Magnitude 4 earthquake strikes Christchurch
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Within 15 minutes more than 7600 people had reported feeling it.
Within 15 minutes more than 7600 people had reported feeling it.
There is a 45 percent chance of aftershocks of magnitude 5 to 5.9.
GeoNet has classified the shaking as "light".
The magnitude 7.1 struck at 4:34am on September 4, 2010.
It's been a decade since the magnitude-6.3 earthquake struck that killed 185 people.