10 months ago
The tremor, with a magnitude initially estimated at 7.4 before being scaled up to 7.8, had a depth of 23km, according to the US Geological Survey. New Zealand's Civil Defense puts the depth at 15km.
It was centered 46km from the town of Amberley with about 2,000 people, 70km from the town of Kaiapoi with 10,000 residents and 91km north-northeast of Christchurch.
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