9 December 2011

Away from AGU – images of rockfalls as they occurred during the June 2011 Christchurch earthquake

Posted by Dave Petley

As AGU 2011 draws to a close (and I still have some blog posts to write about the meeting), I need to try to catch up on a substantial backlog of landslide news.  So, to start off, Monica Gowan from the University of Canterbury in Christchurch has sent these two pictures of the rockfalls as they occurred in the Sumner area of New Zealand on 13th June.  Please note that she is the owner and copyright holder of the images, which I reproduce with her permission:

Copyright: Monica Gowan


Copyright Monica Gowan


If you look carefully at the images you will see several interesting things.  First note the dust being generated on the cliffs as well as the cliff toe.  Second, note that on the right side of the image there is also rockfall activity, as shown by the dust, out of the picture.  Thirdly, on the left side there is dust being generated, probably from structural damage to the church.

The aftermath of these cliff collapses can be seen in my earlier posts here and here.