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Puerto Rico Seismic Network Tsunami Program

Tsunami Messages

The objective of the Puerto Rico Seismic Network Tsunami Program is to save lives and minimize property damage. The agencies that provides information to Puerto Rico and Virgin Islands are: Alaska Tsunami Warning Center (federal) and the Puerto Rico Seismic Network (local). The tsunami warnings will be delivered to the focal points: the Puerto Rico State Emergency Management Agency (PRSEMA) and the National Weather Service, forecast office of San Juan. They are responsible in disseminating and activating the tsunami plans in case of need.

There are four levels of tsunami warning. These are:
  • Information Statement: This message is issued to inform the public that a seismic event has occurred with no tsunamigenic potential. Stay calm. No Warning, Advisory or Watch issued for Puerto Rico.

  • Watch:This is the third highest level of emergency alert, it is issued when an event has occurred that may later affect the coastal zone. The watch can later become an advisory, a warning or be cancelled depending on the available information. Remain attentive to further available information and follow all instructions from emergency management authorities.

  • Advisory:This is the second highest level of emergency alert, it is issued if there is potential danger of tsunami generated waves and strong currents. It is recommended to leave the water and the beach. Advisory may become a warning or may be cancelled depending on the information. Remain attentive to further available information and follow all instructions from emergency management authorities.

  • Warning: This is the highest level of emergency alert, it is issued when the coastal tsunami inundation is imminent. The warning can continue for several hours after the arrival of the first wave. It is recommended to evacuate the flooding zone, to go to higher grounds and follow all emergency instructions.


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