Subglacial volcano monitoring with fibre-optic sensing: Grímsvötn, Iceland
We present a distributed acoustic sensing (DAS) experiment at Grímsvötn, Iceland. This is intended to investigate volcano-microseismicity at Grímsvötn specifically, and to assess the suitability of DAS as a subglacial volcano monitoring tool in general. In spring 2021, we trenched a 12 km long fiber...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Volcanica
2023-09-01
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| Series: | Volcanica |
| Subjects: | |
| Online Access: | https://www.jvolcanica.org/ojs/index.php/volcanica/article/view/225 |
| _version_ | 1797692242300764160 |
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| author | Sara Klaasen Solvi Thrastarson Yeşim Çubuk-Sabuncu Kristín Jónsdóttir Lars Gebraad Patrick Paitz Andreas Fichtner |
| author_facet | Sara Klaasen Solvi Thrastarson Yeşim Çubuk-Sabuncu Kristín Jónsdóttir Lars Gebraad Patrick Paitz Andreas Fichtner |
| author_sort | Sara Klaasen |
| collection | DOAJ |
| description | We present a distributed acoustic sensing (DAS) experiment at Grímsvötn, Iceland. This is intended to investigate volcano-microseismicity at Grímsvötn specifically, and to assess the suitability of DAS as a subglacial volcano monitoring tool in general. In spring 2021, we trenched a 12 km long fiber-optic cable into the ice sheet around and within the caldera, followed by nearly one month of continuous recording. An image processing algorithm that exploits spatial coherence in DAS data detects on average ~100 events per day, almost 2 orders of magnitude more than in the regional earthquake catalog. A nonlinear Bayesian inversion reveals the presence of pronounced seismicity clusters, containing events with magnitudes between −3.4 and 1.7. Their close proximity to surface volcanic features suggests a geothermal origin. In addition to painting a fine-scale picture of seismic activity at Grímsvötn, this work confirms the potential of DAS in subglacial volcano monitoring. |
| first_indexed | 2024-03-12T02:25:45Z |
| format | Article |
| id | doaj.art-1fada8d2c5bd4753b38a4066931652f8 |
| institution | Directory Open Access Journal |
| issn | 2610-3540 |
| language | English |
| last_indexed | 2024-03-12T02:25:45Z |
| publishDate | 2023-09-01 |
| publisher | Volcanica |
| record_format | Article |
| series | Volcanica |
| spelling | doaj.art-1fada8d2c5bd4753b38a4066931652f82023-09-05T13:08:45ZengVolcanicaVolcanica2610-35402023-09-016230131110.30909/vol.06.02.301311210Subglacial volcano monitoring with fibre-optic sensing: Grímsvötn, IcelandSara Klaasen0https://orcid.org/0000-0003-4094-7891Solvi Thrastarson1https://orcid.org/0000-0003-0931-6776Yeşim Çubuk-Sabuncu2https://orcid.org/0000-0002-9572-3468Kristín Jónsdóttir3https://orcid.org/0000-0003-0589-929XLars Gebraad4Patrick Paitz5Andreas Fichtner6https://orcid.org/0000-0003-3090-963XETH ZurichETH ZurichVedurstofaVedurstofaETH ZurichETH ZurichETH ZurichWe present a distributed acoustic sensing (DAS) experiment at Grímsvötn, Iceland. This is intended to investigate volcano-microseismicity at Grímsvötn specifically, and to assess the suitability of DAS as a subglacial volcano monitoring tool in general. In spring 2021, we trenched a 12 km long fiber-optic cable into the ice sheet around and within the caldera, followed by nearly one month of continuous recording. An image processing algorithm that exploits spatial coherence in DAS data detects on average ~100 events per day, almost 2 orders of magnitude more than in the regional earthquake catalog. A nonlinear Bayesian inversion reveals the presence of pronounced seismicity clusters, containing events with magnitudes between −3.4 and 1.7. Their close proximity to surface volcanic features suggests a geothermal origin. In addition to painting a fine-scale picture of seismic activity at Grímsvötn, this work confirms the potential of DAS in subglacial volcano monitoring.https://www.jvolcanica.org/ojs/index.php/volcanica/article/view/225seismic activitysubglacialactive volcanoesmonitoringvolcano-seismology |
| spellingShingle | Sara Klaasen Solvi Thrastarson Yeşim Çubuk-Sabuncu Kristín Jónsdóttir Lars Gebraad Patrick Paitz Andreas Fichtner Subglacial volcano monitoring with fibre-optic sensing: Grímsvötn, Iceland Volcanica seismic activity subglacial active volcanoes monitoring volcano-seismology |
| title | Subglacial volcano monitoring with fibre-optic sensing: Grímsvötn, Iceland |
| title_full | Subglacial volcano monitoring with fibre-optic sensing: Grímsvötn, Iceland |
| title_fullStr | Subglacial volcano monitoring with fibre-optic sensing: Grímsvötn, Iceland |
| title_full_unstemmed | Subglacial volcano monitoring with fibre-optic sensing: Grímsvötn, Iceland |
| title_short | Subglacial volcano monitoring with fibre-optic sensing: Grímsvötn, Iceland |
| title_sort | subglacial volcano monitoring with fibre optic sensing grimsvotn iceland |
| topic | seismic activity subglacial active volcanoes monitoring volcano-seismology |
| url | https://www.jvolcanica.org/ojs/index.php/volcanica/article/view/225 |
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