7.4- magnitude quake strikes off Tonga
Thu May 23, 2013 8:10PM
An earthquake measuring 7.4 on the Richter scale has struck off Tonga in the South Pacific, but there have been no immediate reports of casualties or damage and no tsunami warning has been issued.
The US Geological Survey (USGS) said the under-sea quake struck at 5:19 a.m. on Thursday (1719 GMT), some 287 kilometers (178 miles) southwest of Tonga's capital Nuku'alofa, at a depth of 171 kilometers (106 miles).