quake/ss-110221-nz-quake-10.ss_full.jpg Christchurch cathedral.

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quake/ss nz-quake-10.ss_full.jpg Christchurch cathedral Magnitude SOUTH ISLAND OF NEW ZEALAND NZ PM comments:

Canterbury M7.2 earthquake Sept M6.3 aftershock Feb. 21, 2011 All aftershocks since Sept (red are deep; star is Feb 21, 2011 event)

Mainshock and Major Aftershock

Shaking intensity in the city was much greater for this earthquake than the magnitude 7.1 earthquake from last September, or any of the aftershocks. The highest shaking was recorded at Pages Road Pumping Station at 188 %g, with readings of 127 %g at Heathcote Valley Primary School and 107 %g at Hulverstone Road Pumping Station. This is due to the proximity of the epicentre to the city and the shallow depth. The earthquake has a reverse faulting mechanism. badly-damaged-by-magnitude-6-3-earthquake.html

PRPC Acceleration (>1 g)

PRPC Velocity ~ 80 cm/s max

CCCC Acceleration

CCCC Velocity

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