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Adapting PTWC’s Real-Time Tsunami Travel Time Display for Science on a Sphere

Adapting PTWC’s Real-Time Tsunami Travel Time Display for Science on a Sphere. Nathan Becker Pacific Tsunami Warning Center SOS Users Collaborative Network Workshop 31 July 2008. PTWC’s Mission.

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Adapting PTWC’s Real-Time Tsunami Travel Time Display for Science on a Sphere

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  1. Adapting PTWC’s Real-TimeTsunami Travel Time Displayfor Science on a Sphere Nathan Becker Pacific Tsunami Warning Center SOS Users Collaborative Network Workshop 31 July 2008

  2. PTWC’s Mission • Provide warnings of tsunamis to the public and to organizations responsible for public safety in coastal areas of the Pacific Ocean, Indian Ocean (since 2005) and the Caribbean Sea (since 2006) • Rapidly detect phenomena that cause tsunamis and assess their tsunami potential • Detect and monitor tsunamis when they occur, predict when they will arrive at affected coastlines, and continue to provide updated information about tsunamis throughout their duration

  3. PTWC Operations Room

  4. How It Works • C-shell scripts running under Red Hat Linux making calls to off-the-shelf open-source software packages: • Generic Mapping Tools (GMT v.4) • Tsunami Travel Time (TTT v.3, from Geoware) • shallow-water wave approximation with a Huygens construction method • XPlanet • ImageMagick • espeak with MBROLA for text-to-speech synthesis • Images displayed by “slide-show” software: • Screensaver • SOS slideshow display

  5. Hypocenter Map

  6. Regional Tsunami Travel Time

  7. Global Tsunami Travel Time Map

  8. TTT Map + 1 Hour

  9. TTT Map + 2 Hours

  10. TTT Map + 3 Hours

  11. TTT Map + 4 Hours

  12. TTT Map + 5 Hours

  13. TTT Animationson the Sphere • Historical Tsunamis: • Aleutians, Alaska, April 1, 1946 • Chile, May 22, 1960 • Indonesia, December 26, 2004

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