An earthquake with a revised magnitude of 6.6 has struck 174km north-northwest of the city of Ternate in Indonesia's Molucca islands, but there is thought to be no tsunami risk.
The quake hit early on Monday local time at a depth of 60.5km and was followed by aftershocks of a magnitude of 5.0 to 5.1, the US Geological Survey said.
Search and rescue agency official Samud Sergi said the quakes had not been felt in Ternate.
An emergency disaster agency spokesperson in Tohomon, North Sulawesi said they felt nothing in the area and had heard of no damage or casualties.
An earlier report from the USGS gave the magnitude of the quake at 7 and the depth at 10km.
The Pacific Tsunami Warning Centre said in a statement that, based on available data, there was no current tsunami threat from the event.
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