WASHINGTON - The western US state of Oregon was rattled early Wednesday by a pair of earthquakes, the US Geological Survey said.

The first temblor off Oregon's coast struck at 1238 GMT and measured 5.0 on the moment magnitude scale, followed 30 seconds later by a quake measuring 5.3.

There were no immediate reports of damage or injury from the quakes, which were centered about 200 kilometres (125 miles) west northwest of Port Orford, Oregon about 400 kilometres (250 miles) from Portland.

- AFP /ls