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In this activity students will analyze seismograms from three seismic stations in Alaska. They will use the difference in arrivals times of the primary and secondary waves with a travel time curve to determine the distance from the epicenter to the seismic stations. Using the epicenter distance and a drawing compass student can triangulate the location of the November 30th, 2018 Alaskan earthquake.
For information about how to read a seismogram, I suggest having students read this website: http://www.geo.mtu.edu/UPSeis/reading.html
For information about how to triangulate an epicenter, I suggest having students watch this video: https://youtu.be/oBS7BKqHRhs
1. While the epicenter to be located in this activity is accurately plotted, S-P travel times and map distances are fabricated to accommodate using one scale with the maps projection. The focus of the activity is on reading seismograms and using the triangulation method to locate the epicenter of an earthquake.
2. This resource is currently free, but will change into a paid resource once more elements are added. I'm providing it now (as is) so that teachers can take advantage of the recent earthquake as a teachable moment. - Nick (December 6th, 2018)
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