Effect of Offshore Tsunami Station Array Configuration on Accuracy of Near-Field Tsunami Forecast
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概要
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We examined how an array configuration of offshore tsunami stations affects accuracies of near-field tsunami forecasts provided by a tsunami forecast method based on an inversion of the offshore tsunami data. We simulated tsunami forecast of the 2011 Tohoku earthquake assuming several array configurations. As a result, an installation of bottom-pressure gauges to the outer sea of the trench contributes to improving the forecast accuracies, as well as deployment of the gauges at the seafloor between a source and a coastal point where forecasts will be provided. We also examined how rapidly accuracies of tsunami forecasts improve when a dense offshore observation network is installed, and found that the accurate forecasts can be obtained from the data of the dense network 10-15 min earlier than from those of the existing-array configuration.
- Japan Society of Civil Engineersの論文
Japan Society of Civil Engineers | 論文
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