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Seismicity and seismotectonics of the Albstadt Shear Zone in the northern Alpine foreland

Mader, Sarah 1; Ritter, Joachim R. R. 1; Reicherter, Klaus
1 Geophysikalisches Institut (GPI), Karlsruher Institut für Technologie (KIT)

Abstract:
The region around the town Albstadt, SW Germany, was struck by four damaging earthquakes with magnitudes greater than 5 during the last century. These earthquakes occurred along the Albstadt Shear Zone (ASZ), which is characterized by more or less continuous microseismicity. As there are no visible surface ruptures that may be connected to the fault zone, we study its characteristics by its seismicity distribution and faulting pattern. We use the earthquake data of the state earthquake service of Baden-Württemberg from 2011 to 2018 and complement it with additional phase picks beginning in 2016 at the AlpArray and StressTransfer seismic networks in the vicinity of the ASZ. This extended data set is used to determine new minimum 1-D seismic v$_{p}$ and v$_{s}$ velocity models and corresponding station delay times for earthquake relocation. Fault plane solutions are determined for selected events, and the principal stress directions are derived.
The minimum 1-D seismic velocity models have a simple and stable layering with increasing velocity with depth in the upper crust. The corresponding station delay times can be explained well by the lateral depth variation of the crystalline basement. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000134588
Veröffentlicht am 01.07.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Geophysikalisches Institut (GPI)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 1869-9529
KITopen-ID: 1000134588
Erschienen in Solid earth
Verlag Copernicus Publications
Band 12
Heft 6
Seiten 1389–1409
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 16.06.2021
Nachgewiesen in Web of Science
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Scopus
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