PhysicsChapter 3: Waves
Tsunamis
Introduction
A tsunami is a series of large ocean waves produced by the sudden displacement of a large volume of water. Common causes include: undersea earthquakes; submarine landslides; * volcanic activity.
Definition
Deep Ocean
In deep water, tsunami waves can travel at very high speed while having relatively small height and very long wavelength.
Near the Coast
As the wave enters shallower water: * its speed decreases; * wavelength decreases; * wave height can increase significantly. This process makes tsunami waves dangerous near coastlines.
Important Distinction
A tsunami is not simply a normal wind-generated ocean wave. It involves motion of a much larger water column and has a much longer wavelength.
Warning
Seismic monitoring, ocean buoys and coastal warning systems can help detect tsunami hazards.
Exam preparation
Exam Focus
Quick revision
Revision Zone
Review the key facts, formulas and checks before you move on.Tsunamis
Sticky Notes · Quick Revision
CAUSE
- Water displacement
DEEP
- Fast + low height
SHALLOW
- Slow + taller
60-second revision
- Cause → water displacement
- Deep → fast + low height
- Shallow → slow + taller
Did you understand this topic?
Your answer is saved with your learning record. It does not mark the topic as mastered.