Friday's news about earthquakes in Alaska and Argentina made me think about a quake I felt in 1959. In 1959, a magnitude 7.3 earthquake hit Yellowstone while I was living in Idaho.
http://earthquake.usgs.gov/earthquakes/states/events/1959_08_18.php
http://samslair.blogspot.com/
http://www.ypf.org/site/News2?page=NewsArticle&id=5343
http://faculty.weber.edu/bdattilo/shknbk/notes/intrmtnblt.htm
In Yellowstone, there's the added fact that the North American plate is moving over a hot spot that will in some future millennium erupt as a super-volcano and cause extended winter-like conditions.
Note: Humans and cheetahs almost became extinct when Toba blew 74,000 years ago due to harsh conditions.
http://en.wikipedia.org/wiki/Yellowstone_Caldera
http://volcanoes.usgs.gov/yvo/figures/fig1.html
http://pidema.wikispaces.com/Super+Volcano
http://en.wikipedia.org/wiki/Toba_catastrophe_theory
http://en.wikipedia.org/wiki/Supervolcano#Known_super_eruptions
Earthquakes For Kids:
http://earthquake.usgs.gov/learn/kids/
