A strong earthquake struck off Taiwan's east coast today, the Central Weather Bureau said. No damage or injuries were immediately reported.The 6.1-magnitude quake was centered under the Pacific Ocean 130 kilometres east of Suao in northeastern Taiwan, the weather bureau said.Suao is a coastal city about 120 kilometres southeast of the capital of Taipei. The quake, which struck before dawn, was felt across the island but did not appear to cause major damage because of its distance, the bureau said.