What is the main cause of an earthquake?
P wave✔ S wavesurface wave
✔ P waveS wavesurface wave
P waveS wave✔ surface wave
Fill in the blank to complete each statement about measuring an earthquake’s magnitude. The scale is best used to measure the strength of small, nearby earthquakes. The magnitude scale is useful for measuring the strength of earthquakes of all sizes and at all distances from a seismograph.
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