Question

求高手解答！！！！

1. The Pinnacles and Neenach volcanics are 23.5 million year old andesite to rhyolite outcrops, on either side of the San Andreas Fault, today separated by ~320 kilometers. If they were originally products of the same eruptive center, they have been offset along the San Andreas Fault by 320 kilometers in 23.5 million years. What is the rate of offset in centimeters per year?
2. The maximum horizontal offset recorded anywhere along the San Andreas Fault after the 1906 earthquake was ~6 meters. If there has been cumulative offset along the fault of 320 kilometers, estimate how many earthquakes have occurred during that period? If 6 meters is taken as the maximum offset, would your answer represent a maximum or minimum estimate?
3. What would the recurrence interval be if your estimate were accurate? Give your answer in years between earthquakes, or yrs/eq.

Answer 1

简单说下吧，
1，圣安德列斯断层中两个存在了2350万年的火山现在相距320公里，如果他们当年是同一次喷发形成的，那么他们在这2350万年里相对偏移了320公里。每年他们相对偏移多少厘米？
2，1906年之后的所有地震中有记录的最大单次偏移是6米，如果这320公里的偏移都是地震累积造成的，那么估计一下造成320公里的这段时间里一共发生了多少次地震？如果6米是最大单次偏移，那么你估算的地震数是可能的最大数量还是最小数量？
3，如果你的估算是准确的，那么这段时间里发生地震的频率是多少？请回答每多少年一次地震。或者 年/震。