– USA / seismic maps : Probabilistic seismic-hazard maps were prepared for the conterminous United States portraying peak horizontal acceleration and horizontal spectral response acceleration for 0.2- and 1.0-second periods with probabilities of exceedance of 10 percent in 50 years and 2 percent in 50 years.

from:    http://earthquake-report.com/2011/07/13/template-earthquake-related-news-july-2011/