1. A magnitude 6 earthquake is associated with ____ times more ground shaking than a magnitude 4 earthquake. (give the number only, e.g. "65")
2. Historical evidence has shown that 9 earthquakes with a magnitude equal to or greater than 7 occurred in the Caribbean near Haiti during the past 110 years. What is the recurrence interval, in years, for magntude 7 earthquakes near Haiti? (provide your answer to the nearest whole number, e.g. "19")
3. Using the given recurrence inteverals for a magnitude 6 earthquake, order the following sites from 1=most to 4=least tectonically active.
Question 4 options:
Site 4 - Recurrence Interval = 6 years
Site 2 - Recurrence Interval = 45 years
Site 1 - Recurrence Interval = 60 years
Site 3 - Recurrence Interval = 18 years