Hi everybody to keep you informed, a deadly 7.5 earthquake has struck north of Christchurch, near Hammer Springs. The earthquake was 16km deep and struck at 12.02am. The people on the other side of town got evacuated on to the hills. The emergence tsunami sirens were going off.
Earthquakes are usually caused when rock underground suddenly breaks along a fault. This sudden release of energy causes the seismic waves that make the ground shake.
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