Which mechanism causes anomalously high tsunami run-up following a megathrust earthquake?

💡 Explanation

When a seismic wave from an earthquake enters a shallow continental shelf, the wavelength decreases while the energy remains constant because of wave shoaling, leading to resonant amplification, thus a larger tsunami. Therefore, resonant amplification occurs, rather than speed, depth, or atmosphere, requiring complex hydrodynamics and shelf geometry.

• Which consequence results when concentrated sulfuric acid leaching accelerates in sulfide ore tailings?
• Which impact results on global carbon cycling when El Niño Southern Oscillation (ENSO) conditions intensify?
• Which effect results when trade winds approach the equator in a Walker circulation cell?
• Which outcome results when decreased sea ice alters Arctic streams?
• Which phenomenon causes formation of elongated offset drainage patterns along transform faults?
• Which risk significantly increases near a subduction zone after a megathrust earthquake?