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Scientists warn mega tsunami could wipe out part of US before 2100

Home> News> Science

Published 12:00 23 May 2025 GMT+1

Scientists warn mega tsunami could wipe out part of US before 2100

Scientists at Virginia Tech have published a study claiming that a tsunami could hit the US coast within 50 to 75 years

Joshua Nair

Joshua Nair

Scientists have issued an urgent warning to the public about a possible seismic event that could happen in the not-so-distant future.

The new study claims that a part of America could be wiped off the face of the Earth, if an earthquake powerful enough hits an active fault line by 2100.

There are a lot of factors at play here, but the bottom line is that a mega-tsunami could impact the US relatively soon.

The nation's west coast is at risk, with the fault at risk running from Northern Vancouver Island to Cape Mendocino in California.

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Running about 620 miles in length, it's called the Cascadia Subduction Zone and it holds the title of being the sixth largest fault line in the world.

Coastal areas on the west coast of America would be destroyed (Getty Stock Image)
Coastal areas on the west coast of America would be destroyed (Getty Stock Image)

What is the Cascadia Subduction Zone?

The fault is still some 180 miles short of the infamous San Andreas line, which runs across California, but it highlights more potential dangers in a similar area.

Marking the boundary between the Juan de Fuca Plate and the North American Plate, it has the potential to produce massive earthquakes, with the estimated magnitude 9.0 event of 1700 standing out in history.

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This caused a 50-foot high tsunami across the Pacific Ocean, with the fault known in the scientific community as a sleeping giant with huge potential.

It was also the last time a large seismic magnitude earthquake occurred along the fault.

Warnings of a magnitude 8.0 earthquake

A number of Virginia Tech geoscientists published findings that estimated that there's a 15 percent chance of a brutal 8.0 earthquake hitting the area in the next 50 years, and a 29 percent chance of it happening by 2100.

Writing in the Proceedings of the National Academy of Sciences, they titled their paper 'Increased flood exposure in the Pacific Northwest following earthquake-driven subsidence and sea-level rise'.

What effects would this have?

The earthquake could have monumental repercussions, potentially flushing away cities near the coast in in Northern California, Oregon and Washington such as Seattle and Portland, while coastal land could sink anywhere up to six and a half feet.

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The scientists warned in the study: "Under future climate-driven sea-level rise scenarios, tsunamis created by more common, smaller magnitude earthquakes can have the same coastal wave heights as rare, great-earthquake generated tsunamis."

Lead author Tina Dura told NBC News: "This lesser talked about hazard is going to persist for decades or centuries after the earthquake.

"The tsunami will come in and wash away and it’s going to have big impacts, don’t get me wrong, but the lasting change of the frequency of flooding … that’s going to have to be dealt with."

The scientists said that if the earthquake happened in 2100, amplified by the effects of climate change, 17,710 people, 29,060 buildings and 1,620km of road would be exposed to flooding.

Farmland would be drenched in salt water, resulting in huge financial losses.

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Five airports, 18 critical facilities like schools, hospitals and police stations, and one electrical substation would also be exposed to the floodwaters.

The 1,000-foot mega-tsunami would have catastrophic effects on the US (Getty Stock Image)
The 1,000-foot mega-tsunami would have catastrophic effects on the US (Getty Stock Image)

Will there be any warning signs?

Unfortunately, unlike climate-driven events, it is explained that this potential earthquake could 'happen within minutes, leaving no time for adaptation or mitigation'.

Dura explained: “The expansion of the coastal floodplain following a Cascadia subduction zone earthquake has not been previously quantified, and the impacts to land use could significantly increase the timeline to recovery.”

Featured Image Credit: Getty Stock Image

Topics: US News, Science

Joshua Nair
Joshua Nair

Joshua Nair is a journalist at LADbible. Born in Malaysia and raised in Dubai, he has always been interested in writing about a range of subjects, from sports to trending pop culture news. After graduating from Oxford Brookes University with a BA in Media, Journalism and Publishing, he got a job freelance writing for SPORTbible while working in marketing before landing a full-time role at LADbible. Unfortunately, he's unhealthily obsessed with Manchester United, which takes its toll on his mental and physical health. Daily.

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@joshnair10

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