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major quakes in the u.s
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it was a 7.2
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it was a 6.8
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it was a 7.3
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it was a 6.8
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it was a 7.3
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it was a 6.5
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it was a 6.7
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it was a 6.4
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it was a 7.8
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it was a 7.1
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it was a 6.7