http://www.johnstonsarchive.net/other/quake1.html http://www.johnstonsarchive.net/other/quake1.html http://www.johnstonsarchive.net/other/quake1.html Number of Earthquakes by Year (last updated 12 August 2011) http://www.johnstonsarchive.net/other/quake1.html http://www.johnstonsarchive.net/other/quake1.html http://www.johnstonsarchive.net/other/quake1.html http://www.johnstonsarchive.net/other/quake1.html http://www.johnstonsarchive.net/other/quake1.html My source this list