GEOGRAPHY & CARTOGRAPHY CALCULATOR
Oceantsunami Run Up Height
A precise tool.
What is the Oceantsunami Run Up Height & How does it work?
Tsunamis are long‑wavelength sea waves generated primarily by sudden vertical displacement of the seafloor during earthquakes, landslides, or volcanic eruptions. The initial disturbance creates a wave train that propagates across the ocean with speeds that can exceed 700 km/h.
In deep water the wave length can be hundreds of kilometres, so the wave height is relatively small and the wave passes ships unnoticed. As the wave approaches continental shelves, its speed decreases, wavelength shortens, and energy is compressed, causing a rapid increase in wave height.
When the amplified wave reaches the shoreline, it climbs up the coastal slope. The maximum vertical distance the water reaches above the still‑water level is called the run‑up height, a critical parameter for hazard assessment.
R = 2.1 sqrt{H_0 L_0}
R = run‑up height (m), H_0 = offshore wave height (m), L_0 = deep‑water wavelength (m)
Parameters
Result
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Frequently Asked Questions
What is tsunami run-up height?
Tsunami run-up height refers to the maximum height a tsunami reaches above sea level when it hits land.
How does ocean depth affect tsunami waves?
In deep water, tsunami waves have long wavelengths and small heights. As they approach shallower waters near land, their speed decreases, wavelength shortens, and height increases.
What causes tsunamis?
Tsunamis are primarily caused by sudden vertical displacement of the seafloor during earthquakes, landslides, or volcanic eruptions.
How fast do tsunami waves travel in deep water?
In deep water, tsunami waves can travel at speeds exceeding 700 km/h.
What happens to tsunami waves as they approach land?
As tsunami waves reach shallower waters near land, their speed decreases, wavelength shortens, and height increases significantly.
Why do ships not notice tsunamis in deep water?
In deep water, tsunami waves have long wavelengths and small heights, making them imperceptible to ships.
How can I calculate the run-up height of a tsunami?
To calculate tsunami run-up height, you need to consider factors such as ocean depth, wave characteristics, and coastal topography.
Results are for informational purposes only and do not constitute professional advice.