Magnitude 7.0 (mww), 10 km deep, southern Mid-Atlantic Ridge — 35.36°S, 17.16°W. June 17, 2015 at 12:51 UTC. Tsunami: USGS flags this quake as having caused one, or the potential for one. https://earthquake.usgs.gov/earthquakes/eventpage/us20002qn7 Data: US Geological Survey (public domain).