The tremor`s epicenter was located at 2.36 degree northern latitude, 126.74 degree eastern longitude, 146 km northwest of West Halmahera, and at a depth of 10 km, the Meteorology, Climatology and Geophysics Agency (BMKG) said on its official website.
The earthquake did not have potential to trigger a subsequent tsunami, according to the agency.
Local inhabitants of West Halmahera, however, were urged to remain vigilant of possible aftershocks.
There were no immediate reports of any damage or casualties.
Reporting by Ricky Prayoga, fardah
Reporter: Antara
Editor: Fardah Assegaf
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