See video taken when a 5.7 quake centered near the city caused a cliff outside the city to collapse into the sea.
Thanks to Sonya Porter, Laurel and Rosco Mac for these links.
“Christchurch was massively damaged in a major quake in 2011,” says Rosco. “That one resulted in significant numbers of the population simply leaving the city permanently.
“Christchurch is located on a major fault line.”