Cascadia Earthquake: Key Facts and Implications

The video explores the potential devastation of a major earthquake along the Cascadia subduction zone, which could trigger a massive tsunami affecting the west coast of North America. Historical accounts, Indigenous myths, and scientific discoveries highlight the region's seismic activity. The video discusses the potential impact of such an event, including infrastructure collapse and widespread casualties, and the possibility of a linked San Andreas fault rupture.

What natural disaster is the Cascadia Megathrust Fault compared to in terms of potential devastation?

• Yellowstone supervolcano

• San Francisco earthquake

• Mount St. Helens eruption

• Hurricane Katrina

What was unusual about the 1700 tsunami that struck Japan?

• It was accompanied by a massive earthquake

• It came without any prior tremors

• It was predicted by ancient seers

• It occurred during a summer storm

Which Indigenous tribe's myth involves Thunderbird and Whale?

• Yurok

• Tolowa

• Makah

• Nuu-chah-nulth

What is the process called when one tectonic plate burrows under another?

• Subduction

• Convection

• Divergence

• Convergence

What magnitude could a full margin rupture of the Cascadia fault potentially reach?

• 8.0

• 9.2

• 8.6

• 10.0

What year did scientists finally piece together the last major Cascadia quake?

• 1984

• 1996

• 2000

• 2010

What is the estimated death toll if the Cascadia quake hits during a summer holiday?

• 71,000

• 200,000

• 27,000

• 13,000

What is the likelihood of a major Cascadia quake occurring in the next fifty years?

• 1 in 20

• 1 in 10

• 1 in 5

• 1 in 2

Which fault is connected to the Cascadia fault and could also rupture?

• New Madrid

• Garlock

• Hayward

• San Andreas

What should residents of the west coast of America consider doing, according to the video?

• Building earthquake-proof shelters

• Stockpiling food and water

• Moving to the east coast

• Living every day like it's their last