SYDNEY, March 11 -- An earthquake measuring 5.9 on the Richter scale jolted 123km N of Finschhafen, Papua New Guinea at 17:33:29 GMT on Monday, the U.S. Geological Survey said.

The epicenter, with a depth of 267.59 km, was initially determined to be at 5.4912 degrees south latitude and 147.9351 degrees east longitude.