What causes an Earthquake?

EARLY MORNING QUAKE ROCK PARTS OF THE UK

A magnitude 4.7 earthquake shook Britain early Wednesday, centered on the east coast north of London, according to the U.S. Geological Survey.

The British Geological Survey put the preliminary magnitude for the earthquake at 5.3 on the Richter scale, according to the British Press Association.

There were no immediate reports of damage or injuries.

The quake's center was about 125 miles (205 km) north of London, or about 30 miles (50 km) south of Kingston upon Hull, the USGS said. It struck just before 0100 GMT.

To find out about earthquakes visit: http://www.geography-site.co.uk/pages/physical/earth/cause.html