One in 2010 that did a bunch of damage but only killed 2 people, but then triggered a significant aftershock in February 2011 that was much more destructive - partly because it was shallower and closer to the city, but also because lots of buildings had been damaged but not fully repaired.
https://en.wikipedia.org/wiki/Christchurch_earthquake_(disambiguation)
One in 2010 that did a bunch of damage but only killed 2 people, but then triggered a significant aftershock in February 2011 that was much more destructive - partly because it was shallower and closer to the city, but also because lots of buildings had been damaged but not fully repaired.