35.12. Case Studies of Recorded PGA in Major Earthquakes

Try these first

1. 1.

   What does PGA stand for?

   Hint

   Remember it relates to measuring earthquake shaking.

2. 2.

   Name one earthquake discussed in class.

   Hint

   Think about the ones we mentioned with recorded PGAs.

3. 3.

   What is the recorded PGA during the Northridge earthquake?

   • 0.35g
   • 0.91g
   • 0.84g

   Hint

   Think about the maximum ground shaking we discussed.

4. 4.

   True or False: A PGA of 0.25g is considered low.

   • True
   • False

   Hint

   Consider how different PGAs are categorized based on potential damage.

5. 5.

   Calculate the potential damage to a structure designed for a PGA of 0.25g when subjected to a 0.91g PGA.

   Hint

   Consider the ratio of the two PGAs.

6. 6.

   Discuss how PGA values could influence urban planning and the placement of critical infrastructure in seismic zones.

   Hint

   Think about how historical data can forecast future risks.