Multiple aftershocks, including a 6.4.
2016-11-13 11:32:06.7 6hr 02min ago 42.25 S 173.62 E 10 6.4 SOUTH ISLAND OF NEW ZEALAND

M 7.9 - SOUTH ISLAND OF NEW ZEALAND - 2016-11-13 11:02:58 UTC
CSEM / EMSC
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Magnitude Mw 7.9
Region SOUTH ISLAND OF NEW ZEALAND
Date time 2016-11-13 11:02:58.3 UTC
Location 42.70 S ; 172.99 E
Depth 10 km

Distances 216 km SW of Wellington, New Zealand / pop: 382,000 / local time: 00:02:58.3 2016-11-14
97 km N of Christchurch, New Zealand / pop: 364,000 / local time: 00:02:58.3 2016-11-14
56 km N of Amberley, New Zealand / pop: 1,200 / local time: 00:02:58.3 2016-11-14

Witness location : Christchurch (New Zealand) (97 km S from epicenter)
The quake lasted around a minute at least, but it felt a lot longer.

Witness location : Christchurch (New Zealand) (97 km S from epicenter)
One of the most violent rolling quakes I have ever felt, here.

Witness location : Christchurch (New Zealand) (97 km S from epicenter)
It was a night mare. I was in bad with my boyfreind (sic). and suddenly the church in the front of my house fall down. i run to the street. And i saw a building collapsing and cars damaged. People were running in the street.

New Zealand Struck by Powerful Earthquake
By MICHELLE INNIS | The New York Times
NOV. 13, 2016
http://nyti.ms/2fP35mC

[snip]

SYDNEY, Australia — A powerful earthquake measuring 7.9 hit the east coast of New Zealand’s South Island just before midnight there on Sunday, triggering multiple aftershocks and at least three tsunami waves, with seawater levels rising about six feet.

New Zealand’s civil defense and emergency management issued a warning for people living close to the coast to move inland, to higher ground.