The British Geological Survey has received more than 100 reports from people who felt the earthquake, most of whom were within a 100km radius.
The epicentre of the earthquake in the Irish Sea was 15km away from Abersoch.
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Breezy overnight. It will become fairly cloudy as the night progresses.
It should turn cloudier through the early hours with some patchy drizzle and some hill fog too.
It will be a breezy day with variable amounts of cloud and some bright or sunny spells.