The Guide to Earthquakes & Tsunamis in Wallis & Futuna

According to ThinkHazard.org, Wallis and Futuna is classified as having a medium earthquake hazard. This means there is an estimated 10% chance of potentially damaging earthquake shaking within the next 50 years.

Most earthquakes that could affect Wallis and Futuna occur offshore beneath the ocean floor. For this reason, the potential risk of tsunamis is often a greater concern than ground shaking alone.

Tsunamis are among the most serious natural hazards affecting Wallis and Futuna. They are typically triggered by offshore earthquakes, although undersea landslides and volcanic activity can also generate tsunami waves.

According to global hazard assessments, Wallis and Futuna is classified as having a high tsunami risk, with more than a 40% chance of a potentially damaging tsunami occurring within the next 50 years. This elevated level of risk means that coastal areas are particularly vulnerable and preparedness is essential.

While the territory has not experienced a catastrophe on the scale of some neighbouring Pacific islands in recent history, its location in a tectonically active region means tsunamis remain a significant natural hazard. Understanding evacuation routes and heeding official warnings are key to staying safe.

How to Prepare for a Tsunami in Wallis and Futuna

Wallis and Futuna is part of the wider Pacific tsunami monitoring network, with alerts issued through regional warning systems and local authorities. However, travellers should take additional precautions to stay informed and prepared:

• Monitor alerts from the Pacific Tsunami Warning Center (PTWC) and other official Pacific warning services.
• Familiarise yourself with local evacuation routes, especially if staying near the coast, and take note of any posted evacuation signage.
• Pay close attention to official warnings broadcast via radio, local media and government communication channels.

If you feel strong or prolonged ground shaking, move immediately to higher ground without waiting for an official warning.

What to Do if a Tsunami Warning is Issued

Tsunami warnings in Wallis and Futuna are communicated through regional Pacific alert systems, local authorities, and media broadcasts. Natural warning signs may also occur, such as strong or prolonged ground shaking, the ocean suddenly receding, or unusual roaring sounds coming from the sea.

If any of these signs occur, take the following steps immediately:

• Do not wait for an official warning if you observe natural tsunami signs—act straight away.
• If you are near the coast, move inland and to higher ground immediately.
• Follow designated tsunami evacuation routes and signage, and head to the safest elevated area available.

After a tsunami, continue monitoring official announcements via radio or other local communication channels. Only return to coastal areas once authorities have confirmed it is safe to do so.

Now that you know about the natural disaster risks in Wallis and Futuna, here are the answers to the internet's frequently asked questions about earthquakes, tsunamis and natural disasters in this Pacific territory!

Are earthquakes common in Wallis and Futuna?

Yes, earthquakes are relatively common in Wallis and Futuna due to its location in the Pacific Ring of Fire. The territory sits on active tectonic plate boundaries, making seismic activity a regular occurrence, though most earthquakes are minor and rarely cause significant damage.

Is there a tsunami risk in Wallis and Futuna?

Yes, there is a tsunami risk in Wallis and Futuna, particularly from earthquakes occurring in the broader Pacific region. The territory is part of the Pacific Tsunami Warning System, and local authorities have evacuation plans in place for coastal areas.

What natural disasters occur most frequently in Wallis and Futuna?

The most frequent natural disasters in Wallis and Futuna include tropical cyclones during the cyclone season (November to April), earthquakes due to tectonic activity, and occasional flooding from heavy rainfall. Droughts can also occur during prolonged dry periods.

When is cyclone season in Wallis and Futuna?

Cyclone season in Wallis and Futuna typically runs from November to April, with the peak activity occurring between December and March. During this period, the territory can experience severe weather conditions including strong winds, heavy rainfall and potential flooding. For more information, check out Cyclone Safety in Wallis & Futuna: How to Prepare for a Cyclone in Wallis & Futuna.

Are there early warning systems for natural disasters in Wallis and Futuna?

Yes, Wallis and Futuna has early warning systems in place, including participation in the Pacific Tsunami Warning System and cyclone tracking through Météo-France. Local radio stations and authorities provide updates and evacuation instructions when necessary.

What should visitors do during an earthquake in Wallis and Futuna?

During an earthquake in Wallis and Futuna, visitors should drop to their hands and knees, take cover under a sturdy table or against an interior wall, and hold on until the shaking stops. If near the coast, move to higher ground immediately after the shaking stops due to potential tsunami risk.