Earthquake

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Earthquake

By earthquake is meant a sudden natural rupture in the earth's crust which is of such a nature that elastic waves are emitted which makes motions in the ground. These are measured with a seismometer. The magnitude of the motions varies from imperceptible to very strong, and they decrease in intensity with distance from the center of the earthquake.

The motions that have occurred during the Natural Perils Pool's operating time has largely been within the stresses a building must withstand.