Experts say an Icelandic volcano could continue to erupt for years.
Lava has been steadily seeping from the volcano on the Reykjanes Peninsula, about 30 kilometres south-west of the capital, since it first erupted last Friday.
The lava has been flowing at a rate of between 5 to 10 cubic metres per second, which is strong enough to ensure the lava does not solidify and close the fissure.
“If it drops below three cubic meters, it’s very likely that the eruption will stop,” said volcanology professor at the University of Iceland, Thorvaldur Thordarson.
Mr Thordarson compared the lava flow to that of the Pu’u ’O’o eruption in Hawaii, which continued to erupt for 35 years.
“It’s a perfect tourist eruption.”