About SWIFT-TSUNAMI system

NIED developed a system for the near-real time calculation of regional tsunamis (SWIFT-TSUNAMI) based on the source mechanism parameters (Inazu et al., 2016). The SWIFT-TSUNAMI system uses the automatic calculation of moment tensors by SWIFT system (Nakano et al., 2008) in Indonesia, Philippines and Latin American (origin time, location moment magnitude, and fault mechanism), to carry out the automatic simulation and visualization of tsunami. The system generates maps of maximum tsunami heights within the target regions and along the coasts and display those along with the fault model parameters used for the simulations. The SWIFT-TSUNAMI system performs tsunami calculations for the two fault plane solutions obtained by SWIFT and selects the tsunami simulation results corresponding to the largest tsunami height at the coast (worse-case scenario).

Automatic and manual tsunami calculations by SWIFT-TSUNAMI system at NIED are performed for seismic events in South-East Asia (Indonesia and Philippines) and Latin America, for earthquakes with magnitude larger than 7 and depth shallower than 100 km. All results of earthquake mechanism parameters and tsunami simulation obtained by the SWIFT-TSUNAMI system are made available through our web page (www.isn.bosai.go.jp).

References

Inazu D., Pulido, N. and E. Fukuyama, J. Senda and H. Kumagai, Near-field tsunami forecast system based on near real-time seismic moment tensor estimation in the regions of Indonesia, the Philippines, and Chile, Earth Planets and Space, 68, 1-18, 2016.

Nakano, M., H. Kumagai, and H. Inoue, Waveform inversion in the frequency domain for the simultaneous determination of earthquake source mechanism and moment function, Geophys. J. Int., 173, 1000-1011, 2008.