According to the Twitter account of the Meteorology, Climatology, and Geophysics Agency (BMKG), @infoBMKG, the quake was located 10-kilometres below the Earth’s surface and about 97km northwest of Gorontalo, kompas.com reported.
This was the second earthquake in less than six hours in the area.
Earlier, the BMKG website said a 5.4-magnitude earthquake had occurred in Gorontalo at 5:41am local time yesterday. The first quake’s epicentre was also 10 kilometres below the Earth’s surface and about 85km from Gorontalo.