WASHINGTON, Feb 25 (Reuters) - A magnitude 6.7 quake hit off the Indonesian island of Sumatra on Monday, the U.S. Geological Survey reported.

It said the quake, initially reported as a magnitude 6.9, struck at 1806 GMT 102 miles (164 km) southwest of Padang in Sumatra and was only 21.7 miles (35 km) deep.

The Pacific Tsunami Warning Center which monitors the world for tsunamis said there was no threat of a tsunami.

A powerful earthquake struck in the same area earlier, triggering panic and a brief tsunami warning, although there were no immediate reports of damage or casualties.

A huge earthquake measuring more than 9 struck off Sumatra on Dec. 26, 2004, causing a massive tsunami and more than 230,000 deaths in countries across the region.

(Editing by Vicki Allen)

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