Hierarchy classification:

1. top of the aat hierarchies
2. Activities Facet
3. Events (hierarchy name)
4. events (activities)
5. natural events
6. waves (natural events)

Additional parents:

1. top of the aat hierarchies
2. Associated Concepts Facet
3. Associated Concepts
4. scientific concepts
5. physical sciences concepts
6. earth sciences concepts
7. tides

Anotations

Scope note:

Accurately, refers to high water waves caused by the movement of the tide. Now in common usage, refers to exceptionally large and often destructive ocean waves caused by an earthquake, landslide, or other event.