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Slate's Explainer: Quakes and Earth's Rotation Slate senior editor Andy Bowers explains how Sunday's 9.0 earthquake beneath the Indian Ocean was powerful enough to affect the Earth's rotation.

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Slate's Explainer: Quakes and Earth's Rotation

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Slate's Explainer: Quakes and Earth's Rotation

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Slate senior editor Andy Bowers explains how Sunday's 9.0 earthquake beneath the Indian Ocean was powerful enough to affect the Earth's rotation.