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The Suruga Bay earthquake in 2009 attacked the Hamaoka nuclear power station and stopped the operation. The maximum acceleration 4.38m/s 2 at the foundation of the reactor building of No. 5 unit was four times larger than that of No. 1 unit. It was found that the vibration amplitude at 2.5Hz is mainly related to that maximum acceleration. The records in the underground support the fact that...
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