Good chance of Grímsfjall eruption following the glacier flood
October 31, 2010 by Jón Frímann
According to Icelandic news there is a good chance of a eruption in Grímsfjall. Following the glacier flood from Grímsvötn glacier lake. That is at least the opinion of Páll Einarsson, a geologist at University of Iceland. This is not going to be a big eruption in Grímsfjall in Páll opinion. But it is most likely going to be similar in size to the eruption in Grímsfjall in the year 2004. But no damage did happen from that eruption and it did not erupt international flight paths (just domestic ones). In the news Páll also says that the pressure inside Grímsfjall magma chamber appears to be slightly higher then in the year 2004. But otherwise the situation in Grímsfjall is almost identical to the one in the year 2004.
Flood Might Indicate an Eruption in Grímsvötn
A flood has started in Gígja in south-eastern Iceland, but the origin is in Grímsvötn, an active volcano in Vatnajökull. The Icelandic Meteorologist Office detected subterranean disturbances near Grímsvötn lakes on Vatnajökull glacier, south Iceland, on Sunday afternoon causing increased flow of water by 30 cm and electrolytes. However other rivers leading from the glacier, such as Skeidará river, are dry.
“I think we can safely state that Gígja has started flooding,” Gunnar Sigurdsson, hydrologist and engineer at the National Energy Authority told mbl.is. “It may take 4-5 days to reach maxmimum volume.”
Once the water level in Grímsvötn lakes has reached a certain height it tunnels its way down. Sigurdsson said he could not say how the flood would develop. Maybe all the flood would go into Gígja.
The volume of water in Gígja Sunday afternoon was about 130 cubic meters per second, and the electrolytic about double what is normal, which according to Sigurdsson is not very much, but might increase. In the next few days scientists will follow Grímsvötn closely, an eruption is not impossible. Grímsvötn usually erupts about every ten years. Grímsvötn are the most active Icelandic volcano.
New eruption could be looming in Iceland, experts warn
"The water levels have tripled in (the river) Gigja since last night," water measurement specialist Gunnar Sigurdsson of the Icelandic Meteorological Institute told AFP.
The water flooding into the Gigja, on the Vatnajoekull glacier in eastern Iceland, comes from an icy lake in the crater of the Grimsvoetn volcano.
Due to increased thermal temperatures, the lake and surrounding glacier area has melted, filling the crater to a point where it has spilled over and caused a so-called river-run, which in turn could easily set off an eruption.
"When a river-run occurs, the pressure, in this case, in Grimsvotn, decreases, and with less pressure, there is a chance of an eruption from the volcano," Thorunn Skaftadottir, a geophysicist also with the Icelandic Meteorological Institute told AFP.
"This is not guaranteed," she pointed out, since an eruption "can only happen if the volcano has collected enough magma."
In 2004, a similar flood from the Grimsvoetn lake was closely followed by an eruption from what is considered Iceland's most active volcano.
Sigurdsson said an eruption was unlikely to occur "until the water levels in Gigja have reached a maximum.
"I don't know when we can expect the levels to reach their highest point, but I suspect it will be in a few days," he said.
Over the past 48 hours, the Meteorological Institute has also registered strong seismic activity in the area, and three moderate earth quakes ranging from 2.7 to 4.0 on the Richter scale.
Icelandic authorities were however unable Monday to say whether an eruption at Grimsvotn would hit air traffic as hard as in April when the Eyjafjoell volcano erupted, dispersing a massive cloud of ash which affected more than 100,000 flights and eight million passengers.
"It is near impossible to say if Grimsvotn erupts whether it will have an affect on air traffic at all," said Keflavik Airport spokeswoman Hjordis Gudmundsdottir, pointing out it would depend if the volcano spewed lava or ash.
"If it is an ash eruption, then it would affect air traffic, but only if it is a strong eruption with ash clouds reaching significant heights," she said, adding "it will also depend on wind, so at this point it is hard to guess."
Skaftadottir meanwhile said that any eruption from Grimsvotn would be an ash eruption.
"However, the scale of the eruption will be much smaller than the Eyjafjoell eruption and I do not think it would have the same effect on air travel as Eyjafjoell did," she said.
February 10, 2011
April 2010 Eruption of skull was just a rehearsal.
Scientists in Iceland are warning that Vatnajökull volcano looks set to erupt.
Geologists detected the high risk of a new eruption after evaluating an increased swarm of earthquakes around the second largest volcano, the lava is rising.
Iceland hit by 400 earthquakes in 24 hour, Krisuvik volcano show activity
After four days of continues earthquake activity it appears that Krísuvík volcano has stepped up it’s activity by a order of magnitude. Since midnight there have been over 400 earthquakes in Krísuvík volcano. The activity is continuing when this is written and does not show any signs of slowing down at this moment. Geologist in Iceland are expecting more earthquakes in this area over the next hours and even earthquakes that are larger then ML3.0 in size.
Last edited by CJ on Sun Oct 21, 2012 5:33 am; edited 2 times in total
Iceland has shut its main airport - may close others
No flight woes yet fron Iceland volcano eruption
May 22, 2011 Scientists say a plume of ash, smoke and steam from a volcano in Iceland has risen 12 miles (20 kilometers) into the air,
but there is no sign yet that it will disrupt international airline traffic.
