We are the shaky isles, but at the opposite end of the world some places we don't think of as shaky are becoming more so.
A town in northern Finland was hit this year by 26 frost quakes in 7 hours. That's a world record. They've just confirmed the data on this.
So what are frost quakes? Jarkko Okkonen joins us from the Geological Society of Finland.
Photo: ROBERTO MOIOLA
