Shocks and Aftershocks

The most recent 6.3. earthquake in Christchurch was and aftershock from the earlier and larger September 2010 'quake.

Graphic showing location of main shock, aftershocks above magnitude 3, and fault ruptures in Canterbury.
Graphic by Rob Langridge and William Ries, GNS Science

Click on graphic for larger image

Related articles

• Scientists at odds over whether quake was aftershock - TVNZ (news.google.com)
• The Science Behind the New Zealand Quake (livescience.com)