Archive · 27 May 2025
Scientists Warn: Mega-Tsunami Threatens US West Coast
Imagine a really big crack under the ocean near the West Coast of the US.
Scientists say if this crack, called the Cascadia Subduction Zone, has a big shake, it could cause giant waves, like a tsunami, up to 1,000 feet tall!
This would flood cities in minutes.
The problem is made worse by rising sea levels and land sinking during an earthquake.
Current warning maps might not be accurate because they don't account for all the changes.
Scientists say we need to prepare better by updating maps, strengthening buildings, and teaching people what to do.
A study warns of potential mega-tsunamis, up to 1,000 feet tall, due to a Cascadia Subduction Zone earthquake.
The Cascadia Subduction Zone has not had a major earthquake in over 300 years.
Rising sea levels and coastal land subsidence could worsen the impact of a future earthquake.
Current tsunami maps may be inadequate and need updates to include sea-level and land-subsidence data.
Communities in Northern California, Oregon, and Washington are at the highest risk.
- Who
- Scientists at Virginia Tech and The Economic Times are reporting the risk.
- What
- A study highlights the potential for catastrophic flooding and mega-tsunamis, possibly triggered by the Cascadia Subduction Zone.
- When
- The study models present day impacts and those expected in the future.
- Where
- Coastal regions of Northern California, Oregon, and Washington.
- Why
- To warn about potential natural disasters and promote disaster preparedness.
- Fault Line Name
- Cascadia Subduction Zone (CSZ)
- Last Major Earthquake
- January 1700 (estimated magnitude 9.0)
- Potential Tsunami Height
- Up to 1,000 feet
- Areas at Highest Risk
- Northern California, Oregon, and Washington
- Earthquake Probability (next 50 years)
- 15% chance of magnitude 8.0 or larger