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Conference Paper

Comparison of relative locations methods and their accuracy for determining fault structures

Authors

Konrádová,  Diana
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Horálek,  Josef
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Doubravová,  Jana
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Konrádová, D., Horálek, J., Doubravová, J. (2023): Comparison of relative locations methods and their accuracy for determining fault structures, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-2710


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019181
Abstract
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.