Yellowstone supervolcano is fueled by crustal shifts, not a mantle plume
Updated
Updated · Livescience.com · May 2
Yellowstone supervolcano is fueled by crustal shifts, not a mantle plume
13 articles · Updated · Livescience.com · May 2
A Science study used a 3D model of western North America and Yellowstone’s lithosphere to show tectonic forces open pathways that draw magma upward beneath the caldera.
Researchers said competing crustal stretching and the sinking Farallon slab tilt Yellowstone’s plumbing system, potentially improving eruption forecasts and understanding of future volcanic behaviour.
Yellowstone has had three major eruptions in 2.1 million years, most recently 631,000 years ago, and scientists said the modelling could also help explain other hazardous caldera systems worldwide.
Yellowstone isn't being pushed up but pulled apart. Could this tectonic tearing awaken other supervolcanoes worldwide?
If shifting plates fuel Yellowstone's magma, could a major earthquake on the West Coast now trigger its eruption?
Yellowstone’s Supervolcano Unveiled: How Farallon Plate Tectonics Replace the Mantle Plume Theory
Overview
In April 2026, a landmark study by the Institute of Geology and Geophysics overturned the long-held mantle plume theory for Yellowstone, revealing that its volcanic activity is driven by magma generated in the shallow asthenosphere. This magma forms through decompression melting caused by lithospheric tearing, which results from horizontal mantle flow—called mantle wind—linked to the ancient subduction of the Farallon Plate. The tearing creates a southwest-dipping pathway that channels magma toward the caldera, feeding a widespread magma mush system with only 5–15% molten rock. This dynamic system is constantly recharged by fresh magma injections, shaping new monitoring and hazard strategies. The breakthrough challenges global supervolcano models and guides future research using advanced computational methods.