The 2015 Wolf volcano (Galápagos) eruption studied using Sentinel-1 and ALOS-2 data

Handle URI:
http://hdl.handle.net/10754/621176
Title:
The 2015 Wolf volcano (Galápagos) eruption studied using Sentinel-1 and ALOS-2 data
Authors:
Xu, Wenbin ( 0000-0001-7294-8229 ) ; Jonsson, Sigurjon ( 0000-0001-5378-7079 ) ; Ruch, Joel; Aoki, Yosuke
Abstract:
An energetic eruption started on 25 May 2015 from a circumferential fissure at the summit of Wolf volcano on Isabela Island, western Galápagos. Further eruptive activity within the Wolf caldera followed in mid-June 2015. As no geodetic observations of earlier eruptions at Wolf exist, this eruption provides an opportunity to study the volcano's magmatic plumbing system for the first time. Here we use interferometric synthetic aperture radar (InSAR) data from both the Sentinel-1A and ALOS-2 satellites to map and analyze the surface deformation at four time periods during the activity. These data allow us to identify the two eruption phases and reveal strong coeruptive subsidence within the Wolf caldera that is superimposed on a larger volcano-wide subsidence signal. Modeling of the surface displacements shows that two shallow magma reservoirs located under Wolf at ~1 km and ~5 km below sea level explain the subsidence and that these reservoirs appear to be hydraulically connected. We also suggest that the transition from the circumferential to the intracaldera eruption may have involved ring fault activity.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Xu W, Jónsson S, Ruch J, Aoki Y (2016) The 2015 Wolf volcano (Galápagos) eruption studied using Sentinel-1 and ALOS-2 data. Geophysical Research Letters 43: 9573–9580. Available: http://dx.doi.org/10.1002/2016GL069820.
Publisher:
Wiley-Blackwell
Journal:
Geophysical Research Letters
Issue Date:
28-Sep-2016
DOI:
10.1002/2016GL069820
Type:
Article
ISSN:
0094-8276
Sponsors:
We thank Paul Segall (Stanford University), Charles Williams (GNS Science), and Geoff Wadge (University of Reading) for sharing the topography-correction codes. We also thank Renier Viltres (KAUST), Fabio Corbi (GFZ Potsdam), Eleonora Rivalta (GFZ Potsdam), Valerie Cayol (CNRS), Benjamin Bernard (IGEPN), and Patricio Ramon (IGEPN) for useful discussions. We used Generic Mapping Tools (GMT) to prepare Figure 1. The ALOS-2 data were provided by JAXA and the Sentinel-1A data by ESA/Copernicus. The research reported in this publication was supported by King Abdullah University of Science and Technology (KAUST).
Additional Links:
http://onlinelibrary.wiley.com/doi/10.1002/2016GL069820/abstract
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorXu, Wenbinen
dc.contributor.authorJonsson, Sigurjonen
dc.contributor.authorRuch, Joelen
dc.contributor.authorAoki, Yosukeen
dc.date.accessioned2016-10-24T13:46:35Z-
dc.date.available2016-10-24T13:46:35Z-
dc.date.issued2016-09-28en
dc.identifier.citationXu W, Jónsson S, Ruch J, Aoki Y (2016) The 2015 Wolf volcano (Galápagos) eruption studied using Sentinel-1 and ALOS-2 data. Geophysical Research Letters 43: 9573–9580. Available: http://dx.doi.org/10.1002/2016GL069820.en
dc.identifier.issn0094-8276en
dc.identifier.doi10.1002/2016GL069820en
dc.identifier.urihttp://hdl.handle.net/10754/621176-
dc.description.abstractAn energetic eruption started on 25 May 2015 from a circumferential fissure at the summit of Wolf volcano on Isabela Island, western Galápagos. Further eruptive activity within the Wolf caldera followed in mid-June 2015. As no geodetic observations of earlier eruptions at Wolf exist, this eruption provides an opportunity to study the volcano's magmatic plumbing system for the first time. Here we use interferometric synthetic aperture radar (InSAR) data from both the Sentinel-1A and ALOS-2 satellites to map and analyze the surface deformation at four time periods during the activity. These data allow us to identify the two eruption phases and reveal strong coeruptive subsidence within the Wolf caldera that is superimposed on a larger volcano-wide subsidence signal. Modeling of the surface displacements shows that two shallow magma reservoirs located under Wolf at ~1 km and ~5 km below sea level explain the subsidence and that these reservoirs appear to be hydraulically connected. We also suggest that the transition from the circumferential to the intracaldera eruption may have involved ring fault activity.en
dc.description.sponsorshipWe thank Paul Segall (Stanford University), Charles Williams (GNS Science), and Geoff Wadge (University of Reading) for sharing the topography-correction codes. We also thank Renier Viltres (KAUST), Fabio Corbi (GFZ Potsdam), Eleonora Rivalta (GFZ Potsdam), Valerie Cayol (CNRS), Benjamin Bernard (IGEPN), and Patricio Ramon (IGEPN) for useful discussions. We used Generic Mapping Tools (GMT) to prepare Figure 1. The ALOS-2 data were provided by JAXA and the Sentinel-1A data by ESA/Copernicus. The research reported in this publication was supported by King Abdullah University of Science and Technology (KAUST).en
dc.publisherWiley-Blackwellen
dc.relation.urlhttp://onlinelibrary.wiley.com/doi/10.1002/2016GL069820/abstracten
dc.rightsCopyright (2016) American Geophysical Union. Further reproduction or electronic distribution is not permitted.”en
dc.subjectGalápagos Islandsen
dc.subjectInSARen
dc.subjectSillen
dc.subjectVolcanic eruptionen
dc.titleThe 2015 Wolf volcano (Galápagos) eruption studied using Sentinel-1 and ALOS-2 dataen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalGeophysical Research Lettersen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionDepartment of Earth and Planetary Sciences, University of California, Berkeley, California, USAen
dc.contributor.institutionDepartment of Land Surveying and Geoinformaticsen
dc.contributor.institutionEarthquake Research Institute, University of Tokyo, Tokyo, Japanen
kaust.authorXu, Wenbinen
kaust.authorJonsson, Sigurjonen
kaust.authorRuch, Joelen
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