Experts Alert: 1,000-Foot Tsunami Threat on West Coast—Cascadia Fault 326 Years Past Due

Buzzline

Experts caution that the Cascadia Subduction Zone — a 700-mile fault line stretching from Northern California to British Columbia — is overdue for a significant rupture by 326 years, having last experienced a rupture in 1700 with an average recurrence period of 240 years. A 9.0 magnitude earthquake along this fault could trigger a mega-tsunami, producing waves that might surpass 1,000 feet at the source, with 30-100 feet of water hitting Washington, Oregon, and Northern California in as little as 15 minutes. FEMA forecasts suggest that Oregon could see 10,000 fatalities in the initial hours of such an incident, along with $32 billion in infrastructure damage, yet a majority of residents along the Pacific Northwest coast have never taken part in a tsunami evacuation practice.

Transcript

00:00Beneath the Pacific Ocean, a geological time bomb is ticking.

00:04Scientists say Americans on the West Coast need to understand this risk.

00:08The Cascadia subduction zone, 700 miles of fault from Northern California to British Columbia,

00:15is capable of generating a magnitude 9 earthquake.

00:18The resulting megatsunami could produce 1,000-foot waves at source.

00:23By the time it reaches the U.S. coast, 30 to 100 feet of water still moving at jet aircraft

00:29speed.

00:30Washington, Oregon, Northern California.

00:34Three states, potentially just 15 minutes of warning before impact.

00:39FEMA models project 10,000 deaths in Oregon alone in the first hours.

00:44Infrastructure losses of 32 billion, and the zone is 326 years overdue for a major rupture.

00:50The last major Cascadia rupture was in 1700.

00:54The clock has not stopped since.

00:56Scientists say this risk is not hypothetical.

00:59It is geological reality.

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