Gutenberg-Richter : Earthquakes appear to follow a pattern through time in terms of no. of earthquakes vs. magnitude. This is called the Gutenberg-Richter criterion. (CEDIM)
James Daniell (compiler), Glossary of Earthquake Terms (shortened list of the most important terms), Earthquake-Report.com, Guam, USA 2011. http://earthquake-report.com/2011/02/15/glossary-o f-earthquake-terms-2/, (ND/ Erthq - Brit) {898}