The Nordic island nation of Iceland has been hit by as many as 40,000 earthquakes in a span of just 20 days. 

Some of the quakes were as strong as magnitudes of 5.7 in the Richter scale. 

Iceland is on high alert due to the increased seismic activity in the region that has raised a volcano threat. 

As Iceland continues to be jolted by thousands of earthquakes since February, scientists call an unprecedented seismic activity. 

“At the moment we’re feeling it constantly. It’s like you’re walking over a fragile suspension bridge,” Rannveig Gudmundsdottir, a resident in the town of Grindavik in Iceland, told Reuters. 

Iceland is the most active volcanic region in Europe, with an eruption every five years on average. 

The source of the past weeks’ earthquakes is a large body of molten rock, known as magma, moving roughly one kilometre (0.6 mile) beneath the peninsula, as it tries to push its way to the surface.