The land at Askja has risen 70 cm over the past two years, indicating that some 20 million cubic metres of magma are collecting under the volcano’s surface. Measurements show that the temperature of the site’s geothermal lake Víti has risen this summer. There are no signs of an imminent eruption at the remote highland volcano, however, and if and when one occurs, experts say it is unlikely to affect inhabited areas or air traffic.
Askja’s last eruption occurred in 1961 and gave clear warning in the form of strong earthquakes and a significant rise in geothermal temperatures. No such signs have yet occurred at the site despite the uplift and higher lake temperature, Kristín Jónsdóttir, head of the Icelandic Met Office’s Volcanos, Earthquakes, and Deformation Department, told RÚV.
Uplift also occurring at Torfajökull
While eruptions at Askja can produce ash like the Eyjafjallajökull eruption of 2010 that disrupted air traffic, Kristín says an effusive eruption is the more probable outcome and would most likely not impact inhabited areas or air traffic. An uncertainty phase is in effect for the area and authorities have discouraged travellers from bathing in Víti geothermal lake or hiking around Askja lake.
The Icelandic Met Office reported yesterday that uplift is also occurring at Torfajökull, a small glacier also in the Highland region. The uplift indicates that magma is collecting below the surface but no increased earthquake activity has been measured at the site. The last eruption at Torfajökull occurred in 1477.
Meanwhile, the Reykjanes peninsula’s third eruption in three years has officially ended.