A catastrophic earthquake is one with a magnitude over 9.0. It has strong effects over areas thousands of miles in diameter. Catastrophic earthquakes are recorded about once every

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Catastrophic earthquakes with a magnitude over 9.0 are extremely rare and are recorded approximately once every 20 years. These events release immense amounts of energy and can cause widespread destruction over large areas.

A Catastrophic Earthquake Is One with a Magnitude Over 9