Pago Pago, American Samoa – Misconceptions about tsunamis can be deadly in American Samoa, where waves traveling up to 600 mph across the Pacific can reach shore within minutes after a nearby earthquake.
According to the Pacific Tsunami Warning Center, one of the most dangerous myths is that a tsunami is a single wave. In reality, multiple surges can arrive over several hours, with later waves often stronger than the first to impact coastal villages including Pago Pago, Leone, and Fagatogo.
Another common belief is that there is always time to wait for an official warning. In American Samoa, locally generated tsunamis can arrive in as little as 10 to 20 minutes after strong ground shaking, leaving little time for alerts to be issued before impacts begin.
Some residents may also assume only certain coastlines are at risk, but the entire territory remains vulnerable, especially low-lying coastal areas and harbors where water can surge inland rapidly.
Officials stress that natural warning signs are critical. If strong shaking lasts more than 20 seconds or the ocean suddenly recedes, residents should immediately move to higher ground without waiting for instructions.
Preparedness remains essential, as the next tsunami threat could develop quickly with little warning across American Samoa.
