Real-Time Prediction of Liquid Sloshing of Oil Storage Tank Based on Earthquake Early Warning

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  • 緊急地震速報に基づくリアルタイムスロッシング予測
  • キンキュウ ジシン ソクホウ ニ モトズク リアルタイムスロッシング ヨソク

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Abstract

For an efficient patrol to prevent and⁄or minimize secondary disaster such as fire breakout and diffusion of oil at tank sites just after an earthquake, we investigated the possibility of real-time prediction of liquid sloshing of oil storage tank based on Earthquake Early Warning (EEW) . We show that main damage such as fire, overflow of oil, failure of floating roofs and so on due to liquid sloshing in the 2003 Tokachi-oki earthquake was quantitatively explained by the velocity response spectrum at the site. In order to estimate velocity response spectrum in predicting liquid sloshing using EEW, we developed the attenuation equation of spectral amplitude for far-field surface waves considering both the seismotectonic zoning and the scaling law of the source characteristics. Then, we applied the attenuation equation to the EEW in the 2008 Iwate-Miyagi Nairiku earthquake (M7. 2) for Sendai Oil Industrial Complex District, and obtained a good agreement between the predicted and the observed spectrum. Thus, it is expected that the information about the predicted sloshing behavior in a very early stage after a large earthquake using EEW will be disseminated to person responsible for disaster countermeasures prior to communication congestion.

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