# How fast do the fastest tsunami waves travel in the deep ocean?

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## How fast do tsunami waves tend to move in the deep ocean compared to when they reach shore?

Differences between tsunamis and wind-driven waves

Tsunami
Location of Energy Entire water column, from the ocean surface to the ocean floor
Wave- length 300-600 miles (500-1,000 kilometers)
Wave Period 5 minutes-2 hours
Wave Speed Deep water: 500-600 mph (800-1,000 km/h) Near shore: 20-30 mph (30-50 km/h)

## Can you detect a tsunami in the open ocean?

Tsunamis are detected by open-ocean buoys and coastal tide gauges, which report information to stations within the region. Tide stations measure minute changes in sea level, and seismograph stations record earthquake activity.

## How fast do Tsunamis travel on land?

Out on the sea, these waves can be hundreds of miles long but no taller than a few feet and travel at the speed of a jet plane, up to 500 miles per hour. When the waves approach land, they will slow to about 20 or 30 miles an hour and begin to grow in height.

## What is the speed of tsunami waves in Kilometre per hour?

For example, at the deepest ocean depths the tsunami wave speed will be as much as 800 km/h, about the same as that of a jet aircraft. Since the average depth of the Pacific ocean is 4000 m (14,000 feet) , tsunami wave speed will average about 200 m/s or over 700 km/h (500 mph).

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## How do tsunamis travel so fast?

A: Tsunamis travel fast because they have a very long wavelength compared to wind-driven water waves. Tsunamis originate when the entire column of water above the seafloor is uplifted or dropped down. Unlike wind waves, they are driven by gravity.