The U.S. Geological Survey in Colorado measured the quake at a magnitude 6.4. The agency said the offshore quake occurred about 6.2 miles below the surface and was centered 228 miles from the Maluku capital of Ambon.
There were no reports of damage and no tsunami warning was issued.
China's Xinhua news agency said the Indonesian Meteorological and Geophysics Agency measured the quake at magnitude 6.7.
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