Name:________________________
Date:____________Period:________
ANTICIPATION GUIDE – FINDING AN EPICENTER: THE TORTOISE AND THE
HARE, pp. 146-147
Before reading the article, check off all the statements with which you agree. After
reading, check off all the statements with which you agree and rewrite the false
statements to make them true.
Before Reading After Reading
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1. The point where the earthquake occurs deep
within the earth is called the epicenter.
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2. The point on the earth’s surface directly above
the place where the earthquake began is called
the focus.
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3. In order to find the epicenter of an earthquake,
seismologists first use the arrival times of P- and
S-waves as shown on several seismograms.
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4. Second, seismologists plot those times on a
special graph called a time-distance graph.
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5. The difference between the arrival time of a Pwave and an S-wave at a seismology station
decreases the further the seismograph station is
from the epicenter.
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6. With data from two seismograph stations,
seismologists can narrow the epicenter down to
the exact point.
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7. The S-wave is constantly faster than the P-wave.