Quantification of Eruption Dynamics on the North Rift at Axial Seamount, Juan de Fuca Ridge
Abstract Quantifying eruption dynamics in submarine environments is challenging. During the 2015 eruption of Axial Seamount, the formation of hummocky mounds along the north rift was accompanied by tens of thousands of impulsive acoustic signals generated by the interaction of lava and seawater. A c...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2020-09-01
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| Series: | Geochemistry, Geophysics, Geosystems |
| Subjects: | |
| Online Access: | https://doi.org/10.1029/2020GC009136 |
| _version_ | 1797637980453601280 |
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| author | M. Le Saout D. R. Bohnenstiehl J. B. Paduan D. A. Clague |
| author_facet | M. Le Saout D. R. Bohnenstiehl J. B. Paduan D. A. Clague |
| author_sort | M. Le Saout |
| collection | DOAJ |
| description | Abstract Quantifying eruption dynamics in submarine environments is challenging. During the 2015 eruption of Axial Seamount, the formation of hummocky mounds along the north rift was accompanied by tens of thousands of impulsive acoustic signals generated by the interaction of lava and seawater. A catalog of these sounds was integrated with detailed seafloor mapping to better understand eruptive processes in time and space. Mounds grew over a period of 28 days with average extrusion rates of 22 to 45 m3 s−1. The most distant mounds, ~9.5 to 15.5 km down rift from the caldera, grew primarily over the first few days of the eruption. The focus of eruptive activity then retreated ~5 km toward the caldera where it was sustained. Mounds are constructed as a series of superimposed lobes formed through alternating periods of flow inflation, generating up to 30‐m‐thick hummocks, and periods of flow advancement, with <0.02 m s−1 average speeds typically observed. |
| first_indexed | 2024-03-11T12:56:02Z |
| format | Article |
| id | doaj.art-ec2db5bd1c6d42e99279ba1f9a2ad345 |
| institution | Directory Open Access Journal |
| issn | 1525-2027 |
| language | English |
| last_indexed | 2024-03-11T12:56:02Z |
| publishDate | 2020-09-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geochemistry, Geophysics, Geosystems |
| spelling | doaj.art-ec2db5bd1c6d42e99279ba1f9a2ad3452023-11-03T17:01:07ZengWileyGeochemistry, Geophysics, Geosystems1525-20272020-09-01219n/an/a10.1029/2020GC009136Quantification of Eruption Dynamics on the North Rift at Axial Seamount, Juan de Fuca RidgeM. Le Saout0D. R. Bohnenstiehl1J. B. Paduan2D. A. Clague3Monterey Bay Aquarium Research Institute Moss Landing CA USADepartment of Marine, Earth and Atmospheric Sciences and Center for Geospatial Analytics North Carolina State University Raleigh NC USAMonterey Bay Aquarium Research Institute Moss Landing CA USAMonterey Bay Aquarium Research Institute Moss Landing CA USAAbstract Quantifying eruption dynamics in submarine environments is challenging. During the 2015 eruption of Axial Seamount, the formation of hummocky mounds along the north rift was accompanied by tens of thousands of impulsive acoustic signals generated by the interaction of lava and seawater. A catalog of these sounds was integrated with detailed seafloor mapping to better understand eruptive processes in time and space. Mounds grew over a period of 28 days with average extrusion rates of 22 to 45 m3 s−1. The most distant mounds, ~9.5 to 15.5 km down rift from the caldera, grew primarily over the first few days of the eruption. The focus of eruptive activity then retreated ~5 km toward the caldera where it was sustained. Mounds are constructed as a series of superimposed lobes formed through alternating periods of flow inflation, generating up to 30‐m‐thick hummocks, and periods of flow advancement, with <0.02 m s−1 average speeds typically observed.https://doi.org/10.1029/2020GC009136mid‐ocean ridgevolcanismeruption dynamicshydroacoustic dataJuan de Fuca Ridge |
| spellingShingle | M. Le Saout D. R. Bohnenstiehl J. B. Paduan D. A. Clague Quantification of Eruption Dynamics on the North Rift at Axial Seamount, Juan de Fuca Ridge Geochemistry, Geophysics, Geosystems mid‐ocean ridge volcanism eruption dynamics hydroacoustic data Juan de Fuca Ridge |
| title | Quantification of Eruption Dynamics on the North Rift at Axial Seamount, Juan de Fuca Ridge |
| title_full | Quantification of Eruption Dynamics on the North Rift at Axial Seamount, Juan de Fuca Ridge |
| title_fullStr | Quantification of Eruption Dynamics on the North Rift at Axial Seamount, Juan de Fuca Ridge |
| title_full_unstemmed | Quantification of Eruption Dynamics on the North Rift at Axial Seamount, Juan de Fuca Ridge |
| title_short | Quantification of Eruption Dynamics on the North Rift at Axial Seamount, Juan de Fuca Ridge |
| title_sort | quantification of eruption dynamics on the north rift at axial seamount juan de fuca ridge |
| topic | mid‐ocean ridge volcanism eruption dynamics hydroacoustic data Juan de Fuca Ridge |
| url | https://doi.org/10.1029/2020GC009136 |
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