In the open ocean, how does the passage of a tsunami wave differ from ordinary wind-driven surface waves?
Answer and explanation
Correct answer: C. tsunamis possess extremely long wavelengths of hundreds of kilometers and travel across the entire water column
- Step 1: In deep water, a tsunami has an immense wavelength (100–200 km) and moves as a shallow-water wave through the entire water column at jet speeds (700–800 km/h) with small surface amplitude (< 1 m). Answer: tsunamis possess extremely long wavelengths of hundreds of kilometers and travel across the entire water column. Why not the others: In deep water, their surface height is barely noticeable; they move rapidly, not slowly.
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