Understanding the Cascadia Subduction Zone and Earthquake Preparedness

What is the estimated chance of a major earthquake occurring in the Cascadia subduction zone within the next 50 years?

• 50%

• 37%

• 75%

• 10%

How does the potential magnitude of a Cascadia subduction zone earthquake compare to California's 1906 quake?

• It would be 10 times more powerful

• It would be 20 times more powerful

• It would be 45 times more powerful

• It would be 100 times more powerful

What was a significant factor in Japan's ability to withstand the 2011 earthquake?

• Lack of tall buildings

• Advanced earthquake preparedness

• Geographical location

• Smaller population density

What is the average frequency of subduction quakes in the Cascadia region over the last 10,000 years?

• Every 1000 years

• Every 500 years

• Every 250 years

• Every 100 years

What is a major concern for infrastructure in Portland and Seattle during a Cascadia earthquake?

• Flooding

• Volcanic eruptions

• Landslides

• Bridge collapse

What is a key challenge for communities like Seaside, Oregon, in the event of a tsunami?

• Limited access to food supplies

• Proximity to a volcano

• High population density

• Lack of evacuation routes

What is a common issue with many homes in the Pacific Northwest regarding earthquake preparedness?

• They are built on floodplains

• They are not bolted to their foundations

• They are made of flammable materials

• They lack proper insulation

What is one of the most important retrofitting measures for homes in earthquake-prone areas?

• Building a basement

• Installing solar panels

• Strengthening the connection from walls to floors and foundation

• Adding extra windows

What is a recommended item to have in your home for earthquake preparedness?

• A satellite phone

• A bicycle

• A two-bucket toilet system

• A generator

What is a crucial step to take if you smell gas after an earthquake?

• Leave the house immediately

• Open all windows

• Call the fire department

• Turn off the gas using a shutoff tool