Location: 26 km NE of San Ardo, California Period: 26 Sep 2004 15:54:05 - 18 Dec 2004 13:23:51 (82 days 21 hours 29 minutes) Volcanoes in 100km radius: None Earthquakes: 2543 1 swarms found nearby. 2004 S20040928.1(0.6km) 28 Sep 4 days 14 hours 136 earthquakes