Two strong quakes of magnitude 7.0 struck northeast Myanmar, close to the Thai and Laotian borders, the US Geological Survey reported on Thursday.It said the quakes struck seconds apart at 8:25 p.m. on Thursday (1355 GMT) and were centered 69 miles (111 km) north of Chiang Rai in neighboring Thailand. The first one was very shallow, at a depth of 6.2 miles (10 km), while the second one was deeper at 142.5 miles (230 km).It is a sparsely populated, hilly area best known as the Golden Triangle, which is a traditional source of illicit opium.