WAIAU, NEW ZEALAND - NOVEMBER 14: A supermarket in Waiau, 120 kms north of Christchurch, shows damage in the aftermath of a 7.5 magnitude earthquake on November 14, 2016 in Waiau, New Zealand. The 7.5 magnitude earthquake struck 20km south-east of Hanmer Springs at 12.02am and triggered tsunami warnings for many coastal areas. (Photo by Matias Delacroix/Getty Images)
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Watch: New Zealand earthquakes caught on video
The first 7.8-magnitude killed at least two people and triggered a tsunami.
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Earthquakes 6 videos
WAIAU, NEW ZEALAND - NOVEMBER 14: A supermarket in Waiau, 120 kms north of Christchurch, shows damage in the aftermath of a 7.5 magnitude earthquake on November 14, 2016 in Waiau, New Zealand. The 7.5 magnitude earthquake struck 20km south-east of Hanmer Springs at 12.02am and triggered tsunami warnings for many coastal areas. (Photo by Matias Delacroix/Getty Images)
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Watch: New Zealand earthquakes caught on video
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These cows survived the powerful earthquake in New Zealand ORIG _00000612.jpg
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These cows survived the powerful earthquake in New Zealand
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earthquake early warning system orig mg_00002310.jpg
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Why aren't earthquake warnings better?
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A house was completely destroyed in the small town of Visso in central Italy, Thursday, Oct 27, 2016, after a 5.9 earthquake destroyed part of the town. A pair of strong aftershocks shook central Italy late Wednesday, crumbling churches and buildings, knocking out power and sending panicked residents into the rain-drenched streets just two months after a powerful earthquake killed nearly 300 people. (AP Photo/Alessandra Tarantino)
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Powerful earthquakes strike Italy
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Amatrice clock tower, August 25
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Life in the rubble of deadly earthquake
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A house destroyed by the 2011 earthquake.
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Remembering Japan's 2011 earthquake disaster
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