Location: 5 km SE of Ontario, CA Period: 7 Sep 2024 17:05:45 - 9 Sep 2024 01:59:04 (1 day 8 hours 53 minutes) Volcanoes in 100km radius: None Earthquakes: 40 3 swarms found nearby. 2019 S20190531.1(8.7km) 30 May 20 days 5 hours 1003 earthquakes S20190627.1(9.0km) 26 Jun 6 days 15 hours 93 earthquakes S20190829.1(6.1km) 28 Aug 4 days 15 hours 69 earthquakes