For more about this earthquake www.iris.edu/retm Teachable Moment from IRIS Magnitude 7.4 earthquake in Kermadec on October 21, 2011 was recorded by 3 seismic stations in the US: Hawaii (57° away), Texas (93° away) and New Hampshire (119° away). The animations shows a cutaway of the globe to watch seismic ray paths travel through the earth to the 3 stations. Ends with actual seismograms from the stations.
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John Lahr describes how to use the AS1 Seismograph. (Video 8 of 12)
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