Jersey Met Office has confirmed that the Channel Island earthquake was the "biggest for the past 90 to 100 years".
Spokesman Tony Pallot, who felt the quake, said: "We are based at Jersey Airport on the first floor of arrivals, and we suddenly heard this quite loud rumble, crashing-type sound."
Tim Phillips, general manager of the Club Hotel and Spa in St Helier, was in a meeting with up to 30 people when the earthquake struck.
He said: "The building shook for about 20 seconds. It wasn't violent, but it was enough to make everyone question what was happening."
More top news
Europe is at risk of an unprecedented explosion in obesity rates, researchers say.
Windy, wet weather whipping us up
A Ukip candidate who made "sexist, racist and violent" comments about a female journalist has apologised, saying he was "deeply ashamed".