How does the geomorphometry of a volcanic island influence the stability of its flanks?
Volcanic islands are known to be a source of many natural hazards associated with active volcanism. The processes leading to the instability of their flanks, however are less well understood. The movement of an instable volcanic flank occurs in either or both of two ways; slow sliding of several cm...
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ftoceanrep:oai:oceanrep.geomar.de:55569 2023-05-15T18:23:34+02:00 How does the geomorphometry of a volcanic island influence the stability of its flanks? Klein, Elisa Urlaub, Morelia Krastel, Sebastian 2022 text https://oceanrep.geomar.de/id/eprint/55569/ https://oceanrep.geomar.de/id/eprint/55569/1/DGG_Poster_Final.pdf en eng https://oceanrep.geomar.de/id/eprint/55569/1/DGG_Poster_Final.pdf Klein, E., Urlaub, M. and Krastel, S. (2022) How does the geomorphometry of a volcanic island influence the stability of its flanks?. Open Access [Paper] In: DGG-Jahrestagung 2022. , 07.-10.03.2022, München (online) . info:eu-repo/semantics/openAccess Conference or Workshop Item NonPeerReviewed 2022 ftoceanrep 2023-04-07T16:01:26Z Volcanic islands are known to be a source of many natural hazards associated with active volcanism. The processes leading to the instability of their flanks, however are less well understood. The movement of an instable volcanic flank occurs in either or both of two ways; slow sliding of several cm per year (i.e. Etna, Italy) and/or the catastrophic collapse of a large portion of the edifice (i.e. Anak Krakatau, Indonesia). The conditions and precursors leading to such events are often unknown. The limited availability of high-resolution bathymetry data especially at the coast is often restricting the quantitative geomorphological investigation to the subaerial part of the volcanic island. It is essential, however, to include the entire volcanic edifice as instability affects the volcano from summit to seafloor. In this study, we test whether and in which way, the morphology of the volcanic edifice affects its instability. We combine openly available high-resolution bathymetric and topographic grids (50-150m grid spacing) to create shoreline-crossing DEMs of volcanic islands in four areas (archipelagos of Hawaii, Canaries, Mariana Islands and South Sandwich Islands). Morphological parameters, such as area, volume, height from seafloor, slope etc. of the entire volcanic edifice are derived from the DEM grids and inserted into a database. The statistical analysis of this data combined with the history of flank failure will shed light on the influence the morphology of a volcanic island has on its instability. This will lead to a better understanding of the processes involved in the movement of instable volcanic flanks. Conference Object South Sandwich Islands OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Sandwich Islands South Sandwich Islands |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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English |
description |
Volcanic islands are known to be a source of many natural hazards associated with active volcanism. The processes leading to the instability of their flanks, however are less well understood. The movement of an instable volcanic flank occurs in either or both of two ways; slow sliding of several cm per year (i.e. Etna, Italy) and/or the catastrophic collapse of a large portion of the edifice (i.e. Anak Krakatau, Indonesia). The conditions and precursors leading to such events are often unknown. The limited availability of high-resolution bathymetry data especially at the coast is often restricting the quantitative geomorphological investigation to the subaerial part of the volcanic island. It is essential, however, to include the entire volcanic edifice as instability affects the volcano from summit to seafloor. In this study, we test whether and in which way, the morphology of the volcanic edifice affects its instability. We combine openly available high-resolution bathymetric and topographic grids (50-150m grid spacing) to create shoreline-crossing DEMs of volcanic islands in four areas (archipelagos of Hawaii, Canaries, Mariana Islands and South Sandwich Islands). Morphological parameters, such as area, volume, height from seafloor, slope etc. of the entire volcanic edifice are derived from the DEM grids and inserted into a database. The statistical analysis of this data combined with the history of flank failure will shed light on the influence the morphology of a volcanic island has on its instability. This will lead to a better understanding of the processes involved in the movement of instable volcanic flanks. |
format |
Conference Object |
author |
Klein, Elisa Urlaub, Morelia Krastel, Sebastian |
spellingShingle |
Klein, Elisa Urlaub, Morelia Krastel, Sebastian How does the geomorphometry of a volcanic island influence the stability of its flanks? |
author_facet |
Klein, Elisa Urlaub, Morelia Krastel, Sebastian |
author_sort |
Klein, Elisa |
title |
How does the geomorphometry of a volcanic island influence the stability of its flanks? |
title_short |
How does the geomorphometry of a volcanic island influence the stability of its flanks? |
title_full |
How does the geomorphometry of a volcanic island influence the stability of its flanks? |
title_fullStr |
How does the geomorphometry of a volcanic island influence the stability of its flanks? |
title_full_unstemmed |
How does the geomorphometry of a volcanic island influence the stability of its flanks? |
title_sort |
how does the geomorphometry of a volcanic island influence the stability of its flanks? |
publishDate |
2022 |
url |
https://oceanrep.geomar.de/id/eprint/55569/ https://oceanrep.geomar.de/id/eprint/55569/1/DGG_Poster_Final.pdf |
geographic |
Sandwich Islands South Sandwich Islands |
geographic_facet |
Sandwich Islands South Sandwich Islands |
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South Sandwich Islands |
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South Sandwich Islands |
op_relation |
https://oceanrep.geomar.de/id/eprint/55569/1/DGG_Poster_Final.pdf Klein, E., Urlaub, M. and Krastel, S. (2022) How does the geomorphometry of a volcanic island influence the stability of its flanks?. Open Access [Paper] In: DGG-Jahrestagung 2022. , 07.-10.03.2022, München (online) . |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766203593422012416 |