1) Post your answers to these problems: What causes earthquakes? Of the given factors, which do you think is the most reliable predictor of earthquakes? Describe your answer please.
a) Recurrence interval
b) Animal behavior
c) Rock precursors
2) Post your answer to this problem: Compare and contrast the use of the Mercalli scale and the Richter scale to measure the size of the earthquake. What are the merits and demerits of using each scale?