More than 2,000 aftershocks have occurred since the initial quake.
This aftershock is the strongest so far of over 200 that have occurred since the initial quake.
One person died in the initial quake when a boulder fell on a pickup truck.
A strong magnitude 5.3 aftershock struck the region approximately 16 minutes after the initial quake.
Several aftershocks have been recorded since the initial quake, the more significant of which are listed below.
If an aftershock is significantly closer to a populated area, it can cause much more damage than the initial quake.
Over eight hundred aftershocks of magnitude 4.5 M or greater have occurred since the initial quake.
An aftershock of 6.2 was recorded 20 minutes after the initial quake.
The initial quake wiped out about 5,000 buildings, but the great fire that followed destroyed most of the city.
Many precautionary measures were taken after the initial quake, including several evacuations.