Saipan, Northern Mariana Islands – Misunderstanding tsunami risks can be deadly across the Northern Mariana Islands, where waves can travel up to 600 mph and reach shore with little warning after nearby seismic activity.
According to the Pacific Tsunami Warning Center, one of the most dangerous myths is that tsunamis arrive as a single wave. In reality, they come in multiple surges that can last for hours, with later waves often stronger than the first to impact Saipan, Tinian, and Rota.
Another common misconception is that there is always time to wait for official alerts. In the western Pacific, locally generated tsunamis can arrive in minutes, especially after nearby undersea earthquakes, leaving little time to react if evacuation is delayed.
Some residents may also believe only certain coastlines are at risk, but all shorelines across the Commonwealth are vulnerable, particularly low-lying coastal areas, reefs, and harbors where water can surge inland quickly.
Officials stress that natural warning signs must be taken seriously. Strong shaking lasting more than 20 seconds or a sudden retreat of ocean water should trigger immediate movement to higher ground.
Preparedness remains critical, as the next tsunami warning could come with little notice and rapidly impact communities across the Northern Mariana Islands.
