Location: 2km NNW of Palomar Observatory, CA Period: 30 Dec 2021 11:00:14 - 3 Jan 2022 12:15:13 (4 days 1 hour 14 minutes) Volcanoes in 100km radius: None Earthquakes: 63 4 swarms found nearby. 2019 S20190328.1(14.4km) 27 Mar 5 days 20 hours 79 earthquakes S20190905.1(3.3km) 4 Sep 4 days 3 hours 56 earthquakes 2021 S20211223.1(0.6km) 22 Dec 1 day 1 hours 46 earthquakes 2022 S20220109.1(0.8km) 8 Jan 18 hours 37 earthquakes