A second earthquake registering 7.2 shook the Solomon Islands Monday morning, less than an hour following a 6.5 quake.
The second earthquake struck at 9:36:30 local time 105 km (65 miles) SSE of Gizo at a depth of 30.5 km (19.0 miles).
The Pacific Tsunami Warning Center said that although there was no risk of a major tsunami, both the earlier and newer quakes may cause local tsunamis that could be destructive along coasts within a few hundred kilometers of the epicenter.
There were no immediate reports of damage. The Australian Tsunami Warning Center has issued no warnings for the Australian coast.
50 people died in Gizo when an 8.1 quake struck on in April 2007.