Subsidence events in the Krafla area: Preliminary report based on tilt and distance measurements
In the inflation-deflation sequence of the Krafla magma chamber since its beginning in 1975, 10 deflation or subsidence events have been identified until July 1978. The tilt and distance measurements relating to these subsidence events are discussed in some detail. All of these subsidence events are...
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Nordic Volcanological Institute, University of Iceland, Reykjavik, IS
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ftunivnotexas:info:ark/67531/metadc883805 2023-05-15T16:50:03+02:00 Subsidence events in the Krafla area: Preliminary report based on tilt and distance measurements Tryggvason, Eysteinn United States. Department of Energy. 1978-12-01 Text https://doi.org/10.2172/890965 https://digital.library.unt.edu/ark:/67531/metadc883805/ English eng Nordic Volcanological Institute, University of Iceland, Reykjavik, IS rep-no: VI-78-14-7 doi:10.2172/890965 osti: 890965 https://digital.library.unt.edu/ark:/67531/metadc883805/ ark: ark:/67531/metadc883805 Calderas Ground Subsidence Geothermal Legacy Volcanoes Iceland Geothermal Legacy Lava Magma 58 Geosciences Report 1978 ftunivnotexas https://doi.org/10.2172/890965 2019-05-18T22:08:08Z In the inflation-deflation sequence of the Krafla magma chamber since its beginning in 1975, 10 deflation or subsidence events have been identified until July 1978. The tilt and distance measurements relating to these subsidence events are discussed in some detail. All of these subsidence events are associated with horizontal magma flow along the N-S trending fissure zone, which goes through the central part of the suggested Krafla caldera to form a dike 3 to 5 meter wide, 80 km long and 1.0 to 2.5 km high from the bottom to the top. The total volume of magma, which flowed out of the Krafla magma chamber during these 10 events, is estimated as 392 x 10{sup 6} m{sup 3}, whereof 318 x 10{sup 6} m{sup 3} are estimated to have flowed northwards, 72 x 10{sup 6} m{sup 3} southwards and about 2 x 10{sup 6} m{sup 3} came to the surface as basaltic lava. Report Iceland University of North Texas: UNT Digital Library Krafla ENVELOPE(-16.747,-16.747,65.713,65.713) |
institution |
Open Polar |
collection |
University of North Texas: UNT Digital Library |
op_collection_id |
ftunivnotexas |
language |
English |
topic |
Calderas Ground Subsidence Geothermal Legacy Volcanoes Iceland Geothermal Legacy Lava Magma 58 Geosciences |
spellingShingle |
Calderas Ground Subsidence Geothermal Legacy Volcanoes Iceland Geothermal Legacy Lava Magma 58 Geosciences Tryggvason, Eysteinn Subsidence events in the Krafla area: Preliminary report based on tilt and distance measurements |
topic_facet |
Calderas Ground Subsidence Geothermal Legacy Volcanoes Iceland Geothermal Legacy Lava Magma 58 Geosciences |
description |
In the inflation-deflation sequence of the Krafla magma chamber since its beginning in 1975, 10 deflation or subsidence events have been identified until July 1978. The tilt and distance measurements relating to these subsidence events are discussed in some detail. All of these subsidence events are associated with horizontal magma flow along the N-S trending fissure zone, which goes through the central part of the suggested Krafla caldera to form a dike 3 to 5 meter wide, 80 km long and 1.0 to 2.5 km high from the bottom to the top. The total volume of magma, which flowed out of the Krafla magma chamber during these 10 events, is estimated as 392 x 10{sup 6} m{sup 3}, whereof 318 x 10{sup 6} m{sup 3} are estimated to have flowed northwards, 72 x 10{sup 6} m{sup 3} southwards and about 2 x 10{sup 6} m{sup 3} came to the surface as basaltic lava. |
author2 |
United States. Department of Energy. |
format |
Report |
author |
Tryggvason, Eysteinn |
author_facet |
Tryggvason, Eysteinn |
author_sort |
Tryggvason, Eysteinn |
title |
Subsidence events in the Krafla area: Preliminary report based on tilt and distance measurements |
title_short |
Subsidence events in the Krafla area: Preliminary report based on tilt and distance measurements |
title_full |
Subsidence events in the Krafla area: Preliminary report based on tilt and distance measurements |
title_fullStr |
Subsidence events in the Krafla area: Preliminary report based on tilt and distance measurements |
title_full_unstemmed |
Subsidence events in the Krafla area: Preliminary report based on tilt and distance measurements |
title_sort |
subsidence events in the krafla area: preliminary report based on tilt and distance measurements |
publisher |
Nordic Volcanological Institute, University of Iceland, Reykjavik, IS |
publishDate |
1978 |
url |
https://doi.org/10.2172/890965 https://digital.library.unt.edu/ark:/67531/metadc883805/ |
long_lat |
ENVELOPE(-16.747,-16.747,65.713,65.713) |
geographic |
Krafla |
geographic_facet |
Krafla |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
rep-no: VI-78-14-7 doi:10.2172/890965 osti: 890965 https://digital.library.unt.edu/ark:/67531/metadc883805/ ark: ark:/67531/metadc883805 |
op_doi |
https://doi.org/10.2172/890965 |
_version_ |
1766040244290846720 |