37.11.1. Niigata Earthquake, Japan (1964)

Try these first

1. 1.

   What is liquefaction?

   Hint

   Think about what happens when shaking occurs in wet soils.

2. 2.

   During the Niigata earthquake, which type of soil was primarily affected?

   Hint

   Consider the properties of soil types that are more prone to instability.

3. 3.

   What phenomenon occurs when saturated soil loses strength during an earthquake?

   • Earthquake Shaking
   • Liquefaction
   • Ground Settlement

   Hint

   Remember the term we discussed regarding soil behavior.

4. 4.

   True or False: Sand boils are a sign of liquefaction.

   • True
   • False

   Hint

   Consider what happens when pressure builds underground.

5. 5.

   Using the Niigata earthquake as a case study, create a comprehensive report detailing how liquefaction affected the urban landscape and the subsequent engineering solutions devised.

   Hint

   Think about the engineering literature and how recovery efforts were structured.

6. 6.

   Develop a risk assessment model for a city prone to liquefaction during earthquakes, considering soil types, groundwater levels, and building codes.

   Hint

   Use GIS tools and historical datasets to inform your assessment.