Earthquakes, Keppler 440th & My Grandfather's Birthday = A

http://earthquake.usgs.gov/earthquakes/pager/events/us/b00017xc/index.html

http://www.geo.mtu.edu/UPSeis/waves.html

http://earthquake.usgs.gov/learn/faq/?categoryID=2&faqID=26

http://pubs.usgs.gov/gip/volc/types.html