Unrest at Domuyo Volcano, Argentina, Detected by Geophysical and Geodetic Data and Morphometric Analysis
New volcanic unrest has been detected in the Domuyo Volcanic Center (DVC), to the east of the Andes Southern Volcanic Zone in Argentina. To better understand this activity, we investigated new seismic monitoring data, gravimetric and magnetic campaign data, and interferometric synthetic aperture rad...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-09-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/11/18/2175 |
| _version_ | 1798024448823001088 |
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| author | Ana Astort Thomas R. Walter Francisco Ruiz Lucía Sagripanti Andrés Nacif Gemma Acosta Andrés Folguera |
| author_facet | Ana Astort Thomas R. Walter Francisco Ruiz Lucía Sagripanti Andrés Nacif Gemma Acosta Andrés Folguera |
| author_sort | Ana Astort |
| collection | DOAJ |
| description | New volcanic unrest has been detected in the Domuyo Volcanic Center (DVC), to the east of the Andes Southern Volcanic Zone in Argentina. To better understand this activity, we investigated new seismic monitoring data, gravimetric and magnetic campaign data, and interferometric synthetic aperture radar (InSAR) deformation maps, and we derived an image of the magma plumbing system and the likely source of the unrest episode. Seismic events recorded during 2017−2018 nucleate beneath the southwestern flank of the DVC. Ground deformation maps derived from InSAR processing of Sentinel-1 data exhibit an inflation area exceeding 300 km<sup>2</sup>, from 2014 to at least March 2018, which can be explained by an inflating sill model located 7 km deep. The Bouguer anomaly reveals a negative density contrast of ~35 km wavelength, which is spatially coincident with the InSAR pattern. Our 3D density modeling suggests a body approximately 4−6 km deep with a density contrast of −550 kg/m<sup>3</sup>. Therefore, the geophysical and geodetic data allow identification of the plumbing system that is subject to inflation at these shallow crustal depths. We compared the presence and dimensions of the inferred doming area to the drainage patterns of the area, which support long-established incremental uplift according to morphometric analysis. Future studies will allow us to investigate further whether the new unrest is hydrothermal or magmatic in origin. |
| first_indexed | 2024-04-11T18:02:41Z |
| format | Article |
| id | doaj.art-0b74b6d82cfb4f7b847341a1440d68eb |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-04-11T18:02:41Z |
| publishDate | 2019-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-0b74b6d82cfb4f7b847341a1440d68eb2022-12-22T04:10:24ZengMDPI AGRemote Sensing2072-42922019-09-011118217510.3390/rs11182175rs11182175Unrest at Domuyo Volcano, Argentina, Detected by Geophysical and Geodetic Data and Morphometric AnalysisAna Astort0Thomas R. Walter1Francisco Ruiz2Lucía Sagripanti3Andrés Nacif4Gemma Acosta5Andrés Folguera6Laboratorio de Geodinámica, IDEAN, Universidad de Buenos Aires, CONICET, C1428EGA Buenos Aires, ArgentinaGFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, GermanyInstituto Geofísico Sismológico Ing. Volponi, Universidad Nacional de San Juan, 5407 San Juan, ArgentinaLaboratorio de Geodinámica, IDEAN, Universidad de Buenos Aires, CONICET, C1428EGA Buenos Aires, ArgentinaInstituto Geofísico Sismológico Ing. Volponi, Universidad Nacional de San Juan, 5407 San Juan, ArgentinaInstituto Geofísico Sismológico Ing. Volponi, Universidad Nacional de San Juan, 5407 San Juan, ArgentinaLaboratorio de Geodinámica, IDEAN, Universidad de Buenos Aires, CONICET, C1428EGA Buenos Aires, ArgentinaNew volcanic unrest has been detected in the Domuyo Volcanic Center (DVC), to the east of the Andes Southern Volcanic Zone in Argentina. To better understand this activity, we investigated new seismic monitoring data, gravimetric and magnetic campaign data, and interferometric synthetic aperture radar (InSAR) deformation maps, and we derived an image of the magma plumbing system and the likely source of the unrest episode. Seismic events recorded during 2017−2018 nucleate beneath the southwestern flank of the DVC. Ground deformation maps derived from InSAR processing of Sentinel-1 data exhibit an inflation area exceeding 300 km<sup>2</sup>, from 2014 to at least March 2018, which can be explained by an inflating sill model located 7 km deep. The Bouguer anomaly reveals a negative density contrast of ~35 km wavelength, which is spatially coincident with the InSAR pattern. Our 3D density modeling suggests a body approximately 4−6 km deep with a density contrast of −550 kg/m<sup>3</sup>. Therefore, the geophysical and geodetic data allow identification of the plumbing system that is subject to inflation at these shallow crustal depths. We compared the presence and dimensions of the inferred doming area to the drainage patterns of the area, which support long-established incremental uplift according to morphometric analysis. Future studies will allow us to investigate further whether the new unrest is hydrothermal or magmatic in origin.https://www.mdpi.com/2072-4292/11/18/2175Domuyo Volcanic CenterInSARmagma bodygeothermal unrest3D density modelBouguer Anomalyvolcanic source geometry modeling |
| spellingShingle | Ana Astort Thomas R. Walter Francisco Ruiz Lucía Sagripanti Andrés Nacif Gemma Acosta Andrés Folguera Unrest at Domuyo Volcano, Argentina, Detected by Geophysical and Geodetic Data and Morphometric Analysis Remote Sensing Domuyo Volcanic Center InSAR magma body geothermal unrest 3D density model Bouguer Anomaly volcanic source geometry modeling |
| title | Unrest at Domuyo Volcano, Argentina, Detected by Geophysical and Geodetic Data and Morphometric Analysis |
| title_full | Unrest at Domuyo Volcano, Argentina, Detected by Geophysical and Geodetic Data and Morphometric Analysis |
| title_fullStr | Unrest at Domuyo Volcano, Argentina, Detected by Geophysical and Geodetic Data and Morphometric Analysis |
| title_full_unstemmed | Unrest at Domuyo Volcano, Argentina, Detected by Geophysical and Geodetic Data and Morphometric Analysis |
| title_short | Unrest at Domuyo Volcano, Argentina, Detected by Geophysical and Geodetic Data and Morphometric Analysis |
| title_sort | unrest at domuyo volcano argentina detected by geophysical and geodetic data and morphometric analysis |
| topic | Domuyo Volcanic Center InSAR magma body geothermal unrest 3D density model Bouguer Anomaly volcanic source geometry modeling |
| url | https://www.mdpi.com/2072-4292/11/18/2175 |
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