Earthquakes

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What is the location of the surface of the Earth directly above the origin of an earthquake?

What is the name of sea waves triggered by an earthquake?

To find the epicenter of an earthquake, what is the minimum number of seismic stations needed?

Which type of wave compresses and expands the rock of the crust as it travels?

What instrument is used to record an earthquake?

Which type of wave will appear second on a seismogram?

Which scale is most often used by scientists to measure the size of an earthquake?

What is the name of the origin of an earthquake?