How are earthquakes measured?
A small earthquake was recorded in the East Midlands on Wednesday night.
The epicentre of the magnitude 3.8 quake was near the town of Oakham, in Rutland, at 10:25pm.
People living there reported feeling buildings shake and vibrations which lasted for as long as 10 seconds.
It's the second in England in two days: an earthquake with a magnitude of 2.9 was recorded in Hampshire in the south of England, on Tuesday.
Seismologist Steve Hicks explains to Ayshah how earthquakes are measured.