National Tsunami Hazard Mitigation Program (NTHMP)
BACKGROUND
The Gulf of Mexico states have been included to the U.S. Tsunami Warning System since January 2005. The main purpose of the warning system is to enable local emergency management to act in response to warnings. To plan for the warning response, emergency managers must understand what specific areas within their jurisdictions are threatened by tsunamis. Potential tsunami sources for the GOM are local submarine landslides and earthquakes (induced co-seismic tsunami source) along the Caribbean plate boundary faults. However, preliminary modeling of potential tsunami sources outside the GOM has indicated a very low threat and may not pose a tsunami hazard to the GOM coastal communities or infrastructure. Nevertheless, recent assessments of tsunami hazards along the Gulf of Mexico (GOM) carried out by the U.S. Geological Survey (USGS) and the National Tsunami Hazard Mitigation Program (NTHMP) have identified underwater landslides as the primary potential source of tsunami generation. Although a massive underwater landslide in the GOM is considered a potential hazard, the probability of such an event is quite low. The probability of occurrence is related to large ancient landslides which were probably active prior to 7,000 years ago when large quantities of sediments were emptied into the GOM. However, nowadays sediments continue to empty into the GOM mainly from the Mississippi river. The sediment supply contributes to slope steepening and also to the increasing of the excess pore water pressure in the underlying soils, which may lead to further landslide activities. Recent evidence from seismic records of small-scale energetic seismic-waves in the GOM have confirmed that there is a probability of recurrence.
NTHMP-GOM Story
TAMUG-NTHMP Projects Summary: For a Safer Gulf of Mexico Coastline
MODELING AND MAPPING SUBCOMITTEE and WORKSHOP PRESENTATIONS
NTHMP Summer Meeting. Seattle, PMEL 19-22 AUG/2014
Tsunami Inundation Map Products
- South Padre Island TX inundation, current, vorticity, momentum flux
- Mustang Island TX
- Port Aransas inundation, current, vorticity, momentum flux
- South-East Corpus Christi inundation, current, vorticity, momentum flux
- Galveston TX, current, vorticity, momentum flux
- Mobile, Al
- Dauphin Island / Gulf Highlands inundation, current, vorticity, momentum flux
- Mobile inundation, current, vorticity, momentum flux
- Pensacola, FL inundation, current, vorticity, momentum flux
- Santa Rosa County FL
- East Gulf Breeze inundation, current, vorticity, momentum flux
- Navarre inundation, current, vorticity, momentum flux
- Okaloosa County FL
- Okaloosa Island inundation, current, vorticity, momentum flux
- Destin inundation, current, vorticity, momentum flux
- Panama City FL inundation, current, vorticity, momentum flux
- Tampa FL
- Northern Greater Tampa Area inundation, current, vorticity, momentum flux
- Southern Greater Tampa Area inundation, current, vorticity, momentum flux
- Key West FL inundation, current, vorticity, momentum flux
- Osprey-Venice-Englewood, FL
- Osprey-Venice inundation, current, vorticity, momentum flux
- Englewood inundation, current, vorticity, momentum flux
- Sanibel Island-Naples, FL
- Sanibel Island inundation, current, vorticity, momentum flux
- Naples inundation, current, vorticity, momentum flux
- Grand Isle, LA inundation, current, vorticity, momentum flux
- Freeport, TX
- Freeport inundation, current, vorticity, momentum flux
- San Luis Pass inundation, current, vorticity, momentum flux
- Jamaica Beach, TX, current, vorticity, momentum flux
- South Tampa, FL
- Don Pedro Island-Boca Grande-Captiva Island, FL
- Marco Island inundation, current, vorticity, momentum flux <NEW>
UNDER DEVELOPMENT
West of Pensacola, FL (Gulf Shore, Orange Beach, and Perdido key) and Mexico beach, FL