The epicentre of the 4.4 magnitude quake was in Cwmllynfell.
People across south Wales have been expressing their shock after an earthquake hit with its epicentre north of Neath.
The tremor with a magnitude of 4-point-4 hit just after two-thirty on Saturday afternoon.
SEISMIC ALERT: CWMLLYNFELL, SOUTH WALES 17 FEBRARY 2018 14:31 UTC 4.4 ML— BGS (@BritGeoSurvey) February 17, 2018
LAT/LONG : 51.776° North / 3.837° West
GRID REF : 273.3 kmE / 210.2 kmN
DEPTH : 7.4 km
MAGNITUDE : 4.4 ML
Beth Dowding works at a cafe in Ynystawe.
She said: "It literally felt like the back of the shop was kind of being pushed to the front of the shop, that's all i can can describe it as.
"I've never experienced an earthquake before. All the customers stopped and we all kind of looked around and thought 'what was that?' 'has the fridge fallen down?'
"It was super, super weird.
"You could feel it right from beneath the shop. Everyone on the street poked their heads out, came out and that's when I started to realise it must have been an earthquake.
"I've never experienced anything like it before".
Richard Luckett, a seismologist with the British Geological Survey, says there may be more to come.
"Something this size we'd expect to cause cracks in plaster, cause things to fall off tables or fall over off shelves.
"An earthquake this size will have quite a few small aftershocks in the next weeks or even months and it's possible for them to get a magnitude of 3 which would be felt locally."
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