Laura Kong Director, UNESCO IOC ITIC David Coetzee NZ National Exercise Coordinator
Tsunami Crash Course Images from UNESCO IOC Brochure: Tsunami: The Great Waves.
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Tsunami Crash Course Images from UNESCO IOC Brochure: Tsunami: The Great Waves
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Transcript of Tsunami Crash Course Images from UNESCO IOC Brochure: Tsunami: The Great Waves.
Tsunami Crash Course
Images from UNESCO IOC Brochure:Tsunami: The Great Waves
Shallow Water Wave!
• C = √(gd)
Similar to surge, much depends on bathymetry
Near shore
Deep water
Before and After
• Warnings:– If close to event center, only defense is to head
for high ground (U. West Coast, esp. Wash/Ore.)
– Sometimes there is time to warn, or at least cancel warnings (DART)
Crescent City, CATsunami Magnet
• Offshore Bathymetry (underwater Topography): Mendocino Fracture Zone
• Shape of near-shore shelf • Shape of coastline itself– 8 Feet in Sendai Tsunami– 22+ feet in 1964 (from
Alaskan Earthquake)
