Magnitude 6.5 (mww), 34 km deep, 108 km WSW of Adak, Alaska — 51.42°N, 178.03°W. August 15, 2018 at 21:56 UTC. Tsunami: USGS flags this quake as having caused one, or the potential for one. Felt reports to USGS: 8. https://earthquake.usgs.gov/earthquakes/eventpage/us1000ga0z Data: US Geological Survey (public domain).