Magmatic Drivers of Eruption

What controls the location of volcanoes and the occurrence of eruptions?

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Recent seismic and magnetotelluric imaging studies have identified regions of melt and fluid in the mantle wedge that underlie subduction-generated volcanoes. At the same time, magma pathways in the crust have been observed “lighting up” with increases in seismic events between, prior to, and during eruptions, and some magma storage regions “breathe” geodetically between eruptions. New evidence has emerged from petrologic and geochemical studies documenting timescales of magma assembly, transport and run-up to eruption.


Despite these myriad observations of magma on the move, connections between the mantle melting region, the crustal magmatic system and eruption dynamics are poorly understood. We currently have no unifying models that allow us to understand the connections among magma generation, storage, transport, and eruption from the hydration of the mantle wedge above the subducting slab to the volcano at the surface. By considering the mantle melting region and tectonic setting as parts of the volcanic system, SZ4D will provide a fundamentally new way to interrogate and develop long-term forecasts of volcanic system behavior.

Working Group Members

Pete Barry

Ben Black

Claire Bucholz

Helge Gonnermann

Trish Gregg

*Matt Haney

Chris Huber

Shaul Hurwitz

Adam Kent
Eric Kiser
Pete LaFemina

Yves Moussallam

*Diana Roman

*Christy Till

Rick Wessels

Heather Wright




Rice, MCS RCN Liaison
U. Illinois




Oregon State
U. Arizona
Penn State


Arizona State U.



* Steering Committee Member

Potential SZ4D Magmatic Drivers of Eruption Target Hypotheses

June 2020 Webinar
Planning for the SZ4D Initiative: Meet the Magmatic Drivers of Eruption Working Group

Restless Volcanoes Spreadsheet

Interest Group Contacts:

Diana Roman -

Terry Plank -