Answer:
Here are three reasons why the 2011 earthquake in Christchurch was more destructive than the 2010 earthquake, beyond just the timing:
The 2011 earthquake was closer to the city center of Christchurch, so more densely populated areas were impacted. The 2010 quake was farther away.
The 2011 quake was shallower, so its shaking and impacts were felt more severely at the earth's surface. The 2010 quake was deeper underground.
Liquefaction was much more extensive during the 2011 event due to the proximity to the Avon river. This caused significantly more damage to buildings and infrastructure.
In summary, the location, depth, and geologic conditions combined to make the ground shaking and seismic impacts of the 2011 earthquake significantly worse for Christchurch itself, beyond just happening at a time of day with more people out and about. The proximity to the city center and resulting liquefaction severely affected populated areas and buildings.
Step-by-step explanation:
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