28.2.3. Other Magnitude Scales

Try these first

1. 1.

   What does the Body Wave Magnitude (Mb) scale measure?

   Hint

   Think about which waves are the fastest.

2. 2.

   Which type of magnitude scale focuses on surface waves?

   Hint

   Consider which waves travel along the surface.

3. 3.

   What does the Body Wave Magnitude scale primarily measure?

   • P-wave amplitude
   • S-wave duration
   • Surface wave frequency

   Hint

   Focus on which type of wave is involved.

4. 4.

   True or False: Surface Wave Magnitude is used primarily for small earthquakes.

   • True
   • False

   Hint

   Consider the type of damage caused by larger earthquakes.

5. 5.

   If an earthquake has a Body Wave Magnitude of 6.0 measured far from the source, but close stations report Surface Wave Magnitude of 7.0. Discuss how the different scales help in understanding the event.

   Hint

   Think about the range and applications of each scale.

6. 6.

   Design a theoretical scenario where an earthquake measures differently across various magnitude scales. What implications would this have for emergency plans?

   Hint

   Focus on planning for the most damaging effects.