Evaluation of lava flow volumes from Hekla volcano based on new topographic data
Lava flows are a common product in various volcanoes on Earth, and are a product of non-explosive extrusions. Modelling of their properties and potential emplacement is important in many locations around the world, given the proximity of inhabited and agricultural areas to active volcanoes. Even if...
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ftskemman:oai:skemman.is:1946/17125 2023-05-15T16:34:00+02:00 Evaluation of lava flow volumes from Hekla volcano based on new topographic data Evaluación de volumenes de lava del volcán Hekla basados en nueva información topográfica Montalvo Morales, Jorge Eduardo 1981- Háskóli Íslands 2013-12 application/pdf http://hdl.handle.net/1946/17125 en eng http://hdl.handle.net/1946/17125 Jarðfræði Hraunrennsli Hekla (eldfjall) Reiknilíkön Thesis Master's 2013 ftskemman 2022-12-11T06:51:11Z Lava flows are a common product in various volcanoes on Earth, and are a product of non-explosive extrusions. Modelling of their properties and potential emplacement is important in many locations around the world, given the proximity of inhabited and agricultural areas to active volcanoes. Even if the area around Hekla is sparsely populated, Hekla is one of the most active volcanic systems in Iceland and is well known for its mixed eruptions. Hekla has erupted about 23 times since the settlement of Iceland. Lavas have been produced in at least 22 out of the 23 eruptions. In the past, some of these lavas have affected farms in the area. In this thesis we use new topographic data to obtain improved estimates of lava flow thicknesses around Hekla Volcano. Thickness is one of the parameters important for recalculation of flow volumes and potential assessment of hazards around Hekla and other similar volcanoes. We calculate the thicknesses along the margins of the flows using a high-resolution Digital Elevation Model based on new radar data. Additionally, we compiled a map of the recent historical lavas at Hekla based on previous lava maps, recent aerial images, and the new radar data. We tested the method on the 1980-1981 lava and we obtained an area of 23,04 km2, which is consistent with previous studies. Our volume estimate of 0,07 km3 is significantly lower that previous estimates. Finally, we used this method to calculate the area and volume for the 1878 and 1913 lavas. Our volume estimates are 0,03 km3 and 0,02 km3 respectively. Thesis Hekla Iceland Skemman (Iceland) |
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Open Polar |
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Skemman (Iceland) |
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ftskemman |
language |
English |
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Jarðfræði Hraunrennsli Hekla (eldfjall) Reiknilíkön |
spellingShingle |
Jarðfræði Hraunrennsli Hekla (eldfjall) Reiknilíkön Montalvo Morales, Jorge Eduardo 1981- Evaluation of lava flow volumes from Hekla volcano based on new topographic data |
topic_facet |
Jarðfræði Hraunrennsli Hekla (eldfjall) Reiknilíkön |
description |
Lava flows are a common product in various volcanoes on Earth, and are a product of non-explosive extrusions. Modelling of their properties and potential emplacement is important in many locations around the world, given the proximity of inhabited and agricultural areas to active volcanoes. Even if the area around Hekla is sparsely populated, Hekla is one of the most active volcanic systems in Iceland and is well known for its mixed eruptions. Hekla has erupted about 23 times since the settlement of Iceland. Lavas have been produced in at least 22 out of the 23 eruptions. In the past, some of these lavas have affected farms in the area. In this thesis we use new topographic data to obtain improved estimates of lava flow thicknesses around Hekla Volcano. Thickness is one of the parameters important for recalculation of flow volumes and potential assessment of hazards around Hekla and other similar volcanoes. We calculate the thicknesses along the margins of the flows using a high-resolution Digital Elevation Model based on new radar data. Additionally, we compiled a map of the recent historical lavas at Hekla based on previous lava maps, recent aerial images, and the new radar data. We tested the method on the 1980-1981 lava and we obtained an area of 23,04 km2, which is consistent with previous studies. Our volume estimate of 0,07 km3 is significantly lower that previous estimates. Finally, we used this method to calculate the area and volume for the 1878 and 1913 lavas. Our volume estimates are 0,03 km3 and 0,02 km3 respectively. |
author2 |
Háskóli Íslands |
format |
Thesis |
author |
Montalvo Morales, Jorge Eduardo 1981- |
author_facet |
Montalvo Morales, Jorge Eduardo 1981- |
author_sort |
Montalvo Morales, Jorge Eduardo 1981- |
title |
Evaluation of lava flow volumes from Hekla volcano based on new topographic data |
title_short |
Evaluation of lava flow volumes from Hekla volcano based on new topographic data |
title_full |
Evaluation of lava flow volumes from Hekla volcano based on new topographic data |
title_fullStr |
Evaluation of lava flow volumes from Hekla volcano based on new topographic data |
title_full_unstemmed |
Evaluation of lava flow volumes from Hekla volcano based on new topographic data |
title_sort |
evaluation of lava flow volumes from hekla volcano based on new topographic data |
publishDate |
2013 |
url |
http://hdl.handle.net/1946/17125 |
genre |
Hekla Iceland |
genre_facet |
Hekla Iceland |
op_relation |
http://hdl.handle.net/1946/17125 |
_version_ |
1766023750338215936 |