An earthquake shook west Cornwall with residents reporting a loud bang and shaking homes and windows.
The British Geological Survey (BGS) said the quake, measuring 2.2 magnitude, happened about three miles (5km) south-west of Falmouth.
Residents in Helston reported feeling tremors at 17:00 BST on Thursday. No structural damage was reported.
The BGS confirmed the "seismic event" and has urged affected people to tell them how they experienced it.
If you felt yesterday’s Cornwall earthquake please could you take the time out to fill in our felt questionnaire? It helps our seismologists gather important information. Thanks 🙏 https://t.co/xFEbCu88jw— British Geological Survey (@BritGeoSurvey) August 9, 2019
Stuart MacKenzie, from Leedstown, said he had been upstairs in his house when he heard a sound like "thunder or a large lorry going by".
"I also was aware of the bit of movement because I heard the room creak a bit," he said.
Radio Cornwall producer Rebecca Wills, from Helston, added: "There was a low rumble and there was like a sonic boom.
"The whole of the house shook and everyone kind of looked at each other and thought 'what on earth was that?'"
Despite that official earthquake confirmation, there was some gentle mocking of the Cornish quake on social media.
Boardmasters cancelled, storms a brewing and now an earthquake...end of days I tell ee. end of days 😂 https://t.co/5Oicyn1Om3— rob booth (@robbooth67) August 8, 2019
Heard a tiny 2.5 earthquake hit Helston in Cornwall this morning ... WTaF! Remember watching my Santa Monica apartment floor roll toward me like an ocean wave ... 😬😱😂 #keepkernowsafe pic.twitter.com/HyBbHNuXE6— Elan Durham (@europabridge1) August 9, 2019
Just had a small earthquake down in Cornwall. My beer is still standing so we are all good.— Laura 🖤 (@JustLaurahhh) August 8, 2019
Holidaymakers in Cornwall pointed out that nature had not exactly been on their side and the earthquake seemed to be the icing on the cake.
I can now see why boardmasters was cancelled (after saying ‘why have they cancelled it’s lovely’) Weather in Cornwall of biblical proportions. We have had a mini earthquake,torrential rain and now shocking winds! Tie down small children & dogs 🤣 expecting frogs or locusts 😳— Wendy Joberns (@Wendybird2012) August 8, 2019
Come to Cornwall on holiday and it’s rained since we arrived then there was a earth quake tonight 😂 #only us— Katie carey (@Lkrsl) August 8, 2019
There are about 15 seismic events of a similar size or greater every year in the UK and about 700 around the world, the BGS said.