To date today (24 November 2011) there have been just over 9,000. These still occur every day.
There have been thousands of aftershocks following the major earthquakes in Christchurch in 2010 and 2011. These aftershocks occur over a period of time as the Earth's crust adjusts to the initial seismic activity.
about 4000,more and more daily though
The Christchurch earthquakes started on September 4, 2010, with the last major event occurring on February 22, 2011. Aftershocks continued for several years, with the most significant one being the June 13, 2011 event. The overall seismic activity in Christchurch lasted for several years, impacting the region on various scales.
Between 4:35am on Saturday September 4, 2010 and 2:00pm on Sunday 18 September, 2010, there have been nearly 700 aftershocks, with more expected. Aftershocks may continue for weeks. update: A month afterwards and we have had over 2000 aftershocks in Canterbury now. Though the frequency is now decreasing they are still happening with some a few rarer ones still being 4.6 - 5 on Richter scale.
Aftershocks are the results of the Pressure Plates being unstable, and are still adjusting or moving. The earthquake from September 4, 2010 in Christchurch will be having aftershocks for about 1 and a half more years.
Christchurch has had over 9,000 earthquakes and aftershocks since the very first one on 4 September 2010. That one happened at 4:35am on a Saturday morning. The worst one was 22 Feb 2011 when 182 people died, most of them crushed under buildings that collapsed. That earthquake struck just after mid-day at 12:55pm. It was a Tuesday.
Yes In Christchurch, Canterbury.On the 4th SEptember 2010
The reason that there have been so many aftershocks after the 2010 Christchurch earthquake is because bigger earthquakes have not only stronger aftershocks, but more of them. Aftershocks happen because when an earthquake occurs, the earth's plates hardly ever settle into a stable position straight away. So, the newly moved rock has to be settle.
There have been over 9,000 earthquakes and aftershocks in Christchurch since the very first one on September 4th 2010. However the main 3 days these occured were: Saturday 4 September 2010 at 4:35 am. Magnitude 7.1. Tuesday 22 February 2011 at 12:55 pm. Magnitude 6.3. Monday 13 June 2011. 2 big earthquakes - 1:00pm magnitude 5.6 followed by a magnitude 6.3 at 2:20pm.
September 3 2010
Saturday the 4th of september 2010 at 4.35
More than 100 and they're still coming. mate theres more than 600 theres been about 2000 now. Ok Really theres been 4153, you can look on the Christchurch Quake Map provided on the link below UPDATE: As from today (6 June 2012) there have been almost 11,000 since 4th september 2010, of a magnitude 2 or greater. (Actually, just had about 5 minutes ago!)