This graph shows real-time Seismogram data from a sub-station in North Devon at the time the 4.1-magnitude earthquake struck the Bristol Channel.
More top news
Clarke Carlisle "thinks about and prays for" the lorry driver he jumped in front of last year when he attempted to take his own life
The number of veterans seeking help for post traumatic stress disorder (PTSD) has risen by more than a quarter over the last year.
Plaid Cymru will today launch its election manifesto in Bangor ahead of the general election.