Jan. 26, 1700 is the last time a 9.0 earthquake and tsunami started on the Cascadia Subduction Zone. We know the exact date of the tsunami, Jan. 26, 1700, because the tsunami eventually hit Japan and the Japanese recorded it as an "orphan" tsunami. Geologic records on the Washington state coast match that approximate date, as well. Our Hazards and Outreach team are here to tell you a bit more about this event, but more importantly, what you can do to be more prepared for the next one. | Washingt

🚨CASCADIA MEGAQUAKE RISK – WHAT THE NEW DATA REALLY SAYS Scientists have not issued a magic “final warning,” but the latest research on the Cascadia Subduction Zone is brutal. • A new B.C. risk analysis says about 78% of British Columbia’s critical facilities – hospitals, emergency centers, power and water infrastructure – are exposed to serious damage in a Cascadia megathrust scenario. • A 2025 study in PNAS shows the next Cascadia 8–9 earthquake could drop parts of the Pacific Northwest coast

🚨Cascadia Fault: 6.0 Earthquake Just Hit Off Oregon Cascadia’s offshore fault system just reminded us it is alive. A magnitude 6.0 earthquake hit off the Oregon coast at 7:25 p.m. Pacific on January 15, 2026, about 183 miles west of Bandon at a shallow depth of roughly 10 km. USGS says shaking on land was light and there was no tsunami, but that is not the whole story. This quake struck on the offshore plate boundary in front of the Cascadia Subduction Zone, one of the most dangerous earthquake