Magnitude 7.1 (mww), 133 km deep, South Sandwich Islands region — 58.54°S, 26.39°W. December 11, 2018 at 02:26 UTC. Tsunami: USGS flags this quake as having caused one, or the potential for one. https://earthquake.usgs.gov/earthquakes/eventpage/us2000isc8 Data: US Geological Survey (public domain).