I dunno about the epicentre, but i think it was here in Grimsby. I leave in a first floor flat and the house shock like crazy, my last earthquake was in Kavos, Greece last year and that was 5.7 on the richter scale, this 'felt' much the same, though nothing was falling off shelves or anything! So with my lack of knowledge i would say it was 5.0 easy. It must have last 20 seconds easily. Relived it was an earthquake actually cos 3miles away there is loads of chemical factories. Felt like an explosion, no word of a lie! W.O.W.