Within the past 24 hours, the level of the Skaftá river at Sveinstindur mountain peak has risen. Additionally electrical conductivity readings from the same location have increased. These observations signify that a glacial outburst flood is in progress.
It is likely that the flood originated from the western Skaftá ice cauldron, which last drained in September 2012; however this is unconfirmed until visual observations are made. The discharge of Skaftá river at Sveinstindur montain peak is presently 370 m3/s.
- Flood conditions are expected in Skaftá river over the next two to three days. Some flooding of unpaved roads close to Skaftá is possible.
- Hydrogen sulphide is released from the floodwater as it drains from the Vatnajökull ice-cap. The gas is particularly potent at the ice margin, where concentrations will reach poisonous levels. Travellers must stay away from the edges of Skaftárjökull, Tungnaárjökull and Síðujökull while the flood occurs.
- Crevasses will develop rapidly around the ice cauldron, so travellers on Vatnajökull should stay away from the region, including the lower part of Skaftárjökull and Tungnárjökull, where floodwater could burst through the surface.
Where is Skafta river?
Skafta river runs from the Western part of Vatnajokull glacier and down to the south coast of Iceland. The ring road the runs along the South Coast could be closed down and travelers in the area are asked to be cautious.
Floods in Skaftá are sourced from two ice cauldrons, formed due to persistent geothermal activity beneath Vatnajökull. On average, the cauldrons drain every two years, producing floods of up to 1,500 cubic metres per second. When the interval between floods is short the flood tends to be smaller. The eastern cauldron is responsible for the largest floods.
Source: Icelandic Meteorological Office