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

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...

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Bibliographic Details
Published in:Solid earth (Göttingen) 2021-06, Vol.12 (6), p.1389-1409
Main Authors: Mader, Sarah, Ritter, Joachim R. R, Reicherter, Klaus
Format: Article
Language:English
Subjects:
Analysis
Delay time
Depth
Direction
Earth science
Earthquake damage
Earthquakes
Fault lines
Fault zones
Faults
Geological faults
Kinematics
Relocation
Sedimentary basins
Segmentation
Seismic activity
Seismic velocities
Seismic waves
Seismicity
Seismology
Shear zone
Stress distribution
Topography
Velocity
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Summary: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.sub.p and v.sub.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.
ISSN:1869-9529
1869-9510
1869-9529
DOI:10.5194/se-12-1389-2021