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Write TRUE if the the statement given about earthquake and seismic wave is correct and false if it is not.
1. Earthquake strength can be detected and recorded by a seismograph.
2. Seismic waves behave differently as they encounter materials on different states.
3. Earthquakes occur frequently in the area called pacific ring of fire.
4. Seismic waves exhibit the same speed and effect on rock masses where they pass through. ​