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A(n) ______ is an instrument used to detect and measure earthquakes.

a. seismograph
c. gps
b. volcanometer
d. anemometer

User Nrofis
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im pretty sure its a seismograph i think thats it
User Shamy
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Seismograph. When the earth shakes, so does the detector in the seismograph. That wiggles a pen which causes a wavey line as the shocks pass through the detector.
GPS is global POSITIONING SYSTEM - maybe when there's a quake it might be picked up by a gps as a small change in the positions of things.
anemometers measure fluid flow, such as air wind speeds etc.
a volcanometer measures volcanoes ?????
User JSCard
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