Cascadia Earthquake Preparedness Assessment

The video discusses the Cascadia Subduction Zone, a major fault line off the Pacific Northwest coast, which poses a significant earthquake threat. It compares this fault line with the more well-known San Andreas Fault, highlighting the potential for a much larger earthquake. The video explores the possible impacts of such an earthquake, including widespread destruction and a subsequent tsunami. It also addresses the preparedness of the region and the challenges in recovery and rebuilding efforts.

What is the Cascadia Subduction Zone expected to cause?

• A minor earthquake

• The biggest earthquake in modern history

• A volcanic eruption

• A severe drought

Which fault line is more active but less powerful than the Cascadia Subduction Zone?

• Wasatch Fault Line

• Hayward Fault Line

• New Madrid Fault Line

• San Andreas Fault Line

What is the upper limit magnitude of the San Andreas Fault Line?

• 8.2

• 9.5

• 9.0

• 7.5

How long did the 1994 Los Angeles earthquake last?

• 5-6 minutes

• 3-4 minutes

• 1-2 minutes

• 10-20 seconds

What causes the buildup of pressure in the Cascadia Subduction Zone?

• The North American plate moving away from the Juan de Fuca plate

• The North American plate sliding over the Juan de Fuca plate

• The Juan de Fuca plate sliding under the North American plate

• The Pacific plate colliding with the North American plate

What is the estimated probability of a magnitude 9.0 earthquake occurring in the next 50 years?

• 6-9%

• 15-20%

• 1-5%

• 10-14%

What will be the first sign of the earthquake?

• A sudden drop in temperature

• A loud explosion

• A compression wave

• Continuous shaking

How long will the power be out west of the Cascade Mountain Range after the earthquake?

• A few hours

• A few days

• A few weeks

• A few months

How many people live in the inundation zone along the Pacific Northwest coast?

• 150,000

• 50,000

• 100,000

• 71,000

How long will it take to restore major highways along the I-5 corridor after the earthquake?

• 6 months to a year

• 1-3 months

• 1-2 years

• 2-3 years