New seismic stations in Surrey are detecting more, smaller earthquakes than were previously measured, as the "Surrey swam" continues. Tremors measuring 1.7 and 2.5 were felt near Newdigate at about 05:00 BST and 14:35 on Wednesday near Russ Hill and was described as a “weak thud”.
Dr Stephen Hicks from Southampton University said a 0.4 aftershock had been measured after the second quake. He said it may take months before seismologists can say what is causing the recent earthquakes although an oil company said the recent tremors are "categorically" nothing to do with exploration work being carried out about four miles away. Three tremors were felt on 1 April. The first had a magnitude of 2.7, a second within minutes came in at 1.8 and the third, an hour later, measured 1.7. This was followed by a fourth on 28 April measuring 1.5, followed by one on 27 June which measured 2.6 and a sixth on 29 June registering 2.4. The biggest quake occurred on 5 July and measured 3.0. A 2.5 quake on Wednesday was followed by an aftershock seconds later.
