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Magmatic connectivity among six Galápagos volcanoes revealed by satellite geodesy

Author

Listed:
  • Eoin Reddin

    (University of Leeds)

  • Susanna K. Ebmeier

    (University of Leeds)

  • Eleonora Rivalta

    (University of Bologna
    GFZ German Research Centre for Geosciences)

  • Marco Bagnardi

    (NASA Goddard Space Flight Center
    U.S. Geological Survey, Volcano Science Center)

  • Scott Baker

    (BOS Technologies LLC)

  • Andrew F. Bell

    (University of Edinburgh)

  • Patricia Mothes

    (Instituto Geofísico de la Escuela Politécnica Nacional)

  • Santiago Aguaiza

    (Instituto Geofísico de la Escuela Politécnica Nacional)

Abstract

Shallow magmatic reservoirs that produce measurable volcanic surface deformation are often considered as discrete independent systems. However, petrological analyses of erupted products suggest that these may be the shallowest expression of extensive, heterogeneous magmatic systems that we show may be interconnected. We analyse time series of satellite-radar-measured displacements at Western Galápagos volcanoes from 2017 to 2022 and revisit historical displacements. We demonstrate that these volcanoes consistently experience correlated displacements during periods of heightened magma supply to the shallow crust. We rule out changes in static stress, shallow hydraulic connections, and data processing and analysis artefacts. We propose that episodic surges of magma into interconnected magmatic systems affect neighbouring volcanoes, simultaneously causing correlations in volcanic uplift and subsidence. While expected to occur globally, such processes are uniquely observable at the dense cluster of Western Galápagos volcanoes, thanks to the high rate of surface displacements and the wealth of geodetic measurements.

Suggested Citation

  • Eoin Reddin & Susanna K. Ebmeier & Eleonora Rivalta & Marco Bagnardi & Scott Baker & Andrew F. Bell & Patricia Mothes & Santiago Aguaiza, 2023. "Magmatic connectivity among six Galápagos volcanoes revealed by satellite geodesy," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-42157-x
    DOI: 10.1038/s41467-023-42157-x
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    References listed on IDEAS

    as
    1. Andrew F. Bell & Peter C. La Femina & Mario Ruiz & Falk Amelung & Marco Bagnardi & Christopher J. Bean & Benjamin Bernard & Cynthia Ebinger & Matthew Gleeson & James Grannell & Stephen Hernandez & Mac, 2021. "Caldera resurgence during the 2018 eruption of Sierra Negra volcano, Galápagos Islands," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
    2. Michael J. Stock & Dennis Geist & David A. Neave & Matthew L. M. Gleeson & Benjamin Bernard & Keith A. Howard & Iris Buisman & John Maclennan, 2020. "Cryptic evolved melts beneath monotonous basaltic shield volcanoes in the Galápagos Archipelago," Nature Communications, Nature, vol. 11(1), pages 1-13, December.
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    Cited by:

    1. A. Rosa & C. Pagli & H. Wang & F. Sigmundsson & V. Pinel & D. Keir, 2024. "Simultaneous rift-scale inflation of a deep crustal sill network in Afar, East Africa," Nature Communications, Nature, vol. 15(1), pages 1-8, December.

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