A minor earthquake was reported in South Wales Saturday, registering a 4.4 magnitude. According to the Independent, it is thought to be Britain’s largest earthquake in a decade.

From the Independent: Thousands of people reported the tremor, with its epicenter falling around eight miles northeast of Swansea city center, close to the village of Clydach, according to the British Geological Survey (BGS).

The quake was felt across South-west England, with residents in Bristol and Cornwall reporting the phenomenon, and as far away as Carisbrooke Castle on the Isle of Wight, more than 125 miles away.

The report continues: According to the BGS, more than 300 earthquakes are recorded on the UK mainland each year.

However, earthquakes of magnitude four or higher are a relatively rare occurrence, taking place on average once every two years.