Shaky situation
How often does the U.S. Geological Survey’s website update with info on recent earthquakes? Is it every … A.) 2.5 minutes, B.) 8 minutes, C.) 20 minutes or D.) 60 minutes?
The answer: A.) 2.5 minutes, B.) 8 minutes and C.) 20 minutes. In California, there are so many seismology sensors, it takes just 2.5 minutes to register and update on the USGS website. In the rest of the U.S., it takes 8 minutes; worldwide, it takes 20 minutes.