Download - California Tsunami Program Richard Eisner, FAIA, Administrator OES Coastal Region & Tsunami Program
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California Tsunami Program
Richard Eisner, FAIA, AdministratorOES Coastal Region & Tsunami Program
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Tsunami-Hits-Pantong-Beach-and-Banda-Ache
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Plate Boundary Earthquakes
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M9.3 Earthquake in Sumatra
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TravelTimes
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Tectonic Context
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Tectonic Cross Section
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How Do Earthquakes Create Tsunamis?
Rapid Sea Floor Deformation and Vertical Displacement
Ocean Above Deformation is Displaced
Waves Form As Displaced Water Levels
Waves Propagate Across Ocean
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Non-Tectonic Tsunamis
Landslides Monterey Bay Palos Verdes Santa Barbara Catalina Island
Undersea Volcanoes
Meteors
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What is a Tsunami Wave?
Long Wave Length (>100km)
Long Period (>1 hour)
High Speed (>700 km/hour)
Little Energy Loss Over Great Distance
Grows in Shallow Water
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Tsunami Inundation
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Challenges
Uncertainty
Unpredictability
Possible Warning?
Limited Mitigation Options to Reduce Risk
Systems Depend on State and Federal Support BUT Local Lead
Infrequency -- Recurrence (?)
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Prediction and Warning
How Do You Describe The Threat A Physical Model for Phenomenon by NOAA Scientific Review by NOAA Where? How Big? Probability of Occurrence? When? Impact and Protective Measures?
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Will There Be A Tsunami?
Tsunami-genesis Inferred From Earthquake Magnitude Location Mechanism Historic Record
Tsunami Confirmed by Tide Gages Distant In Harbors
And Mid-Ocean NOAA Buoys (DART)
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Deep Ocean Assessment and Reporting of Tsunamis (DART)Or“Tsunamometers”