skip to Main Content

NOAA NCTR research product
Not an official forecast

Shunichi Koshimura
Tsunami Research Program,
Pacific Marine Environmental Laboratory, NOAA


Information URL

Numerical modeling of tsunami

Numerical modeling of tsunami was performed by using TUNAMI code, provided by DCRC, Tohoku University. Bathymetry data used in this model is "Sandwell-Smith sea floor topography". Grid size is 2min. Seismic deformation modeling is based on the fault parameters estimated by Earthquake Information Center of Earthquake Research Institute, University of Tokyo.

[Earthquake mechanisms (EIC, in Japanese)]

Model : EIC 1

  • Origin (Epicenter) = (12.8 N, 88.8 W)
  • (Strike, Dip, Slip) = (152, 33, -78)
  • (L,W) = (50 km, 30 km)
  • Dislocation = 3.1 m
  • Depth = 30 km (Estimated 50 km originaly in EIC)

Model : EIC 2

  • Origin (Epicenter) = (12.8 N, 88.8 W)
  • (Strike, Dip, Slip) = (318, 58, -98)
  • (L,W) = (50 km, 30 km)
  • Dislocation = 3.1 m
  • Depth = 30 km (Estimated 50 km originaly in EIC)

[Seismic deformation modeling]

[Computed tsunami waveforms]

See this map for points of modeling output.

[Maximum water surface elevation]

[Wave ray analysis]