The epicenter of the quake was at a depth of 9km, some 23km from the provincial capital of Lata, the US Geological Survey said. The Pacific Tsunami Warning Center reported no tsunami warning was issued.
It comes just one day after the islands were shaken by an 8.0-magnitude quake producing numerous aftershocks of between 4 and 5 magnitude. Five people were confirmed dead in that disaster, two of them children.