Grassmere

Liquefaction Effects from the Cook Strait / Lake Grassmere Quakes

The recent magnitude 6.5 Cook Strait and  6.6 Lake Grassmere earthquakes were comparable in size to the ‘quakes that rattled Canterbury in 2010 and 2011.  This map of peak ground accelerations for the Lake Grassmere Earthquake shows recordings of up to about 0.75g.(or 0.75  the acceleration due to gravity). One of the notorious and extremely […]

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Lake Grassmere Quakes

Following the earthquakes in southern cook straight, the GeoNet rapid response team left immediately to place seismometers around the area, to allow more detailed monitoring and get better information with which to model the fault ruptures. This meant that when the Mag 6.6 occurred, the enhanced array of seismometers was already in place. Here is

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