Earthquake Knowledge Assessment

The video explores E-Defense, the world's largest earthquake simulator in Japan, designed to test and improve building resistance to earthquakes. It discusses the 1995 Kobe earthquake, its unexpected impact, and the subsequent development of E-Defense. The video details the mechanics of the shake table, the experiments conducted, and the importance of retrofitting buildings. It also highlights the need for future earthquake preparedness and maintaining building functionality during seismic events.

What is the primary purpose of the E-Defense earthquake simulator?

• To simulate volcanic eruptions

• To predict future earthquakes

• To test the earthquake resistance of buildings

• To measure the speed of tectonic plates

What was the magnitude of the Kobe earthquake in 1995?

• 8.1

• 6.9

• 7.5

• 5.4

What was the main cause of fatalities during the Kobe earthquake?

• Tsunami

• Building collapse

• Fires

• Landslides

What is the weight of the shake table at E-Defense?

• 500 tons

• 800 tons

• 1000 tons

• 1200 tons

What is the role of hydraulic actuators in the E-Defense facility?

• To measure building height

• To move the shake table

• To simulate wind forces

• To record seismic data

How is the strength of an earthquake measured?

• Richter scale

• Magnitude scale

• Seismic scale

• Intensity scale

What is the significance of the magnitude scale being logarithmic?

• It measures time duration

• It indicates a tenfold increase in force

• It shows the depth of the earthquake

• It calculates the speed of tectonic plates

What percentage of new buildings in Kobe collapsed during the 1995 earthquake?

• 15%

• 0.3%

• 5%

• 10%

What is one of the future challenges for earthquake preparedness in Japan?

• Predicting the exact time of earthquakes

• Ensuring buildings remain functional after earthquakes

• Reducing the cost of construction

• Building taller skyscrapers

What is the expected magnitude of a future earthquake in the Tokai region?

• 9.0

• 6.5

• 8.0

• 7.0