I live in Folkestone so we had the 4.3 magnitude in April 2007, which lasted around 20 seconds, made the whole house shake and was accompanied by a low rumbling. It caused a fair amount of damage to chimney's in the town but that was about it damage wise luckily. Then there was a much smaller one in March 2009 of 2.8 which was shorter. Not sure on the noise as I was beside a busy main road at the time!