A 5.7 magnitude aftershock caused several buildings to collapse on November 9, 2011.

The big 5.3 magnitude aftershock on Sunday afternoon, which sent people fleeing stores and movie theaters, rattled nerves as well.

This was later followed by a magnitude 6.0 aftershock.

On 8 September 2010, there was a large 5.1 magnitude aftershock with an epicentre just 7 km from the city centre.

On 22 July 2011 a magnitude 5.1 aftershock with a depth of 12 km occurred at 5:39am.

A magnitude 4.5 aftershock occurred in the same area at 7.11 pm on 20 July 2012 at a similar depth.

The initial earthquake was followed approximately five minutes later by a magnitude 5.7 aftershock.

A strong magnitude 5.3 aftershock struck the region approximately 16 minutes after the initial quake.

This was later followed by a magnitude 6.0 aftershock, at a depth of 21.7 km.

There have been dozens of small magnitude aftershocks, M 1-3, but these generally do not cause further structural damage.