
© USGSA map shows where the earthquake hit
The quake, at a depth of 33km (20 miles), was centred 161km (100 miles) east of Kira Kira in the Solomon Islands.
The Solomon Islands, a nation of hundreds of islands in the South Pacific, has many World War Two-era sites.
The earthquake, which struck at 3.26am (GMT), was reviewed to a magnitude 6.2 and a revised depth of 10.6km (6.5miles).
Affected areas include Kirakira, the provincial capital of the Makira-Ulawa Province in the Solomon Islands.
The earthquake's epicentre was 132 km (82.3 miles) west of the city, which has a population of 11,222.
It is located on the north coast of Makira, the largest island of the province.
The area is known for its stunning natural beauty and ample beaches.
Comment: The USGS also registered a strong and shallow (10.0 km depth) M6.3 earthquake hit Southern East Pacific Rise on November 15, 2018.