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Exam (elaborations)
SES4U- Earth and Space science Epicenters Assignment | All Answwers are Correct
Help Wanted: Seismologist 
Introduction: 
How do seismologists determine the location of an earthquake from 
seismograms? By using triangulation you will be able to determine the epicentre 
of the earthquake. 
You will use four seismograms to determine the location of the earthquake’s 
epicentre, and you will determine the magnitude of the earthquake. 
Part A: Determining Epicentre: 
a. On the first seismogram, use the second scale on the bottom to determine the 
P-S lag time (difference in ti...