Earthquake Research Institute, University of Tokyo

Seismic and tsunami hazard potential of the Negros–Sulu megathrust, Philippines

Abstract. The Negros–Sulu megathrust poses an imminent threat to coastal communities surrounding the Sulu Sea, but with limited information on past tsunamis, megathrust geometry, and locked segments, robust seismic and tsunami hazard assessments are hindered. To identify highly e...

Fourier Neural Operator-based surrogate modeling of offshore tsunami propagation and its application to rapid tsunami source inversion

The accurate and rapid estimation of tsunami sources immediately after an earthquake is essential for real-time tsunami forecasting. Recent advances in offshore tsunami observation networks have made it increasingly feasible to estimate tsunami sources from observed waveforms usi...

Complex Upper-Mantle Anisotropy Beneath the Pacific Triangle Revealed by Shear-Wave Splitting

Abstract Understanding mantle flow beneath old oceanic plates is essential for linking present-day plate motions with long-term lithospheric evolution, yet direct constraints remain sparse due to limited offshore observations. Here, we investigate upper-mantle seismic anisotropy...

Tsunami forerunner of the 2024 Noto Peninsula earthquake observed near the mouth of the Kurobe River, Japan

Abstract The 2024 Noto Peninsula earthquake occurred along the northern coast of the Noto Peninsula in Japan and generated a large tsunami. The earthquake also caused submarine landslides that generated local tsunamis in Toyama Bay. When large earthquakes occurred near the coast,...