Residents have reported feeling their homes shaking after the Crawley area was hit by an earthquake overnight.
The quake happened at 1.19am on Saturday, according to a seismograph from the British Geological Survey.
Several people reported on social media that they had felt the tremor in the Crawley area.
This is latest in a series of earthquakes which struck the Surrey/Sussex border this this year.
Residents have spoken of an "explosion" that shook their homes,
The British Geological Survey (BGS) received dozens of reports from people disturbed by the quake, which hit the region at 1.19am on Saturday.
Preliminary information indicated a 2.5-magnitude quake, centred on Newdigate.
The BGS says it had struck at a depth of 2.3km (1.4 miles) and released this graph which shows a black line when the tremor hit.
The British Geological Survey is asking residents to fill in a questionnaire on its website to record what they experienced.
Several people commented on social media that they had felt the tremor in the Crawley area.
The quake hit after a sequence of seismic events in the Surrey/Sussex area in February, when four tremors were recorded in the space of a fortnight.
Concerns were raised that the quakes were the result of nearby oil and gas exploration.