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 […]
Liquefaction Effects from the Cook Strait / Lake Grassmere Quakes Read More »
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
Lake Grassmere Quakes Read More »
This is a screen shot of the Wellington seismometer from very early on Monday morning 22 July Following the earthquakes in Cook Strait over the weekend, it was impressive to arrive at work on Monday morning, and watch how the GeoNet team, many of whom had been busy right through the weekend, were in full
Earthquakes in Southern Cook Strait Read More »