top of page
Development of JAGURS


In an international collaboration, we develop tsunami software (JAGURS) to achieve highly accurate tsunami prediction. JAGURS uses a nonlinear dispersive wave model in that tsunamis with short wavelength propagate slowly, while nonlinear shallow-water (nondispersive) wave models are standard in tsunami calculations. In addition, JAGURS has made it possible to accurately predict far-field tsunamis by incorporating the self-attraction and loading effect of the earth's deformation during tsunami propagation. JAGURS also implements a nesting algorithm that can increase the resolution of specific regions and is parallelized by using OpenMP and MPI to enable large-scale calculations on supercomputers. Multi-scenario execution function is also available to compute multiple scenarios simultaneously. The source code is available on GitHub.


The 2011 Tohoku tsunami simulation. The star indicates the epicenter of the 2011 Tohoku earthquake. The triangles are tsunami stations of DART network.

(a),(b) 非線形分散波理論による津波シミュレーション(赤)と観測記録(黒),(c),(d) 非線形分散波理論に津波荷重により地球がたわむ効果と海水の鉛直密度分布の効果を考慮した遠地津波シミュレーションと観測記録の比較(Baba et al., 2017, Ocean Modeling).観測記録の再現性が向上しているのがわかる.

(a),(b) Observed (black) and synthetic (red) tsunami waveforms obtained by the nonlinear dispersive wave model,(c),(d) Observed (black) and synthetic (red) tsunami waveforms obtained by the nonlinear dispersive wave model with the self attraction and loading effect(Baba et al., 2017, Ocean Modeling). Improvement in the agreement between the observed and synthetic waveforms is apparent.

bottom of page