COPENHAGEN (REUTERS) - Iceland expects a "relatively small" lava eruption in the island's south-west which could lead to a temporary halt in air traffic, the office of Prime Minister Katrin Jakobsdottir said late on Thursday (March 4).

A volcanic tremor was detected on Wednesday on the Reykjanes Peninsula, suggesting magma activity, the office said in a statement. The eruption would not endanger the population or critical infrastructure, but could temporarily halt flights at Keflavik International Airport 20km away, it said.

The authorities did not expect the kind of massive disruption to global air traffic caused by the Eyjafjallajokull volcano, located further east, in 2010.

"The type of eruption anticipated does not usually involve large explosions or significant production of ash dispersed into the stratosphere. Instead, a relatively slow flow of lava is likely to emerge from a fissure or fissures in the ground," Ms Katrin's office said.

The eruption in 2010 of the Eyjafjallajokull volcano halted approximately 900,000 flights and forced hundreds of Icelanders from their homes. At the onset of any eruption, the authorities will initially close Keflavik International Airport and declare a danger area with a radius of 220km around the eruption point.

After a forecasted area for ash, aviation will continue in accordance with procedures, it said.