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- W4200037641 abstract "Abstract Three earthquakes occurred in the North Pacific in 2020, causing observable tsunamis. The tsunamis were not devastating. Numerical modelling of tsunami propagation was performed to reproduce operational forecasting (retrospective analysis) of waveforms at deep-water stations. Direct calculation of tsunami using USGS finite-fault source data on GPU was carried out. The leap-frog (Arakawa staggered grid) scheme calculation over the Pacific Ocean on a regular grid with a spatial step of 0.5 arc minutes of 1440 min (1 day) tsunami propagation was performed in approximately 90 min of computer time. With use of a hybrid cluster with several GPU accelerators and proper optimization of the simulation algorithm, this time can be reduced by tens of times. Consequently, the time for estimating the transfer function will be comparable to the travel time of a tsunami to the stations, where the forecasts data is. It will make possible to forecast the shape of a tsunami at any point with a lead time enough to decide for tsunami alert at sites where a tsunami poses a real danger. The calculation results are in good agreement with the real data of deep-ocean measurements. The quality of the forecast is comparable to the quality of calculations by other methods." @default.
- W4200037641 created "2021-12-31" @default.
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- W4200037641 date "2021-12-01" @default.
- W4200037641 modified "2023-09-26" @default.
- W4200037641 title "The hindcast of recent tsunamis in Northern Pacific" @default.
- W4200037641 cites W2168346393 @default.
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- W4200037641 doi "https://doi.org/10.1088/1755-1315/946/1/012023" @default.
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