05.09.2014 10:52
Flokkar: Volcano
The new Holuhraun fissure (to the right). To the left: the fissure that opened up last Sunday. (Picture: Snorri B. Jonsson)
New eruptive fissure in the Holuhraun eruption is much closer to
the Dyngjujokull glacier than the previous ones, and creeping towards
the glacier, says volcanologist Armann Hoskuldsson, who surveyed the new
fissure this morning. Volcanic tremor indicates the fissure opened
around 4 AM.
"The new fissure is inching closer to the Dyngjujokull outlet
glacier; that is obvious," said dr. Hoskuldsson, a volcanologist at
University of Iceland´s Institute of Earth Sciences. He has been
monitoring the eruption in Holuhraun from the start.
Dr. Thorvaldur Thordarson, a collague of Armann Hoskuldsson, also surveyed the new fissure this morning. "We estimate the fissure to be about 700 metres long, and the southern end of it is not far away from the margin of Dyngjujokull glacier." New information indicated that the southern end of the new fissure is between 2 - 3 kilometres from the glacier. Aerial photographs taken this morning show an effusive eruption in two fissures, but Dr. Thordarson says this is more likely a single fissure.
According to geophysicists at the Icelandic Met Office. faint volcanic tremor was detected between 4 - 5.00 AM local time (GMT), which could possibly indicate the opening of the new fissure. "We were there early this morning," says Dr. Thordarson. "Lava was flowing out of the new fissure at a steady rate, but the intensity was fairly low; the lava fountains did not exeed about 10 metres in height. The volcanic activity was unchanged in the fissure that openend up last Sunday."
All traffic around the eruption site has now been restricted, due to potential subglacial eruption and its consequences. "We are monitoring the situation from safe ground at a mountain hut near the Askja volcano to the north," says Dr. Thordarson.
Scientists and representatives from the Civil Protection Agency have surveyed the new eruption and the Dyngjujokull glacier from the air this morning and are on the way back to Reykjavik. "We are all waiting for the results from this surveillance flight," says Dr. Thordarson.
source
Dr. Thorvaldur Thordarson, a collague of Armann Hoskuldsson, also surveyed the new fissure this morning. "We estimate the fissure to be about 700 metres long, and the southern end of it is not far away from the margin of Dyngjujokull glacier." New information indicated that the southern end of the new fissure is between 2 - 3 kilometres from the glacier. Aerial photographs taken this morning show an effusive eruption in two fissures, but Dr. Thordarson says this is more likely a single fissure.
According to geophysicists at the Icelandic Met Office. faint volcanic tremor was detected between 4 - 5.00 AM local time (GMT), which could possibly indicate the opening of the new fissure. "We were there early this morning," says Dr. Thordarson. "Lava was flowing out of the new fissure at a steady rate, but the intensity was fairly low; the lava fountains did not exeed about 10 metres in height. The volcanic activity was unchanged in the fissure that openend up last Sunday."
All traffic around the eruption site has now been restricted, due to potential subglacial eruption and its consequences. "We are monitoring the situation from safe ground at a mountain hut near the Askja volcano to the north," says Dr. Thordarson.
Scientists and representatives from the Civil Protection Agency have surveyed the new eruption and the Dyngjujokull glacier from the air this morning and are on the way back to Reykjavik. "We are all waiting for the results from this surveillance flight," says Dr. Thordarson.
source
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