A second magnitude-4 earthquake has hit Canterbury.
The most recent tremor, which struck about 6pm on Saturday, was a shallow earthquake centred just 5km underground near Darfield, 50km west of Christchurch, and was felt throughout the region, GNS Science reported.
An earlier quake rocked the area about 12.40am and was centred 10km northeast of Christchurch at a depth of 12km.
This earthquake was felt in Christchurch, which is still recovering from a devastating magnitude-6.3 earthquake in February 2011 in which 185 people died.
On Monday, the Canterbury Earthquakes Royal Commission will begin a public hearing on the collapse of the Canterbury Television building, where 115 people died.
Family members are expected to attend the hearing, which will last for eight weeks.
"The intention and purpose of the hearing will be to ascertain why the CTV building collapsed, causing such a significant loss of life," the commission says.
Family members have vowed to attend the start of the hearing at a church hall in Christchurch and are steeling themselves for an emotional and traumatic eight weeks, the New Zealand Herald reported.
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