4 Geography · 4.1.2 Interior of the Earth and plate tectonics
4.1.2.7 Tsunamis: how they form and early warning systems
A tsunami is a series of very long sea waves set off by a sudden vertical shift of the sea floor, usually an undersea earthquake; harmless-looking in the open ocean, it slows and towers up near the coast, so warning depends on detecting the earthquake and the wave within minutes.
- APPSC Group 1
- Advanced level
- 9 min read
- Full course
Key terms
- tsunami
- harbour wave
- seismic sea wave
- subduction
- vertical displacement
- shoaling
- drawback
- 2004 Indian Ocean tsunami
- Tohoku 2011
- INCOIS
- ITEWC
- DART buoy
- bottom pressure recorder
- World Tsunami Awareness Day
- Tsunami Ready
What this note covers
- Core factsFoundation
- ExplainedStandard
- DeeperAdvanced
- AP angleStandard
- Mains writingMains writing
- Common trapsFoundation
- Quick revisionFoundation
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