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The six freestanding flying buttresses of the apse swayed or moved during the quake, causing the flying buttress arches to stretch and move, resulting in cracking and separation of stones from one another where the lateral flyer meets the vertical buttress. The buttresses will have to be shored up before scaffolding can be built to further inspect the damage.

There has also been rotation and movement along almost every exterior pinnacle on the Cathedral—resulting in hundreds of spalled corners and stones (stones that have crumbled or flaked off), cracks, and fallen crockets and finials that will have to be re-carved and installed. The final tally is not yet known.