The 1964 earthquake had a magnitude of at least 9.0.

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Multiple Choice

The 1964 earthquake had a magnitude of at least 9.0.

Explanation:
Magnitude measures the energy released by an earthquake, not just how strongly it is felt in a single place. The 1964 Great Alaska Earthquake released a vast amount of energy, and on the moment magnitude scale it is estimated at about 9.2 to 9.4. That places it well above 9.0, so the statement is true. This event was the largest recorded in North America and generated tsunamis across the Pacific, reflecting the enormous fault slip along the subduction zone. While shaking intensity varied by location, the sheer energy release confirms the magnitude being at least 9.0.

Magnitude measures the energy released by an earthquake, not just how strongly it is felt in a single place. The 1964 Great Alaska Earthquake released a vast amount of energy, and on the moment magnitude scale it is estimated at about 9.2 to 9.4. That places it well above 9.0, so the statement is true. This event was the largest recorded in North America and generated tsunamis across the Pacific, reflecting the enormous fault slip along the subduction zone. While shaking intensity varied by location, the sheer energy release confirms the magnitude being at least 9.0.

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