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.
More top news
A Bangor University study has looked at the potential power which could be generated by tidal ranges worldwide.
An Australian life sciences company has announced a £3 million investment in Wales, making Cardiff its new base in the northern hemisphere.
Report says more than £9 million of public money was spent by the Welsh Government before it ended its involvement.