Did you feel an earthquake this afternoon in Swansea, Llanelli or another area of south-west Wales?
The British Geological Survey is asking people to share their experiences to help them build a better picture of the quake.
The map above, in its early stages, shows the intensity of the earthquake felt in different areas.
You can add your observations by visiting the British Geological Survey's website here.
More top news
Double murderer who stabbed his ex-girlfriend and her new partner to death in Cardiff has today been jailed for a minimum of 23 years.
The public inquiry into the M4 relief road around Newport has started. Critics say that a new road will destroy important wetlands.
Carwyn Jones travels to America to urge business leaders and politicians to maintain a special business relationship with Wales