Seismicity and Crustal Structure in North Greenland
The crustal structure of Greenland varies greatly across the island. Previous studies have revealed that the region of North Greenland differs from the rest of Greenland, with a more shallow crustal thickness. Although this region is far from any plate boundary, earthquakes do occur. Locating these...
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The University of Bergen
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ftunivbergen:oai:bora.uib.no:1956/18127 2023-05-15T16:23:36+02:00 Seismicity and Crustal Structure in North Greenland Ellingsen, Annette 2018-06-19T22:00:12Z application/pdf https://hdl.handle.net/1956/18127 eng eng The University of Bergen https://hdl.handle.net/1956/18127 Copyright the Author. All rights reserved Greenland velocity model S-wave velocities seismikk seismiske bølger skorpestruktur https://data.ub.uio.no/realfagstermer/c000962 https://data.ub.uio.no/realfagstermer/c003287 https://data.ub.uio.no/realfagstermer/c000190 756199 Master thesis 2018 ftunivbergen 2023-03-14T17:41:53Z The crustal structure of Greenland varies greatly across the island. Previous studies have revealed that the region of North Greenland differs from the rest of Greenland, with a more shallow crustal thickness. Although this region is far from any plate boundary, earthquakes do occur. Locating these intraplate earthquakes can lead to a better understanding of the seismicity in the area. A challenge of understanding this region is the lack of seismic data available, as few seismic stations are in operation. However, four temporary stations were in operation from 2004 to 2007, and the data obtained gives new insights in the tectonic processes in the remote area. The velocity model used in this region today is a uniform velocity model for all of Greenland. Using the same velocity model for the entire island is not logical, as the crustal structure varies. It is thus beneficial to obtain a regional velocity model for North Greenland. The main objective of this thesis has been to find a new velocity model for North Greenland and this has been done using information about the crustal structure in the region. To obtain the knowledge needed, a joint inversion of receiver functions and apparent S-wave velocities has been performed. Shear wave velocity as a function of depth beneath the seismic stations was obtained and further implemented into a new regional velocity model. Earthquakes in the area were then relocated and the different locations were compared to locations obtained with the Greenland Velocity Model. Masteroppgave i geovitenskap MAMN-GEOV GEOV399 Master Thesis Greenland North Greenland University of Bergen: Bergen Open Research Archive (BORA-UiB) Greenland |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
Greenland velocity model S-wave velocities seismikk seismiske bølger skorpestruktur https://data.ub.uio.no/realfagstermer/c000962 https://data.ub.uio.no/realfagstermer/c003287 https://data.ub.uio.no/realfagstermer/c000190 756199 |
spellingShingle |
Greenland velocity model S-wave velocities seismikk seismiske bølger skorpestruktur https://data.ub.uio.no/realfagstermer/c000962 https://data.ub.uio.no/realfagstermer/c003287 https://data.ub.uio.no/realfagstermer/c000190 756199 Ellingsen, Annette Seismicity and Crustal Structure in North Greenland |
topic_facet |
Greenland velocity model S-wave velocities seismikk seismiske bølger skorpestruktur https://data.ub.uio.no/realfagstermer/c000962 https://data.ub.uio.no/realfagstermer/c003287 https://data.ub.uio.no/realfagstermer/c000190 756199 |
description |
The crustal structure of Greenland varies greatly across the island. Previous studies have revealed that the region of North Greenland differs from the rest of Greenland, with a more shallow crustal thickness. Although this region is far from any plate boundary, earthquakes do occur. Locating these intraplate earthquakes can lead to a better understanding of the seismicity in the area. A challenge of understanding this region is the lack of seismic data available, as few seismic stations are in operation. However, four temporary stations were in operation from 2004 to 2007, and the data obtained gives new insights in the tectonic processes in the remote area. The velocity model used in this region today is a uniform velocity model for all of Greenland. Using the same velocity model for the entire island is not logical, as the crustal structure varies. It is thus beneficial to obtain a regional velocity model for North Greenland. The main objective of this thesis has been to find a new velocity model for North Greenland and this has been done using information about the crustal structure in the region. To obtain the knowledge needed, a joint inversion of receiver functions and apparent S-wave velocities has been performed. Shear wave velocity as a function of depth beneath the seismic stations was obtained and further implemented into a new regional velocity model. Earthquakes in the area were then relocated and the different locations were compared to locations obtained with the Greenland Velocity Model. Masteroppgave i geovitenskap MAMN-GEOV GEOV399 |
format |
Master Thesis |
author |
Ellingsen, Annette |
author_facet |
Ellingsen, Annette |
author_sort |
Ellingsen, Annette |
title |
Seismicity and Crustal Structure in North Greenland |
title_short |
Seismicity and Crustal Structure in North Greenland |
title_full |
Seismicity and Crustal Structure in North Greenland |
title_fullStr |
Seismicity and Crustal Structure in North Greenland |
title_full_unstemmed |
Seismicity and Crustal Structure in North Greenland |
title_sort |
seismicity and crustal structure in north greenland |
publisher |
The University of Bergen |
publishDate |
2018 |
url |
https://hdl.handle.net/1956/18127 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland North Greenland |
genre_facet |
Greenland North Greenland |
op_relation |
https://hdl.handle.net/1956/18127 |
op_rights |
Copyright the Author. All rights reserved |
_version_ |
1766011844888100864 |