Friday, March 18, 2011

Earthquake Liquification Video...

One of the most under-appreciated effects of earthquakes is soil liquification.  In certain areas (including many in California), this phenomenon is actually the single largest risk factor to man-made structures.  This video shows one of the visible symptoms: surface water appearing out of nowhere.  What it doesn't show is damage-causing mode – the loss of stiffness in the soil, turning it essentially into a liquid, removing all support for structures built upon it.

The most interesting stuff starts about halfway through the video, so be patient:

1 comment:

  1. MythBusters did a thing on this type of phenomenon. They used sand with air jets underneath that caused that sort of "liquification" of the sand. Made a car sink into the sand. Was very cool.