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Graphs of the Number of Earthquakes Per Year at Yellowstone

The plots below represent a years worth of earthquake activity at Yellowstone. They show the number of earthquakes per day versus time. The maximum value of both the left and right y-axes change depending on the number of events for that year. The red line shows the cumulative number of earthquakes and corresponds to the number on the right-side y-axis. Click on the graph to see a larger image.