Location: 3km WNW of Willowbrook, CA Period: 28 Oct 2001 16:27:45 - 30 Oct 2001 08:39:24 (1 day 16 hours 11 minutes) Volcanoes in 100km radius: None Earthquakes: 75 1 swarms found nearby. 2021 S20210405.1(9.4km) 5 Apr 1 day 22 hours 108 earthquakes