https://earthquake.usgs.gov/eqcenter/recenteqsww/Quakes/usmuah.php Magnitude 7.4 – Kermadec Islands Region] , United States Geological Survey The epicentre was approximately 290 kilometers SSW from Raoul and measured 7.4 on the moment magnitude scale, and as such is classified as a 'major' earthquake by the United States Geological Survey.