Experts have issued a serious warning about the likelihood of a major 8.0-magnitude earthquake striking the United States within the next 50 years. Such an event would be unprecedented in over three centuries, raising urgent concerns among scientists and emergency planners.

Researchers from Virginia Tech published their findings in the Proceedings of the National Academy of Sciences, highlighting the Cascadia subduction zone as the likely source of the earthquake. This fault line stretches approximately 600 miles from northern California to southern British Columbia.

The potential quake could unleash massive seismic waves, reaching heights of up to 1,000 feet. These waves pose a grave risk to coastal communities, threatening lives and infrastructure. Regions including Alaska, Hawaii, and the U.S. West Coast are identified as particularly vulnerable.

These areas already face challenges from unstable volcanoes, landslide-prone zones, and ongoing seismic activity, compounding the danger posed by such a catastrophic earthquake. The overlapping natural hazards increase the potential for widespread devastation.

The study warns that the earthquake could cause the coastal land to sink by as much as 6.5 feet. This land subsidence would dramatically expand floodplains, making flood risks worse and complicating post-disaster recovery efforts for affected communities.

Tina Dura, lead author and assistant professor at Virginia Tech, stressed the long-term implications of these changes. She highlighted how such land shifts could influence land use planning and prolong the recovery timeline after the event.

Historical evidence from the last megaquake in 1700 reveals similar effects. That event caused land subsidence and created “ghost forests,” stands of dead trees along the Pacific Northwest coast, which still mark the devastation today. The study underscores how increasing coastal development in geophysically unstable regions makes preparedness and resilience more critical than ever.