Name: ___________________________
Seismograph Stations
Follow the link above to the interactive site. Read the instructions on the left side of the
screen. Fill in the data table and answer the journal questions based on your
observations.
Station
Difference Arrival Times
(min and sec)
Distance from Epicenter (in
km)
Which state was the earthquake’s epicenter located in?
Why does the time difference between the arrival of the primary and secondary waves
grow longer at seismograph stations that are farther away from the epicenter?
How can the epicenter of an earthquake be accurately located?