Location: 3km N of Fontana, CA Period: 6 Jan 2005 12:11:13 - 8 Jan 2005 23:22:40 (2 days 11 hours 11 minutes) Volcanoes in 100km radius: None Earthquakes: 30 5 swarms found nearby. 2015 S20151230.1(8.6km) 29 Dec 5 days 15 hours 111 earthquakes 2019 S20190531.1(9.4km) 30 May 20 days 5 hours 1003 earthquakes S20190627.1(8.7km) 26 Jun 6 days 15 hours 93 earthquakes S20190829.1(13.5km) 28 Aug 4 days 15 hours 69 earthquakes 2025 S20250801.2(3.8km) 31 Jul 1 day 5 hours 30 earthquakes