People in Iceland have been warned to be "on their toes" as fears grow of another major volcanic eruption in the country.
Vidir Reynisson, department manager at the Civil Protection Agency in Iceland, said the latest round of earthquakes had been the most intense felt in the region for many years.
Speaking to a local TV station, Mr Reynisson said:
The reason we are reacting in this way is that this one [round of quakes] is bigger and more powerful than we have seen in a long time in this area. The Vatnajökull glacier area has shown us in recent years that it is very active and scientists have told us were going into a very active period with regards to eruptions in this area so there is good reason to be on your toes and follow this very closely.
There has been seismic activity recorded for days at the Bardarbunga volcano, which is situated beneath the Vatnajökull glacier, including movement of magma just 10km below the surface.
Roads have been closed around the area.