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California Tsunami Program

California Tsunami Program. Richard Eisner, FAIA, Administrator OES Coastal Region & Tsunami Program. Tsunami-Hits-Pantong-Beach-and-Banda-Ache. Plate Boundary Earthquakes. M9.3 Earthquake in Sumatra. Travel Times. Tectonic Context. Tectonic Cross Section.

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California Tsunami Program

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  1. California Tsunami Program Richard Eisner, FAIA, Administrator OES Coastal Region & Tsunami Program

  2. Tsunami-Hits-Pantong-Beach-and-Banda-Ache

  3. Plate Boundary Earthquakes

  4. M9.3 Earthquake in Sumatra

  5. Travel Times

  6. Tectonic Context

  7. Tectonic Cross Section

  8. 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

  9. Non-Tectonic Tsunamis • Landslides • Monterey Bay • Palos Verdes • Santa Barbara • Catalina Island • Undersea Volcanoes • Meteors

  10. 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

  11. Tsunami Inundation

  12. Challenges • Uncertainty • Unpredictability • Possible Warning? • Limited Mitigation Options to Reduce Risk • Systems Depend on State and Federal Support BUT Local Lead • Infrequency -- Recurrence (?)

  13. 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?

  14. 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)

  15. Deep Ocean Assessment and Reporting of Tsunamis (DART) Or “Tsunamometers”

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