M4.3 earthquake in the Pyrenees caused by slow extension

Shaking was felt in Spain, France, and Andorra

A M4.3 earthquake hit the Pyrenees at 15:28 local time on April 17 2023. The earthquake was not large, but was felt across the region.

Map of the Pyrenees with recorded seismicity. Earthquakes are also projected to the right onto a timeline.

The Pyrenees represent an old collision zone - that is why there are mountains here! The mountains grew as the Iber…