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Section 19.3 Measuring and Locating Earthquakes
Main Idea
Locating an
Use with page 508.
Consider the locations of two seismic stations that have been
plotted on a map as shown below. Explain why it is impossible to
determine the location of an earthquake using only two seismic
stations. Then continue your explanation to describe why three
stations are needed to determine the location of an earthquake.
Seismic Belts
Describe seismic belts by completing the paragraph below.
Use with page 509.
Most of the world’s earthquakes occur in narrow
that separate large regions of little or no
earthquakes are associated with
. Most
percentage of earthquakes happen far from
and are distributed more or less at
Point out how you could use a simple puzzle to demonstrate where
most earthquakes occur in the world. Describe what would happen if you shook the
Section 19.3 Measuring and Locating Earthquakes