The Great Alaskan Earthquake and Its Impact on Earthquake Science

The video discusses the 1964 Alaskan earthquake, the largest recorded in North America, and its impact on the development of earthquake science. It explains plate tectonics, subduction zones, and different types of faults. The video highlights the scientific advancements and institutions established post-earthquake to study seismic activity.

What was the magnitude of the Great Alaskan Earthquake of 1964?

• 9.5

• 8.5

• 9.2

• 7.8

Which type of plate boundary is formed when plates move apart?

• Divergent

• Subduction

• Transform

• Convergent

Who proposed the theory of plate tectonics?

• Alfred Wegener

• George Plafker

• Isaac Newton

• Charles Darwin

What is a mega thrust earthquake?

• An earthquake caused by volcanic activity

• An earthquake occurring at a transform boundary

• An earthquake caused by human activities

• An earthquake resulting from one plate sliding beneath another

Which plates were involved in the Great Alaskan Earthquake?

• Pacific and North American

• Indian and Australian

• South American and Antarctic

• Eurasian and African

What type of fault is responsible for creating mountain ranges?

• Transform fault

• Normal fault

• Reverse fault

• Strike-slip fault

Which fault is known for its strike-slip movement in California?

• San Andreas Fault

• Wasatch Fault

• New Madrid Fault

• Anatolian Fault

What is the main challenge in predicting earthquakes?

• Subtle processes occurring deep within the Earth

• Inaccurate historical data

• Unpredictable weather conditions

• Lack of technology

Which institution was established to monitor seismic activity after the 1964 earthquake?

• National Oceanic and Atmospheric Administration

• Federal Emergency Management Agency

• National Aeronautics and Space Administration

• US Geological Survey

Approximately how many detectable earthquakes occur worldwide each year?

• 1,000,000

• 500,000

• 100,000

• 50,000