Understanding Earthquakes and Seismic Activity

What is 'The Big One' in the context of California's seismic activity?

• A massive tsunami anticipated on the California coast

• A large volcanic eruption expected in California

• A significant landslide predicted in the Sierra Nevada

• A major earthquake predicted along the San Andreas Fault

Which region is known as the 'Ring of Fire'?

• The Pacific Ocean

• The Atlantic Ocean

• The Indian Ocean

• The Arctic Ocean

What is the primary fault line responsible for California's earthquakes?

• The Elenor Fault

• The Hayward Fault

• The Garlock Fault

• The San Andreas Fault

Which earthquake is considered one of the most significant in US history?

• The 1960 Valdivia earthquake

• The 2011 Tohoku earthquake

• The 1906 San Francisco earthquake

• The 2015 Gorkha earthquake

What was the magnitude of the 1964 Good Friday earthquake in Alaska?

• 9.5

• 9.2

• 8.7

• 7.9

What is one potential factor influencing the delay of 'The Big One'?

• The drying up of the Salton Sea

• A decrease in tectonic plate movement

• A rise in sea levels

• Increased volcanic activity

How might human activities influence seismic activity in Southern California?

• By stabilizing tectonic plates

• By causing more frequent tsunamis

• By altering stress conditions through resource extraction

• By increasing volcanic eruptions

What is the process called when the Earth's crust adjusts to the removal of large amounts of water?

• Tectonic shift

• Seismic creep

• Postglacial rebound

• Plate divergence

What is a 'slow earthquake'?

• A minor earthquake that is barely felt

• An earthquake that occurs underwater

• A seismic event that releases stress gradually

• An earthquake that occurs over a long period without causing damage

What is the significance of the Ridgecrest earthquakes in 2019?

• They were the first earthquakes recorded in the Eastern California Shear Zone

• They caused a major tsunami on the California coast

• They may have influenced the timing of 'The Big One'

• They were the largest earthquakes in California's history