City council staff at the Art Gallery's civil defence headquarters said the 2.20pm aftershock was "very very significant" and a number of buildings had collapsed in the red zone.
Emergency teams confirmed the leaning Hotel Grand Chancellor had tipped further over.
The Art Centre's historic clock tower has lost its clockface. It has shattered and fallen to the ground.
And there's yet more photos. Like this one.
Enough of this.
EDIT: Key said to demonstrate the significance of today's quakes, the magnitude six quake this afternoon registered an eight on the Mercalli scale which measures the intensity of earth quakes. By comparison the February 22 earthquake was a nine.
Not surprised. That one today did feel as horrible as that one in February.
EDIT 2: "This size of events is likely to produce its own aftershock sequence, therefore rejuvenating aftershock activity at least in the short term."
OH GOOD. Again not surprised. But *sigh*