Still, experts emphasize that the risk remains over the long term. A 2025 study predicts a major CSZ earthquake is nearly inevitable by 2100, with a 37% chance of occurring within the next 50 years. Should a quake between 8.0 and 9.0 strike, models suggest a potential mega tsunami of up to 100 feet, capable of devastating the nearby coast. FEMA’s 2022 emergency report estimates that such an event could injure over 100,000 people and damage or destroy more than 618,000 buildings.
Historically, the last massive CSZ earthquake occurred on January 26, 1700. Scientists estimate it measured 9.0 in magnitude and triggered a mega tsunami that wiped out Pachena Bay in British Columbia, with waves reaching up to 100 feet just 30 minutes after the quake.
Thursday night’s quake caused no reported injuries or property damage, but it serves as a stark reminder of the region’s seismic potential and the importance of preparedness.
For residents along the West Coast: make sure your emergency plans are up to date, kits are stocked, and evacuation routes are clear—because when it comes to earthquakes, preparation is the best protection.