A powerful earthquake hit Myanmar Thursday near its borders with China, Thailand and Laos, the U.S. Geological Survey said.
The quake hit in eastern Myanmar, about 55 miles (89 kilometers) north of Chiang Rai, Thailand, the survey reported.
It had a magnitude of 6.8, the survey said, revising the estimate down from an initial reading of 7.0.
It was a relatively shallow quake, which can be very destructive.
The Geological Survey initially said the quake had a depth of 142 miles (230 kilometers), but it later revised its estimate to say the quake was 6 miles (10 kilometers) deep, putting it fairly close to the surface.
A second quake hit about half an hour later, with a preliminary magnitude of 4.8, the USGS said.
There were no immediate reports of damage or injuries.
The center of the quake was 589 kilometers (365 miles) northeast of Yangon, and 772 kilometers (479 miles) north of Bangkok, Thailand. It was 104 miles (168 kilometers) south-southwest of Yunjinghong, Yunnan, China.
A destructive tsunami is not expected, the Pacific Tsunami Warning Center said. In advice to government agencies, the center said the quake "is located too far inland and too deep inside the earth to generate a tsunami in the Indian Ocean."