Magnitude 6.0 - SOUTH ISLAND OF NEW ZEALAND: "The M6.0 June 13, 2011 South Island, New Zealand earthquake is a continuing part of the earthquake sequence that initiated with the M 7.0 September 3, 2010 Darfield, New Zealand event. The June 13, M 6.0 earthquake is a dominantly strike-slip faulting event near the eastern end of the inferred rupture of the 21 February 2011 M 6.1 earthquake. Both this M 6.0 quake and the previous M 6.1 event have an inferred fault plane striking approximately east-northeast. The entire earthquake sequence is broadly associated with regional plate boundary deformation as the Pacific and Australia plates interact in the central South Island, New Zealand.
This latest earthquake, similar to the February 21 event, is close to the main population centers of Christchurch, New Zealand."