you mean ice quake? the underground frozen solid ice with such expansion= cause earth quake like movement. common in this neck of woods... extreme cold conditions. http://toronto.ctvnews.ca/hearing-loud-bangs-in-southern-ontario-it- was-likely-an-ice-quake-1.1616236 On Feb 27, 2015, at 9:18 PM, Graham Naisbitt wrote: > Hi Techies > > San Diego was fun, good to see so many friends. > > I learned something new, but am not sure if it is accurate or for > real but - I gather there is a weather phenomenon referred to as > "snow quake” - anyone heard of this and if so, what is it exactly? > > Have a great weekend everyone, > > Graham N > > ______________________________________________________________________ > This email has been scanned by the Symantec Email Security.cloud > service. > For more information please contact helpdesk at x2960 or > [log in to unmask] > ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________