Valdez Earthquake Impact and Causes

The transcript describes the 1964 Great Alaska Earthquake, detailing the initial experience, the geological causes involving plate tectonics and subduction, and the resulting impact, including tsunamis and structural damage. It highlights the fire outbreak and the profound effect on the community, leading to evacuations and long-term changes.

What natural phenomenon was described as a loud boom and rumble?

• A landslide

• A volcanic eruption

• An earthquake

• A thunderstorm

What causes the movement and collision of Earth's plates?

• Solar flares

• Tectonic activity

• Ocean tides

• Wind currents

Which plate was subducting under Alaska before the 1964 earthquake?

• Eurasian Plate

• Pacific Plate

• North American Plate

• Indian Plate

What was the magnitude of the Great Alaska Earthquake?

• 8.5

• 9.2

• 6.9

• 7.8

How high were the local tsunami waves generated by the earthquake?

• 40 feet

• 20 feet

• 10 feet

• 30 feet

What caused the fires in Valdez after the earthquake?

• A gas leak

• A forest fire

• An oil stove falling over

• A lightning strike

How much did the ground near the waterfront drop during the earthquake?

• 11 feet

• 5 feet

• 7 feet

• 9 feet

What was the maximum sideways shift of the ground in Valdez?

• 10 feet

• 40 feet

• 20 feet

• 30 feet

Who remained in Valdez after the earthquake?

• All residents

• Only maintenance personnel and a few others

• Emergency services

• Tourists

What was the long-term impact on the community of Valdez?

• Profound changes and some never returned

• No significant impact

• Complete destruction

• Immediate recovery