Thermo-Hydro-Mechanical Model and Caprock Deformation Explain the Onset of an Ongoing Seismo-Volcanic Unrest

Publikationstyp:
Zeitschriftenaufsatz
Metadaten:
Autoren
  • Waheed Gbenga Akande
  • Quan Gan
  • David G Cornwell
  • Luca De Siena
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000638091600065&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.1029/2020JB020449
eISSN
2169-9356
Externe Identifier
  • Clarivate Analytics Document Solution ID: RK1VR
ISSN
2169-9313
Ausgabe der Veröffentlichung
3
Zeitschrift
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
Schlüsselwörter
  • Campi Flegrei caldera
  • caprock deformation
  • induced seismicity
  • thermo&#8208
  • hydro&#8208
  • mechanical modeling
  • volcano seismicity
Artikelnummer
ARTN e2020JB020449
Datum der Veröffentlichung
2021
Status
Published
Titel
Thermo-Hydro-Mechanical Model and Caprock Deformation Explain the Onset of an Ongoing Seismo-Volcanic Unrest
Sub types
  • Article
Ausgabe der Zeitschrift
126

Datenquelle: Web of Science (Lite)

Andere Metadatenquellen:
Abstract
<jats:title>Abstract</jats:title><jats:p>Modeling seismicity at volcanoes remains challenging as the processes that control seismic energy release due to fluid transport, heat flow, and rock deformation are firmly coupled in complex geological media. Here, we couple fluid‐flow and mechanical (deformation) simulators (TOUGHREACT–FLAC<jats:sup>3D</jats:sup>) to reproduce fluid‐induced seismicity at Campi Flegrei caldera (southern Italy) in isothermal (HM) and nonisothermal (THM) conditions. The unique ability of the Campi Flegrei caprock to withstand stress induced by hot‐water injections is included in the model parametrization. After pore pressure accumulation is guided by a combination of thermal and hydromechanical interactions, contrasting compressive and extensional forces act on the basal and top parts of the caprock, respectively. Then, pressure perturbation and caprock deformation induce fractures that allow hot fluids uprising to pressurize the overlying fault, driving it toward failure and triggering seismicity. Under similar mechanical boundary conditions, the induced thermal effects prompt seismic slip earlier but with higher seismic magnitudes when (1) thermal equilibrium is preserved and (2) the thermal contrast is enhanced due to increased fluid injection temperatures. The results indicate that numerical models of volcano seismicity must consider the influence of rock‐sealing formations to obtain more robust, accurate, and realistic seismic predictions at volcanoes. The proposed models satisfactorily reproduce the magnitude–depth distribution of the swarm (October 5, 2019), preceding the two strongest earthquakes recorded in 35 years at the caldera (3.1 and 3.3—on December 6, 2019, and April 26, 2020, respectively) using hot‐water injection from depth.</jats:p>
Autoren
  • Waheed Gbenga Akande
  • Quan Gan
  • David G Cornwell
  • Luca De Siena
DOI
10.1029/2020jb020449
eISSN
2169-9356
ISSN
2169-9313
Ausgabe der Veröffentlichung
3
Zeitschrift
Journal of Geophysical Research: Solid Earth
Sprache
en
Online publication date
2021
Datum der Veröffentlichung
2021
Status
Published
Herausgeber
American Geophysical Union (AGU)
Herausgeber URL
http://dx.doi.org/10.1029/2020jb020449
Datum der Datenerfassung
2023
Titel
Thermo‐Hydro‐Mechanical Model and Caprock Deformation Explain the Onset of an Ongoing Seismo‐Volcanic Unrest
Ausgabe der Zeitschrift
126

Datenquelle: Crossref

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