Jan 20 2011 - Christchurch gets a wake-up call

A magnitude 5.1 earthquake shook the Canterbury region at 6:03 am today.

The epicentre of the quake was 10 km south-west of Christchurch city at a depth of 10 km. It is the first aftershock of the Darfield (Canterbury) earthquake over magnitude 5 since 19 October.

The strongest ground shaking today was measured at Lincoln (LINC), and this earthquake has crept in at number 5 in the list of its top 5 shakes:
Lincoln (LINC)

Date

Magnitude

Peak Ground Acceleration

4 Sep 2010 4:35 am7.191.426 %g
4 Sep 2010 7:56 am5.221.83 %g
5 Sep 2010 1:04 pm5.015.473 %g
6 Sep 2010 11:24 pm5.215.116 %g
20 Jan 2011 6:03 am5.114.189 %g

 

The top 5 shakes as recorded at the Christchurch Botanic Gardens (CBGS) seismograph, close to the city centre, are:
Christchurch Botanic Gardens (CBGS)

Date

Magnitude

Peak Ground Acceleration

26 Dec 2010 10:30 am4.948.455 %g
4 Sep 2010 4:35 am7.118.124 %g
8 Sep 2010 7:49 am5.115.685 %g
19 Oct 2010 11:32 am5.07.229 %g
25 Sep 2010 7:58 pm4.14.132 %g

 

Today's shock was measured at 2.109 %g at the CBGS seismograph.

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