Nearshore tsunami amplitudes off Sri Lanka due to probable worst-case seismic scenarios in the Indian Ocean

► Comprehensive deterministic assessment of the tsunami hazard to Sri Lanka. ► Numerical simulation of tsunami propagation for eight plausible seismic scenarios. ► Sumatra-Andaman segment yields the worst-case tsunami scenario for Sri Lanka. ► Tsunami heights from other zones less than 20-30% of those from Sumatra-Andaman. ► Results are useful in tsunami evacuation planning and risk management.