Location: off the coast of Oregon Period: 7 Dec 2021 21:30:16 - 8 Dec 2021 22:22:08 (1 day 51 minutes) Volcanoes in 100km radius: East Blanco Depression(43km) Earthquakes: 17 6 swarms found nearby. 2003 PS20030116.1(17.4km) 16 Jan 5 hours 6 earthquakes 2007 PS20070728.1(52.8km) 27 Jul 22 hours 6 earthquakes 2008 PS20080717.1(18.5km) 17 Jul 4 hours 5 earthquakes 2015 PS20150602.1(62.1km) 1 Jun 19 hours 5 earthquakes 2021 PS20210429.2(85.5km) 29 Apr 33 minutes 5 earthquakes S20211208.1(11.6km) 7 Dec 2 days 1 hours 32 earthquakes