Not unusual. I have experienced earthquakes in Bradley Stoke and Telford but nothing as severe as one while on holiday in Zakynthos. There are many more earthquakes in Britain than most would ever realise, but because we are not on a major fault, they rarely cause any damage.
Earthquake, smerfquake let him get used to it. Living in the Pacific Rim of Fire region should give him more concern than the somewhat safer shores of the Channel Islands. I bet there aren't tsunami warning down his next street and if he wants to get some real feedback ask him to contact santiagored who used to post on BBC not606 years ago. P.S. If you are out there Santiago let us know how you life is currently because I always enjoyed your banter.
Who knows... Bristol Sport or Sport Bristol whatever it's called, is probably registered in the Cayman's or Bahamas as a tax dodge