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What lies beneath Yellowstone?

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Volcanic magma reservoirs are larger than previously thought. However, this increased magma volume may not lead to more volcanic eruptions.

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Area of Science:

  • Geology
  • Volcanology
  • Earth Science

Background:

  • Magma accumulation beneath volcanoes is a key factor in eruption forecasting.
  • Previous estimates of magma volume may have underestimated the total amount present.

Purpose of the Study:

  • To reassess the volume of magma present in volcanic systems.
  • To determine the eruptibility of the newly recognized magma volumes.

Main Methods:

  • Geophysical surveys to detect subsurface magma.
  • Petrological analysis of volcanic rocks to understand magma properties.

Main Results:

  • Substantial volumes of magma, exceeding prior estimations, have been identified.
  • The identified magma exhibits characteristics that may inhibit its ascent and eruption.

Conclusions:

  • Volcanic systems may host larger magma reservoirs than currently recognized.
  • Increased magma volume does not automatically equate to a higher probability of eruption due to factors influencing magma mobility and composition.