At
9:15pm on the 19th January 2013, Christchurch and Canterbury were
shaken by a 4.6 aftershock that was centred near Rolleston. It was the largest
shake the area has had in over six months. Canterbury Quake Live recorded the
magnitude as 4.62 at 12 kilometres deep and it released 128 tonnes of energy.
It measured V on the Mercalli Scale meaning that it was ‘Felt by almost
everyone, some people awakened. Small objects moved. Trees and poles may shake.’
The
Canterbury Quake Live website was swamped with hits within minutes with the
usual 100 or 200 online swelling to over 16,000. Facebook and Twitter were also
buzzing with news and comments included the following:
“I
saw the walls of our lounge moving from side to side.”
“Really
violent quake just now.”
“That
woke me up.”
“That
was strong.”
The
4.6 aftershock was followed by a 2.38 shake at 9:48pm and a 2.22 at 10:00pm.
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