Iceland has declared a state of emergency, with police officials urging residents to evacuate the coastal town of Grindavik following an intense wave of earthquakes in the southwest of the country linked to a possible volcanic eruption.

Axar.az reports that nearly 800 quakes were recorded between midnight and 2 p.m. on Friday, with the shallowest at a depth of 3-3.5 kilometres, according to the Icelandic Meteorological Office.

In statements Friday, Iceland’s Civil Protection Agency said a magma tunnel that is forming could reach Grindavík. But as of Friday evening, the Icelandic authority said it has been impossible to tell if and where the magma might break through to the surface.

“Earthquakes may become bigger than those that have already occurred, and this sequence of events could lead to an eruption. However, there are still no signs that the magma is nearing the surface. Its progress is being closely monitored,” the Civil Protection Agency said.