2018
DOI: 10.1029/2018tc005163
|View full text |Cite
|
Sign up to set email alerts
|

Detection of Stress Anomaly Produced by Interaction of Compressive Fault Steps in the West Bohemia Swarm Region, Czech Republic

Abstract: Observations of the 2008–2014 seismic activity in West Bohemia, Czech Republic, provide evidence of interaction of compressive fault steps that created local stress anomaly and triggered a seismic sequence with exceptional properties. The West Bohemia is a geothermal area, characterized by persistent fluid‐driven seismicity in the form of earthquake swarms. The focal zone is formed by two weak and fluid‐eroded parallel strike‐slip faults with a step of about 200 m. The fault segments were activated successivel… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1
1

Citation Types

0
13
0

Year Published

2019
2019
2024
2024

Publication Types

Select...
7
2

Relationship

2
7

Authors

Journals

citations
Cited by 10 publications
(13 citation statements)
references
References 58 publications
0
13
0
Order By: Relevance
“…1, 2). The western part of the WSW-ENE-trending Eger Rift, particularly the Cheb Basin, which formed along NNW-SSEtrending faults (Špičáková et al 2000;Rojik et al 2014), is at present the most active geodynamic region in the European Cenozoic Rift System (ECRIS) with a high number of earthquake swarms at least in the last 40 years (Fischer et al 2014;Vavryčuk and Adamová 2018) as well as mantlederived CO 2 -degassing (Weinlich et al 1999;Bräuer et al 2009Bräuer et al , 2014Kämpf et al 2013Kämpf et al , 2019Nickschick et al 2015). The progressive increase of the He 3 /He 4 ratio at the eastern part of the Cheb Basin since about 2000 with shorttime peaks up to 6.3 R a in 2000 and 2006 at the Bublák mofette indicates an ascent of less degassed magma (dyke intrusion) from the lithospheric mantle reservoir into the crust (Bräuer et al 2009(Bräuer et al , 2018.…”
Section: Geodynamic Setting and Previous Investigationsmentioning
confidence: 99%
“…1, 2). The western part of the WSW-ENE-trending Eger Rift, particularly the Cheb Basin, which formed along NNW-SSEtrending faults (Špičáková et al 2000;Rojik et al 2014), is at present the most active geodynamic region in the European Cenozoic Rift System (ECRIS) with a high number of earthquake swarms at least in the last 40 years (Fischer et al 2014;Vavryčuk and Adamová 2018) as well as mantlederived CO 2 -degassing (Weinlich et al 1999;Bräuer et al 2009Bräuer et al , 2014Kämpf et al 2013Kämpf et al , 2019Nickschick et al 2015). The progressive increase of the He 3 /He 4 ratio at the eastern part of the Cheb Basin since about 2000 with shorttime peaks up to 6.3 R a in 2000 and 2006 at the Bublák mofette indicates an ascent of less degassed magma (dyke intrusion) from the lithospheric mantle reservoir into the crust (Bräuer et al 2009(Bräuer et al , 2018.…”
Section: Geodynamic Setting and Previous Investigationsmentioning
confidence: 99%
“…12). The local tectonic movement that created these two opposite flexures would have generated local stress heterogeneity, similar to the case of stress anomaly produced by the interactions of discontinuous parallel fault segments (Crider and Pollard 1998;Vavryčuk and Adamova 2018). Since there is no information on the geometry of faults that created the flexures nor on the amount of accumulated slip, a quantitative discussion is not possible.…”
Section: Discussionmentioning
confidence: 99%
“…13). The local tectonic movement that created these two opposite exures would have generated local stress heterogeneity, similar to the case of stress anomaly produced by the interactions of discontinuous parallel fault segments (Crider and Pollard 1998;Vavryčuk and Adamova 2018). Since there is no information on the geometry of faults that created the exures nor on the amount of accumulated slip, a quantitative discussion is not possible.…”
Section: Origin Of Local Stress Heterogeneitymentioning
confidence: 99%