Christchurch is my birthplace.
I still have family and friends who live there. They are now in fear of their lives as a result of the 6.3 'aftershock' which struck at 12:51pm. My brother says "we are in big trouble".
This earthquake was smaller than the September 2010 one, but shallower (September was 30+ kms deep, this one 5kms), so the damage is quite severe. There are unconfirmed reports of deaths.
The Canterbury people are going to need a huge amount of assistance and your prayers.
Go to this site to see the latest.