Crustal seismic velocity responds to a magmatic intrusion and seasonal loading in Iceland's Northern Volcanic Zone
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 oft...
Main Authors: | , , , |
---|---|
Format: | Text |
Language: | English |
Published: |
2019
|
Subjects: | |
Online Access: | https://www.documentation.ird.fr/hor/fdi:010077418 |
id |
ftird:oai:ird.fr:fdi:010077418 |
---|---|
record_format |
openpolar |
spelling |
ftird:oai:ird.fr:fdi:010077418 2024-09-15T18:13:57+00:00 Crustal seismic velocity responds to a magmatic intrusion and seasonal loading in Iceland's Northern Volcanic Zone Donaldson, C. Winder, T. /Caudron, Corentin White, R. S. ISLANDE 2019 https://www.documentation.ird.fr/hor/fdi:010077418 EN eng https://www.documentation.ird.fr/hor/fdi:010077418 oai:ird.fr:fdi:010077418 Donaldson C., Winder T., Caudron Corentin, White R. S. Crustal seismic velocity responds to a magmatic intrusion and seasonal loading in Iceland's Northern Volcanic Zone. 2019, 5 (11), p. eaax6642 [13 p.] text 2019 ftird 2024-08-15T05:57:41Z 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 Baroarbunga-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. Text Iceland Islande IRD (Institute de recherche pour le développement): Horizon |
institution |
Open Polar |
collection |
IRD (Institute de recherche pour le développement): Horizon |
op_collection_id |
ftird |
language |
English |
description |
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 Baroarbunga-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. |
format |
Text |
author |
Donaldson, C. Winder, T. /Caudron, Corentin White, R. S. |
spellingShingle |
Donaldson, C. Winder, T. /Caudron, Corentin White, R. S. Crustal seismic velocity responds to a magmatic intrusion and seasonal loading in Iceland's Northern Volcanic Zone |
author_facet |
Donaldson, C. Winder, T. /Caudron, Corentin White, R. S. |
author_sort |
Donaldson, C. |
title |
Crustal seismic velocity responds to a magmatic intrusion and seasonal loading in Iceland's Northern Volcanic Zone |
title_short |
Crustal seismic velocity responds to a magmatic intrusion and seasonal loading in Iceland's Northern Volcanic Zone |
title_full |
Crustal seismic velocity responds to a magmatic intrusion and seasonal loading in Iceland's Northern Volcanic Zone |
title_fullStr |
Crustal seismic velocity responds to a magmatic intrusion and seasonal loading in Iceland's Northern Volcanic Zone |
title_full_unstemmed |
Crustal seismic velocity responds to a magmatic intrusion and seasonal loading in Iceland's Northern Volcanic Zone |
title_sort |
crustal seismic velocity responds to a magmatic intrusion and seasonal loading in iceland's northern volcanic zone |
publishDate |
2019 |
url |
https://www.documentation.ird.fr/hor/fdi:010077418 |
op_coverage |
ISLANDE |
genre |
Iceland Islande |
genre_facet |
Iceland Islande |
op_relation |
https://www.documentation.ird.fr/hor/fdi:010077418 oai:ird.fr:fdi:010077418 Donaldson C., Winder T., Caudron Corentin, White R. S. Crustal seismic velocity responds to a magmatic intrusion and seasonal loading in Iceland's Northern Volcanic Zone. 2019, 5 (11), p. eaax6642 [13 p.] |
_version_ |
1810451732805713920 |