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PACIFIC TSUNAMI WARNING CENTER Ewa Beach, Hawaii

PACIFIC TSUNAMI WARNING CENTER Ewa Beach, Hawaii. US Department of Commerce National Weather Service. PACIFIC TSUNAMI WARNING CENTER Ewa Beach, Hawaii. US Department of Commerce / National Weather Service. PTWC.

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PACIFIC TSUNAMI WARNING CENTER Ewa Beach, Hawaii

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  1. PACIFIC TSUNAMI WARNING CENTEREwa Beach, Hawaii US Department of Commerce National Weather Service

  2. PACIFIC TSUNAMI WARNING CENTEREwa Beach, Hawaii US Department of Commerce / National Weather Service

  3. PTWC

  4. Left:Conceptual drawing of assumed convection cells in the mantle. Below a depth of about 700 km, the descending slab begins to soften and flow, losing its form. Right: Sketch showing convection cells commonly seen in boiling water or soup. This analogy, however, does not take into account the huge differences in the size and the flow rates of these cells.

  5. TSUNAMI GENERATED BY EARTHQUAKE

  6. Pacific Teletsunami Problem: 1-Hr Isochrons

  7. Peru Tsunami 23 JUN 2001 2033 UTC 16.2S 73.4W 8.0Ms Arica, Chile HILO, HI

  8. NOAA Proposed Siting of Real-TimeTsunami Detectors

  9. Design for Tsunami Real-TimeReporting System

  10. First wave may be a receding wave.

  11. Steel roofing material wrapped easily around a tree. Sissano Village.

  12. A debris line 150 m inland. Aitape, east of the pier.

  13. House supports laid over in liquified sediments by the force of the wave. East bank of Arnold River.

  14. A giant wave engulfs the pier at Hilo, Hawaii, during the 1946 tsunami, which killed 159 people. The arrow points to a man who was swept away seconds later. (Photograph courtesy of NOAA/EDIS.)

  15. This image shows Lituya Bay, Alaska, after a huge, landslide-generated tsunami occurred on July 9, 1958. The earthquake-induced rockslide, shown in upper right-hand corner of this image, generated a 525 m splash-up immediately across the bay, and razed trees along the bay and across LaChausse Spit before leaving the bay and dissipating in the open waters of the Gulf of Alaska. Source: Lander, and P. Lockridge

  16. Tsunami Safety Tips • If you feel strong shaking, move quickly away from shore to high ground. Don’t wait for a warning! • If the sea recedes unusually, don’t investigate - get to high • ground. • You can’t outrun a tsunami. • A tsunami is a series of waves -- the first is often not • the largest. • The danger can last for many • hours.

  17. Tsunami Safety Tips • Tsunamis wrap around islands and are sometimes largest on the shoreline away from the source. • Even a small tsunami can produce strong and unusual currents that are a hazard to swimmers and boaters. • Tsunamis can be very large. Runups as high as 50 feet have been measured in Hawaii. Inundation may extend several hundred feet from the coast.

  18. Tsunami Safety Tips • Tsunamis can travel great distances up low lying valleys and in the channels of rivers and streams. • The moving water of a tsunami has tremendous force, and it can carry objects weighing many tons. • The debris carried by a tsunami can be more destructive than the water. • Never think you can surf a tsunami!

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