A strong 6.3 magnitude earthquake struck off the coast of Tonga and Samoa at around 1 o'clock this afternoon, just two days after the giant tremor which caused a devastating tsunami in the region.

No immediate tsunami warning was issued by the Pacific Tsunami Warning Center in Hawaii and Fiji's Mineral Resource Department's Senior Seismologist, Laisarusa Vuetibau says the quake will not trigger a tsunami.

The quake occurred at a shallow depth of 10 kilometers, about 242 km off Tonga's northwest island of Neiafu.

Meanwhile, the combined death toll from Wednesday's tsunami which hit Samoa, American Samoa and Tonga is at least 155.

In Samoa, 115 people are confirmed to have died, 31 perished in American Samoa and nine in Tonga.