Magnitude 6.6 (mww), 35 km deep, 22 km WSW of Illapel, Chile — 31.73°S, 71.38°W. September 21, 2015 at 17:40 UTC. Tsunami: USGS flags this quake as having caused one, or the potential for one. Felt reports to USGS: 283. https://earthquake.usgs.gov/earthquakes/eventpage/us20003mi0 Data: US Geological Survey (public domain).