The San Andreas Fault Line

The video discusses the San Andreas Fault, which runs through California and poses a significant earthquake risk to cities like Los Angeles. Despite quake-resistant designs, predicting large earthquakes remains challenging. The southern section of the fault has been inactive for over 300 years, increasing the likelihood of a major quake. Researchers use supercomputers to model fault line activity and predict future quakes. Historical data shows that a quake similar to the one in 1690 could cause significant damage today due to increased population density.

What makes cities like Los Angeles particularly vulnerable to earthquakes?

• Their proximity to the ocean

• Their location near the San Andreas Fault

• Their high population density

• Their lack of earthquake-resistant buildings

What is the expected movement of the Pacific and North American plates if they could slip freely?

• 1 centimeter per year

• 3 centimeters per year

• 5 centimeters per year

• 10 centimeters per year

Why is there a concern about a major earthquake in the southern section of the San Andreas Fault?

• Because of recent volcanic activity

• Because it has been over 300 years since the last major quake

• Because the area is heavily populated

• Because the fault is moving too quickly

What technology is being used to predict future earthquakes along the San Andreas Fault?

• Drones

• Satellite imagery

• Seismographs

• Supercomputers

What was the magnitude of the last major earthquake in the southern section of the San Andreas Fault?

• 9.1

• 8.0

• 7.7

• 6.5