The powerful 6.3-magnitude earthquake was registered near the Solomon Islands on 20 August, the US Geological Survey said.
There have been no immediate reports about casualties or damage caused by the quake. No tsunami warning has been issued.
The Solomon Islands are located in a seismically active zone known as the Ring of Fire and regularly suffer from powerful earthquakes.
The Ring of Fire quake zone is a strip of volcanoes and tectonic faults in the Pacific basin and has one of the highest levels of volcanic and seismic activity in the world.