Homework due Wed 24 Aug 05

1
Homework due Wed 24 Aug 05

• Briefly discuss the hazard and risk Natural
  Hazards pose to Puerto Rico, with focus on
  hazards from earthquakes.
• Explain why the Australian continent has few
  earthquakes.  However, note that there are very
  active earthquake zones near Australia.
• Compare the earthquake activity, volcanic
  activity and topography of the west and east
  coasts of South America.  Why are these
  continental margins so different?
• Stein p367 Problems1,2,3,5 (handout in class)
• Note Seismic moment M0 ?AD (dyne cm)
• rigidity of rock (assume 3x1011dyne/cm2)
• A area of fault slip
• D average displacement/slip over the area of
  fault slip
• Moment Magnitude Mw (log M0 / 1.5)
  - 10.73