Adapting PTWC’s Real-TimeAdapting PTWC’s Real-TimeTsunami Travel Time DisplayTsunami Travel Time Display

for Science on a Spherefor Science on a Sphere

Nathan BeckerNathan Becker

Pacific Tsunami Warning CenterPacific Tsunami Warning Center

SOS Users Collaborative Network WorkshopSOS Users Collaborative Network Workshop

31 July 200831 July 2008

PTWC’s MissionPTWC’s Mission

Provide warnings of tsunamis to the public and to Provide warnings of tsunamis to the public and to organizations responsible for public safety in coastal organizations responsible for public safety in coastal areas of the Pacific Ocean, Indian Ocean (since 2005) areas of the Pacific Ocean, Indian Ocean (since 2005) and the Caribbean Sea (since 2006) and the Caribbean Sea (since 2006)

Rapidly detect phenomena that cause tsunamis and Rapidly detect phenomena that cause tsunamis and assess their tsunami potentialassess their tsunami potential

Detect and monitor tsunamis when they occur, predict Detect and monitor tsunamis when they occur, predict when they will arrive at affected coastlines, and when they will arrive at affected coastlines, and continue to provide updated information about continue to provide updated information about tsunamis throughout their durationtsunamis throughout their duration

PTWC Operations RoomPTWC Operations Room

How It WorksHow It Works

C-shell scripts running under Red Hat Linux making C-shell scripts running under Red Hat Linux making calls to off-the-shelf open-source software packages:calls to off-the-shelf open-source software packages:• Generic Mapping Tools (GMT v.4)Generic Mapping Tools (GMT v.4)

• Tsunami Travel Time (TTT v.3, from Geoware)Tsunami Travel Time (TTT v.3, from Geoware)– shallow-water wave approximation with a Huygens construction methodshallow-water wave approximation with a Huygens construction method

• XPlanetXPlanet

• ImageMagickImageMagick

• espeak with MBROLA for text-to-speech synthesisespeak with MBROLA for text-to-speech synthesis

Images displayed by “slide-show” software:Images displayed by “slide-show” software:• ScreensaverScreensaver

• SOS slideshow displaySOS slideshow display

Hypocenter MapHypocenter Map

Regional Tsunami Travel TimeRegional Tsunami Travel Time

Global Tsunami Travel Time MapGlobal Tsunami Travel Time Map

TTT Map + 1 HourTTT Map + 1 Hour

TTT Map + 2 HoursTTT Map + 2 Hours

TTT Map + 3 Hours TTT Map + 3 Hours

TTT Map + 4 HoursTTT Map + 4 Hours

TTT Map + 5 HoursTTT Map + 5 Hours

TTT AnimationsTTT Animationson the Sphereon the Sphere

Historical Tsunamis:Historical Tsunamis:• Aleutians, Alaska, April 1, 1946Aleutians, Alaska, April 1, 1946

• Chile, May 22, 1960Chile, May 22, 1960

• Indonesia, December 26, 2004Indonesia, December 26, 2004