Location: 4 km NNW of Challis, Idaho Period: 8 Dec 2015 22:30:10 - 12 Dec 2015 13:47:30 (3 days 15 hours 17 minutes) Volcanoes in 100km radius: None Earthquakes: 52 1 swarms found nearby. 2014 S20140415.1(6.7km) 14 Apr 3 days 22 hours 43 earthquakes