Your Objective

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.

Data Tips

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:

Note - The "Estimated Threshold" is an estimation of the amount the seafloor rises (inflates) before which an eruptions follows.

Questions for Thought

Orientation Questions
  • 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?
Interpretation Questions
  • 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?

Background Information

Click on the images below to learn more about where and how the dataset above was collected.

Dataset Information

The data in this activity was provided by William Chadwick at NOAA PMEL, and was adapted from Figure 2 in: Nooner, S. L., and W. W. Chadwick, Jr. (2016), Inflation-predictable behavior and co-diking-eruption event deformation at Axial Seamount, Science, 354(6318), 1399-1403, doi:10.1126/science.aah4666.

Download this Dataset

The data for this activity was collected by the Central Caldera Bottom Pressure and Tilt instrument (RS03CCAL-MJ03F-05-BOTPTA301) on the Cabled Axial Seamount array.

To see the latest data from this instrument, you can check out Bottom Pressure and Tilt page at NOAA PMEL. They also provide a blog that chronicles past and future diking-eruption event forecasts at Axial Seamount.

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