northern edges of the caldera after noon on that day and could be seen from a helicopter. Deflation associated with the volcanic tremor was noticed at the same time. There are no signs of melting or flow of water to the south. There are also no indications that the eruption is coming to an end.
There are still disruptions in domestic and international flights, according to information from ISAVIA, and passengers are therefore strongly advised to seek further information from air carriers and at: http://www.textavarp.is/ .
Icelandic Met Office Report
Eruption in Eyjafjallajökull, Iceland
Indications of lava flow to the north – 25 April 11:30
Yesterday evening, geophysicists from the Institute of the Earth Sciences found indications of lava flow from the eruption site. The risk of sudden melt water flow is, however, minor. Following is their description:
“North of crater a roughly 300 m long and wide depression has been melted out in the last three days. Steam plumes rise from the depression, especially at the margins. This is explained by lava flowing northwards from the crater with the steam rising where lava meets ice … Flow of lava is considered to have begun around noon on Wednesday 21 April.”
Icelandic Meteorological Office and Institute of Earth Sciences, UoI
Eruption in Eyjafjallajökull – status report 25 April 2010 at 1800
Height( a.s.l): Unknown, not seen above cloud cover at 5.3 km.
Tephra fallout: Minor (light fallout detected at two farms 10 km NW of vents)
Conditions at eruption site: Overall activity similar as yesterday. Eruption seen from west in the morning – north crater still active. External water has not affected vent activity much since 18 April. Geologists field observations (2-10 km from vents) show that explosivity is magmatic and that the tephra produced since 18 April is much coarser than during first four days. Explosions heard at Fljótshlíð, 10-15 km NW of vents. Meltwater discharge suggest similar lava activity. Processing of data obtained yesterday shows that lava had advanced 400-500 m northwards from crater, forming an ice depression extending some 700 m from vents.
Overall assessment: Magma flow rate has remained at similar level over the last few days. Plume activity is gradually declining. Flow continues flowing towards north. No signs of melting or meltwater discharge towards south. No signs of termination of eruption.Eruption in Eyjafjallajökull – status report 24 April 2010 at 1700
Eruption plume: Height( a.s.l): 13000 feet (4 km)
Tephra fallout: Minor (plume dark but no reports of fallout in districts around volcano)
Meltwater: 100-120 m3/s, based on gauge at old Markarfljót bridge and a rough estimate of base flow.
GPS deformation: Indicates slow subsidence towards the center of the volcano.
Magma flow: Eruption plume: less or equal to 10 tonnes/s.
Lava flow: 10-30 tonnes/s
Total magma flow: 20-40 tonnes/s
For additional details see: Institute of the Earth Sciences
- Eyjafjallajökull Eruption – UPDATE 24 April
- Eyjafjallajökull Eruption – UPDATE 23 April
- Eyjafjallajökull Eruption – UPDATE 22 April
- The Next Icelandic Volcano Likely to Erupt
- Iceland’s Bárdarbunga May Be Erupting
- Eyjafjallajökull Eruption – UPDATE 21 April
- Eyjafjallajökull Eruption Links Page
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