At least four earthquakes with a magnitude of about 6.0 on the Richter scale shook the East China Sea early Friday.

The quakes occurred within two hours from one another, according to the Chinese earth quake monitoring network.

The epicenter of the quakes was 350 kilometers east of Taipei and 450 kilometers offshore from the nearest Chinese coast line.

A 6.3 magnitude quake at 8:26am was followed by 5.6 magnitude quake at 8:31am.

Another two quakes of 6.5 and 6.0 magnitudes followed the previous two at 9:46 and 10:23am.

There are no reports of injuries or damage from the quakes yet.