The Grimsvotn volcano began erupting Saturday for the first time since 2004.
Police closed a main road near the volcano Sunday as heavy ash fell in the sparsely populated area.
Air officials ordered a no-fly zone of 120 nautical miles (220 kilometers) in all directions around the volcano, which lies under the uninhabited Vatnajokull glacier.
Ash from Iceland volcano could reach Scotland by Tuesday
May 22, 2011 Ash from an erupting Icelandic volcano could reach northern Scotland by Tuesday and parts of Britain, France and Spain by Thursday or Friday
if the eruption continues at the same intensity, airlines were warned on Sunday.
The warning is based on the latest 5-day weather forecasts, but is being treated cautiously because of uncertainties over the way the volcano will behave and interact with the weather.
Iceland's airports were closed on Sunday due to fears that ash from the Grimsvotn volcano, which began erupting on Saturday, could threaten the safety of passenger aircraft.
With winds currently blowing the ash northwards, authorities said there was little risk of any further disruption to European or trans-atlantic airspace over the next 24 hours.
But as low-pressure weather systems move into Europe and Scandinavia, there are concerns that northwesterly winds capable of dispersing ash towards the rest of Europe will pick up.
Airlines were told to brace for the possible further spread of ash later in the week during a conference call with weather experts and officials responsible for European airspace.
Ash could reach northern Scotland by midday on Tuesday and other parts of Britain, western France and northern Spain by Thursday or Friday if nothing changes, weather officials said.
Last edited by CJ on Sun Oct 21, 2012 5:43 am; edited 2 times in total
Ash cloud from Icelandic volcano approaching UK
23 May 2011 Ash from an erupting Icelandic volcano is getting closer to the UK and is expected to reach northern Scotland by tomorrow as there is no sign of winds that might sweep it away.
The ash is spreading towards the UK in a giant crescent shape with the horns pointing south, which will approach the eastern edge of Ireland and enter northern Russia by the end of today.
Iceland Volcano Ash cloud hits UK
May 24, 2011
Low density ash cloud expected over London, Scotland, Ireland, England airports Tuesday, causing airlines to cancel flights.
Thousands face volcanic ash cloud flight cancellations.
Even Barack Obama shortens his visit to Ireland, due to volcanic ash. I expect 0bama to lie, but who is insane enough to believe his roots are in Ireland?
25 May 2011
Air traffic over northern Germany is returning to normal after being disrupted by volcanic ash from Iceland.
Planes are again taking off and landing in Hamburg and Bremen, after they were closed for several hours. Berlin airports are to re-open later.
About 700 flights have been cancelled in Germany on Wednesday, Europe's air traffic agency said.
The activity at Iceland's Grimsvotn volcano, which erupted at the weekend, appears to have stopped.
The German authorities closed Bremen and Hamburg airports in the early hours of Wednesday. Traffic at Berlin's airports was halted at about 1100 (0900 GMT).
The country's air traffic control agency said the ash level was "no longer critical" at Bremen and Hamburg, and flights had resumed there.
UK flights resume
Despite a pause in the eruption, ash still causing flight disruptions
May 26, 2011
Iceland's Grimsvotn Volcano has ceased erupting for now.
The ash plume has not been observed so far Wednesday. However, this does not mean the eruption has completely ended.
It could just be a momentary pause.
Despite this pause in the eruption, ash from earlier eruptions is still causing flight disruptions.
What is left of the ash cloud that drifted over U.K. airspace Tuesday is now affecting airspace over Scandinavia, the Netherlands and northern Germany.
It is not certain how many flights will be canceled.
If the eruption resumes later Wednesday or Thursday, then prevailing winds will carry the ash back into British airspace on Friday.
July 9, 2011
I have seen some articles that Iceland volcanoes are shaking, heating up.
HEKLA, GATEWAY to HELL
New concerns over Iceland ash cloud as country's most feared volcano is ready to erupt.
Europe could be poised to feel the dusty wrath of one of Iceland’s biggest volcanoes, according to experts.
Geophysicists believe ‘unusual’ magma movement deep beneath Hekla could signal the early stages of activity that could lead to a massive explosion.
The volcano, which was dubbed the ‘Gateway to Hell’ in the middle ages, is capable of producing four times the debris of the country’s last ash-producing eruption in May.
Last edited by CJ on Thu Jul 21, 2011 4:00 am; edited 1 time in total
Iceland's massive volcano Katla appears on the brink of a major eruption just days after officials confirmed they had detected the start of eruptions over the summer.
Measuring devices this morning have picked up a large earthquake swarm, usually a tell-tale sign of a potential volcanic eruption.
Earthquake Swarm Keeps Iceland’s Katla Rocking
October 5, 2011
We’ve been keeping an eye on Iceland’s Katla for quite a while now and over the past year,
the volcano has been showing signs that magma is moving under the ice-capped edifice.
There have been frequent seismic swarms around and within the caldera.
so far, there is no sign of harmonic tremor, the usual harbinger that magma is moving and an eruption might be soon.
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