Comparison of relative locations methods and their accuracy for determining fault structures
Precise earthquake locations are a prerequisite for determining real fault structures. To improve the precision of the event location, a few relative locations methods are commonly used to refine event locations. Relative relocation methods reduce effects of an imperfect velocity model and errors du...
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5019181 2023-10-09T21:52:43+02:00 Comparison of relative locations methods and their accuracy for determining fault structures Konrádová, D. Horálek, J. Doubravová, J. 2023 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019181 eng eng info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-2710 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019181 XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) info:eu-repo/semantics/conferenceObject 2023 ftgfzpotsdam https://doi.org/10.57757/IUGG23-2710 2023-09-17T23:43:20Z Precise earthquake locations are a prerequisite for determining real fault structures. To improve the precision of the event location, a few relative locations methods are commonly used to refine event locations. Relative relocation methods reduce effects of an imperfect velocity model and errors due to arrival time measurement. We performed comparative tests of three different relocation methods: HypoDD (HD), GrowClust (GC) and Master event (ME). We tested the efficiency and differences in the event locations using these three methods on dataset from REYKJANET seismic network operating in Iceland on Reykjanes Peninsula. All these methods provide substantially focused shapes of clusters compared to the absolute event locations but the locations of individual events differ evidently depending on the method used. We also aimed at an effect of the control parameters of HD, GC and ME on final location results and their optimization as well as computational and memory demands. Conference Object Iceland GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Reykjanes ENVELOPE(-22.250,-22.250,65.467,65.467) |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
English |
description |
Precise earthquake locations are a prerequisite for determining real fault structures. To improve the precision of the event location, a few relative locations methods are commonly used to refine event locations. Relative relocation methods reduce effects of an imperfect velocity model and errors due to arrival time measurement. We performed comparative tests of three different relocation methods: HypoDD (HD), GrowClust (GC) and Master event (ME). We tested the efficiency and differences in the event locations using these three methods on dataset from REYKJANET seismic network operating in Iceland on Reykjanes Peninsula. All these methods provide substantially focused shapes of clusters compared to the absolute event locations but the locations of individual events differ evidently depending on the method used. We also aimed at an effect of the control parameters of HD, GC and ME on final location results and their optimization as well as computational and memory demands. |
format |
Conference Object |
author |
Konrádová, D. Horálek, J. Doubravová, J. |
spellingShingle |
Konrádová, D. Horálek, J. Doubravová, J. Comparison of relative locations methods and their accuracy for determining fault structures |
author_facet |
Konrádová, D. Horálek, J. Doubravová, J. |
author_sort |
Konrádová, D. |
title |
Comparison of relative locations methods and their accuracy for determining fault structures |
title_short |
Comparison of relative locations methods and their accuracy for determining fault structures |
title_full |
Comparison of relative locations methods and their accuracy for determining fault structures |
title_fullStr |
Comparison of relative locations methods and their accuracy for determining fault structures |
title_full_unstemmed |
Comparison of relative locations methods and their accuracy for determining fault structures |
title_sort |
comparison of relative locations methods and their accuracy for determining fault structures |
publishDate |
2023 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019181 |
long_lat |
ENVELOPE(-22.250,-22.250,65.467,65.467) |
geographic |
Reykjanes |
geographic_facet |
Reykjanes |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-2710 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019181 |
op_doi |
https://doi.org/10.57757/IUGG23-2710 |
_version_ |
1779315894290219008 |