Donaldson, Clare and Winder, Tom and Caudron, Corentin and White, Robert S. (2019) Crustal seismic velocity responds to a magmatic intrusion and seasonal loading in Iceland's Northern Volcanic Zone. Science Advances, 5 (11). ISSN 2375-2548 DOI https://doi.org/10.1126/sciadv.aax6642
Full text not available from this repository. (Request a copy)Abstract
Seismic noise interferometry is an exciting technique for studying volcanoes, providing a continuous measurement of seismic velocity changes (dv/v), which are sensitive to magmatic processes that affect the surrounding crust. However, understanding the exact mechanisms causing changes in dv/v is often difficult. We present dv/v measurements over 10 years in central Iceland, measured using single-station cross-component correlation functions from 51 instruments across a range of frequency bands. We observe a linear correlation between changes in dv/v and volumetric strain at stations in regions of both compression and dilatation associated with the 2014 Bárðarbunga-Holuhraun dike intrusion. Furthermore, a clear seasonal cycle in dv/v is modeled as resulting from elastic and poroelastic responses to changing snow thickness, atmospheric pressure, and groundwater level. This study comprehensively explains variations in dv/v arising from diverse crustal stresses and highlights the importance of deformation modeling when interpreting dv/v, with implications for volcano and environmental monitoring worldwide.
Item Type: | Article |
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Uncontrolled Keywords: | 2019AREP, IA75 |
Subjects: | 02 - Geodynamics, Geophysics and Tectonics |
Divisions: | 02 - Geodynamics, Geophysics and Tectonics 12 - PhD 07 - Gold Open Access |
Journal or Publication Title: | Science Advances |
Volume: | 5 |
Identification Number: | https://doi.org/10.1126/sciadv.aax6642 |
Depositing User: | Sarah Humbert |
Date Deposited: | 30 Jul 2019 09:43 |
Last Modified: | 12 Dec 2019 18:09 |
URI: | http://eprints.esc.cam.ac.uk/id/eprint/4513 |
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