Location: 8 km SE of Christchurch, New Zealand Period: 21 Feb 2011 23:51:42 - 24 Feb 2011 16:27:35 (2 days 16 hours 35 minutes) Volcanoes in 100km radius: None Earthquakes: 48 3 swarms found nearby. 2010 PS20100904.1(54.5km) 3 Sep 12 hours 5 earthquakes 2011 PS20111223.1(16.5km) 23 Dec 1 hours 5 earthquakes S20111223.1(13.9km) 23 Dec 1 day 6 hours 25 earthquakes