13 March 2011
Seismic Monitoring ~ IRIS Worldwide Quakescope
Realtime IRIS Seismic Monitor... Plus learn something about P, S, and Surface wave propagation... Big quakes (like this 2004 Sumatra event) are so powerful their waves travel around the world multiple times as measured by seismic stations at different distances (in degrees) from the epicenter... Finally, look at the past century of Great Earthquakes... Difficult to see any pattern at all.