English
 
Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
Add to Basket
  DetailsSummary

Released
Conference Paper

Rotational ground motion recordings in the West-Bohemian/Vogtland region: 6-component waveforms for inversion for seismic moment tensors

Authors

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

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

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

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

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

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

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

External Ressource
No external resources are shared
Fulltext (public)
There are no public fulltexts stored in GFZpublic
Supplementary Material (public)
There is no public supplementary material available
Citation

Donner, S., Lehr, J., Hoffmann, M., Heimann, S., Krüger, F., Abreu, R., Durand, S. (2023): Rotational ground motion recordings in the West-Bohemian/Vogtland region: 6-component waveforms for inversion for seismic moment tensors, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-1822


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017765
Abstract
The West-Bohemian/Vogtland region (Germany/Czech Republic) is well known for its frequent intraplate swarm activity related to fluid flow within the crust. Previous studies found that non-double-couple components (non-DC: isotropic, CLVD) contribute significantly to the seismic moment tensors of these events. They were interpreted as tensile faulting associated with the migration of deep magmatic fluids through the crust. However, so far the results are restricted to a few larger events. The accurate and precise determination of non-DC components during waveform inversion for moment tensors is difficult, especially for smaller magnitude events (M&lt;3.5).<p>In earlier synthetic studies the joint inversion of translational and rotational waveforms improved the resolution of the moment tensor. In this project “NonDC-BoVo” – funded within the frame of the ICDP EGER project – two rotational sensors were deployed collocated with translational seismometers. The acquired data present one of the first examples using field data to invert waveforms for the moment tensor. The sensors show a good sensitivity even for low magnitude events. In seven months, the “Seismologie-Verbund zur Erdbebenbeobachtung in Mitteldeutschland” reports 521 events occurring within a distance of up to 30 km.<p>Here, we present data examples together with an estimation of the magnitude of completeness from rotational recordings. Based on the signal-noise-ratio, we estimate a magnitude of completeness of around 0.3 for the rotational data compared to -0.7 from the catalogue. We found that the transversal translation corresponds well to the vertical rotation for a phase velocity of 2000 m/s at frequencies of 10-20 Hz.