Spec references J249: P8.3i. Why earthquakes happen.
Spec references J249: P8.3i, P5.1e. Different types of seismic wave - primary (P) and secondary (S) waves.
Spec references J249: P8.3i, P4.2e. How a seismometer works and use of dynamo effect.
Spec references J249: P5.1e J250: P4.1e. The differences between transverse and longitudinal waves demonstrated with...
Spec references J249: P8.3i. Reducing the damage caused to structures during earthquakes.
Spec references J249: P8.3i. Finding the location of an earthquake.
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