High Quality Content by WIKIPEDIA articles! The June 2011 Christchurch earthquake was a shallow magnitude 6.3 ML earthquake that occurred on 13 June 2011 at 14:20 NZST (02:20 UTC). It was centred at a depth of 6.0 km (4 mi), about 13 km (8 mi) from Christchurch, which had previously been devastated by the February 2011 magnitude 6.3 ML earthquake. The June quake was preceded by a magnitude 5.6 ML tremor that struck the region at a slightly deeper 10 km (6.2 mi). It was separately reported by the USGS as a magnitude 6.0 Mw event, focused at about 9 km (5.6 mi) below the surface.