Experts warn three areas are at risk of being hit by 1,000ft 'mega-tsunami'

Environmental experts have revealed the three areas which would most affected in the event of a 'mega-tsunami'.

For all the technological advances humans have made over the past couple of centuries, when it comes to the power of mother nature we're still very much at her mercy.

From deadly hurricanes, tornadoes, earthquakes and volcanic eruptions, our reactions to environmental disasters is more about mitigation than prevention.

What scientists and experts can do is be on the lookout for warning signs at potential flashpoints and plan accordingly.

One such place is the Cascadia Subduction Zone, a 1,000km (620 mile) long region which is considered a major earthquake and tsunami hazard zone.

So where is the Cascadia Subduction Zone – and which places would be most impacted by an earthquake of tsunami in that region?

(Getty Stock Images)

Cascadia Subduction Zone explained

Located around 100–200km (70–100 miles) off the Pacific coast of North America, the Cascadia Subduction Zone is an area where two tectonic plates converge.

In this case, we have the Juan de Fuca, Explorer and Gorda plates sliding under the larger North American plate. The area spans the coast off northern California to British Columbia.

Cast your mind back to secondary school geography lessons and you'll likely recall that two tectonic plates scraping alongside each other isn't good news, as it can lead to earthquakes and (depending on the location) tsunamis.

How dangerous is the Cascadia Subduction Zone?

Experts have warned about the likelihood of another earthquake occurring along the Cascadia Subduction Zone, with their findings recently being published in the Proceedings of the National Academy of Sciences.

An earthquake in the region could lead to a mega-tsunami seeing waves as high as 1,000ft crashing into communities across the US.

The states of California, Washington and Oregon would likely face the largest impact, however, the impact could also reach as far as Alaska and Hawaii.

The location of the Cascadia Subduction Zone (Washington County Oregon Government)

If such an event were to happen, the Federal Emergency Management Agency (FEMA) estimates 13,000 fatalities while a further 27,000 could be injured.

This would make it the deadliest natural disaster in US history.

"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," Tina Dura, the lead author of the study, said.

1700 Cascadia earthquake

Geological records state that earthquakes occurring at a a magnitude 8.0 or greater typically happen around every 500 years or so.

The last recorded earthquake recorded in the region occurred in 1700, which means another earthquake grows more likely with each passing year.

Experts currently believe there is a 15 percent chance of a magnitude 8.0 or greater earthquake occurring within the next 30 years.