Slip-generated patterns of swarm microearthquakes from West Bohemia/Vogtland (central Europe): Evidence of their triggering mechanism?

2005 ◽  
Vol 110 (B5) ◽  
Author(s):  
Tomáš Fischer
Keyword(s):  
Central Europe ◽  
Triggering Mechanism ◽  
West Bohemia

Focal Mechanisms of West Bohemia, Central Europe, Earthquakes—End of May 2014: Evidence of Volume Changes

2021 ◽  
Author(s):  
Dana Křížová ◽  
Jiří Málek
Keyword(s):  
Central Europe ◽  
Moment Tensor ◽  
Waveform Inversion ◽  
Low Frequency ◽  
Earthquake Swarms ◽  
Quaternary Volcanism ◽  
Moment Tensors ◽  
Isotropic Part ◽  
West Bohemia ◽  
Source Mechanisms

Abstract West Bohemia is a region with a lot of mineral springs and gas outflows, which seems to be related to the remains of Quaternary volcanism in Central Europe. Earthquake swarms in shallow depths (less than 15 km) are very frequent there. We focused on the strongest earthquake over the past 30 yr (31 May, 2014 Mw∼3.8) and on two smaller ones (Mw∼2.9 and 2.5) from the same day. Seismograms from local and regional seismic stations were used to calculate the full and deviatoric moment tensors using low-frequency full-waveform inversion. The studied events have similar source mechanisms. The aforementioned earthquake sequence was selected to observe the isotropic part (negative value = implosion) of full moment tensors. It could relate to the motion and phase transition of fluids, especially water, and CO2. The main goal of this study is to contribute to clarification of the nature of earthquake swarms in the western edge of the Bohemian Massif. Negative value of the isotropic part of full moment tensor could be related to the closing of cracks and fissures during a rupture process.

scholarly journals Crustal deformations in the epicentral area of the West Bohemia 2008 earthquake swarm in central Europe

2012 ◽  
Vol 117 (B7) ◽  
pp. n/a-n/a ◽  
Author(s):  
Vladimír Schenk ◽  
Zdeňka Schenková ◽  
Zuzana Jechumtálová ◽  
Richard Pichl
Keyword(s):  
Central Europe ◽  
Earthquake Swarm ◽  
The West ◽  
Epicentral Area ◽  
West Bohemia
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