June 2011 Christchurch earthquake

The June 2011 Christchurch earthquake was a shallow magnitude 6.3 M_L earthquake that occurred on 13 June 2011 at 14:20 NZST (02:20 UTC). It was centred at a depth of 6 km (3.8 mi), about 10 km (6 mi) from Christchurch, which had previously been devastated by another magnitude 6.3 M_L earthquake in February 2011. The June quake was preceded by a magnitude 5.9 M_L tremor that struck the region at a slightly deeper 8.9 km (5.5 mi). The United States Geological Survey reported a magnitude of 6.0 M_w at a depth of about 9 km (5.6 mi).

• http://en.wikipedia.org/wiki/June 2011 Christchurch earthquake