It woke me up here in Wellington - didn't feel like the normal rolling side to side shakes we usually get, seemed to be more of a long vibrating shake. I went back to sleep and thought to check the web news in the morning.
After the spectacular rain, hail and thunderstorm Friday evening, it makes for an "interesting" weekend.
Seems there is quite a bit of damage in Christchurch itself, but few injuries.
Go to http://www.stuff.co.nz for more info.