Project

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Groundwater response to volcanic unrest

Applicant Hautmann Stefanie
Number 158309
Funding scheme Marie Heim-Voegtlin grants
Research institution Institut für Geochemie und Petrologie ETH Zürich
Institution of higher education ETH Zurich - ETHZ
Main discipline Geophysics
Start/End 01.02.2015 - 31.01.2017
Approved amount 253'244.00
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All Disciplines (2)

Discipline
Geophysics
Other disciplines of Earth Sciences

Keywords (4)

Volcanology; Groundwater; Fluid Flow; Gravity

Lay Summary (German)

Lead
Geophysikalische Überwachungsmessungen an aktiven Vulkanen dienen der Abschätzung von magmatischen Prozessen in der Erdkruste und der Prognostizierbarkeit bevorstehender Eruptionen. Aufgenommene Signale (z.B. Schweredaten) werden bisher jedoch ausschliesslich auf Magma-Migration zurückgeführt, d.h. die Verfälschung magmatisch bedingter Signale durch sekundär induzierte Prozesse ist nicht berücksichtigt. Neue Messungen belegen, dass lokale Stressfeldänderungen in Folge von Schwankungen im Eruptionsverhalten eines aktiven Vulkans Oszillationen im lokalen Grundwassersystem bewirken können, welche ebenfalls geophysikalische Signale erzeugen. Die zu Grunde liegenden physikalischen Prozesse sowie die daraus resultierende Verzerrung von vulkanisch-geophysikalischen Messdaten sind jedoch bislang unbekannt.
Lay summary

Inhalt und Ziel des Forschungsprojekts

Das Projekt soll auf Grundlage von Computersimulationen Grundwasserspiegelschwankungen untersuchen, die durch magmatische Aktivität in der Erdkruste bedingt sind, sowie deren Einfluss auf geophysikalische Überwachungsdaten von aktiven Vulkanen identifizieren und quantifizieren. Ergebnisse der theoretischen Modellierungen werden anschliessend mit bereits vorliegenden vulkanischen und hydrologischen Überwachungsdaten von drei Regionen [Soufrière Hills Volcano (Montserrat, W.I.), Mayon (Philippinen), Nisyros (Griechenland)] abgeglichen und die Daten re-interpretiert.

Wissenschaftlicher und gesellschaftlicher Kontext des Forschungsprojekts

Die Ergebnisse der Studie sollen es ermöglichen, vulkanisch-geophysikalische Monitoringdaten von hydrologischen Einflüssen zu bereinigen und somit zu einer besseren Interpretation vulkanischer Daten in Bezug auf magmatische Prozesse führen. Die Studie trägt dadurch zum besseren Verständnis vulkanischer Systeme, deren Gefahrenbewertung und der Vorhersagbarkeit vulkanischer Aktivität bei. Gleichzeitig sind die Resultate von Bedeutung für die Grundwasserversorgung der Bevölkerung in geographisch isolierten vulkanischen Gebieten.

Direct link to Lay Summary Last update: 16.12.2014

Responsible applicant and co-applicants

Name Institute

Employees

Name Institute

Publications

Publication
Resonance oscillations of the Soufrière Hills Volcano (Montserrat,W.I.) magmatic system induced by forcedmagma flow from the reservoir into the upper plumbing dike
Chen Chin-Wu, Huang Hsin-Fu, Hautmann Stefanie, Sacks I. Selwyn, Linde Alan T., Taira Taka'aki (2017), Resonance oscillations of the Soufrière Hills Volcano (Montserrat,W.I.) magmatic system induced by forcedmagma flow from the reservoir into the upper plumbing dike, in Journal of Volcanology and Geothermal Research, 350, 7-17.
Magma buoyancy and volatile ascent driving autocyclic eruptivity at Hekla Volcano (Iceland)
Hautmann Stefanie, Sacks I. Selwyn, Linde Alan T., Roberts Matthew J. (2017), Magma buoyancy and volatile ascent driving autocyclic eruptivity at Hekla Volcano (Iceland), in Geochemistry, Geophysics, Geosystems, 18, 1-13.
Ground deformation and gravity changes of the Kos-Nisyros volcanic system between 1995 and 2008
Hautmann Stefanie, Gottsmann Joachim, Ground deformation and gravity changes of the Kos-Nisyros volcanic system between 1995 and 2008, in Dietrich Volker (ed.).

Collaboration

Group / person Country
Types of collaboration
Montserrat Volcano Observatory Montserrat (South America)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Department of Terrestrial Magnetism, Carnegie Institution for Science United States of America (North America)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
Universidad Complutense Madrid Spain (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Department of Earth Sciences, University of Bristol Great Britain and Northern Ireland (Europe)
- Research Infrastructure

Scientific events



Self-organised

Title Date Place

Communication with the public

Communication Title Media Place Year
Media relations: print media, online media Interactions between active volcanic systems and aquifers National Geographic (Material provided at request to NG, publication year/media not yet announced) International 2016

Awards

Title Year
Wollaston Fund 2015 of the Geological Society of London 2015

Abstract

Subsurface magmatic processes lead to quantifiable geophysical signals that are recorded at the surface to assess a volcano's activity state. However, magmatically-induced stress changes in the upper crust can trigger groundwater flow in the vicinity of active volcanoes that can bias geophysical signals recorded at the surface. To date, the relationship between hydrological and volcanic activity is widely unexplored and to what extent perturbations in the hydrological system (e.g., changes in groundwater level) impact geophysical monitoring data from active volcanoes remains a key unanswered question. The proposed project aims to investigate and quantify groundwater dynamics and their associated geophysical signals in response to changes in an active magmatic system.By means of theoretical computational simulations, forced groundwater transport away from and towards a pressure source will be explored, in order to establish a conceptual and quantifiable theoretical model on subsurface fluid flow in response to magmatic stress changes and their controlling parameters. Computational models will be run accounting for both porous and fractured flow mediums. Multi-parametric field data from three active volcanic settings [Soufrière Hills Volcano (Montserrat, W.I.), Mayon (Philippines) and Nisyros (Greece)] will then be applied to the hydrogeophysical models in order to benchmark predicted model results and to interpret and quantify recorded data for hydrologic/magmatic source mechanisms. The research will combine for the first time geophysical with hydrological (groundwater level, well discharge) data and volcanic (magma extrusion, volcanic explosions) observations.The results will enable (i) the interpretation and quantification of the geophysical records from three volcanic settings, (ii) the discrimination of hydrological vs. magmatic processes in the recorded signals, and (iii) the development of conceptual physical models of volcanic-hydrological interactions to ultimately understand how changes in one system impact the other. Outcomes will help improve the interpretation of volcanic monitoring data in terms of eruption forecasting and contribute to helping ensure availability and security of the water supply in volcanic regions.
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