Use data about the change in seafloor elevation from an active volcano in the North Pacific Ocean to look if there are patterns over time in terms of when eruptions occur.
Explore the data below to see what you can observe about how the seafloor changes height before, during, and after an eruption.
Use your cursor to draw your prediction on the graph of when the next eruption event occurred after 2012.
Are you ready to show the actual measured observations?
If you haven't made a prediction yet, please click "Cancel" and draw your prediction on the graph before showing the results.
When the site loads, you are able to see the changes in the elevation of the seafloor around the Axial Seamount from 1997-2012 above where magma often builds up just below the seafloor until enough pressure builds for a diking-eruption event. You can interact with the data by:
Zooming in and out of the data to look at different time scales that interest you by changing the width of the highlighted section of the bottom graph (it loads with all of the data highlighted).
Using your cursor to make a prediction of what the data look like from 2012-2016.
Selecting "Show Actual Observations" to compare your prediction against the actual change in seafloor data from 2012-2016.
Note - The "Estimated Threshold" is an estimation of the amount the seafloor rises (inflates) before which an eruptions follows.
Questions for Thought
Across what time periods are you able to observe changes in the seafloor data in this graph?
Across what range of seafloor elevation are you able to observe in this graph?
At what amount of change in seafloor elevation is the estimated threshold for when a diking-eruption will likely follow?
What changes or patterns did you observe in changes in seafloor elevation between 1997-2012 at the Axial Seamount?
When did you see these changes or patterns?
How did you use those changes or patterns from 1997-2012 to help make your prediction of when the next diking-eruption event could have occurred?
What questions do you still have about how we use data of change in seafloor depth over time to predict when the next diking-eruption event may occur?
Click on the images below to learn more about where and how the dataset above was collected.