The British Geological Survey has confirmed that an earthquake hit West Cornwall.
The group says the quake measured 2.2 on the Richter scale and happened around 5km south-west Falmouth.
Residents in the Helston and Porthleven areas reported feeling tremors just before 5pm today (Thursday 8 August).
There are no reports of significant damage.
Aly was one of many in Helston who felt tremors. She spoke to ITV News:
A number of other people living in Helston got in touch following the earthquake.
The British Geological Survey would like to hear from anyone who felt Thursday's earthquake in Cornwall:
Earlier this year a project to drill more than three miles underground, helping to generate power that will provide energy to 3,000 homes, started in nearby Redruth.
But a spokeswoman for the Geothermal Engineering company said this is not connected to the earthquake.