ŠPAČEK, Petr, Zdeňka SÝKOROVÁ, Jana PAZDÍRKOVÁ, Jan ŠVANCARA a Josef HAVÍŘ. Present-day Seismicity of the Southeastern Elbe Fault System (NE Bohemian Massif). Studia geophysica et geodaetica. Praha: Geofyzikální ústav AV ČR, 2006, roč. 50, č. 4, s. 233-258, 25 s. ISSN 0039-3169.
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Základní údaje
Originální název Present-day Seismicity of the Southeastern Elbe Fault System (NE Bohemian Massif)
Název česky Recentní seismicita jihovýchodní části labského zlomového systému (sv. část Českého masivu)
Autoři ŠPAČEK, Petr (203 Česká republika, garant), Zdeňka SÝKOROVÁ (203 Česká republika), Jana PAZDÍRKOVÁ (203 Česká republika), Jan ŠVANCARA (203 Česká republika) a Josef HAVÍŘ (203 Česká republika).
Vydání Studia geophysica et geodaetica, Praha, Geofyzikální ústav AV ČR, 2006, 0039-3169.
Další údaje
Originální jazyk angličtina
Typ výsledku Článek v odborném periodiku
Obor 10507 Volcanology
Stát vydavatele Česká republika
Utajení není předmětem státního či obchodního tajemství
Impakt faktor Impact factor: 0.603
Kód RIV RIV/00216224:14310/06:00015851
Organizační jednotka Přírodovědecká fakulta
UT WoS 000237665100005
Klíčová slova anglicky Sudetes; Bohemian Massif; Elbe Fault System; seismicity; fault activity; focal mechanisms; fluids
Štítky Bohemian massif, Elbe Fault System, fault activity, fluids, focal mechanisms, seismicity, Sudetes
Změnil Změnil: Mgr. Petr Špaček, Ph.D., učo 18763. Změněno: 19. 9. 2006 15:25.
Anotace
The Variscan Bohemian Massif is disrupted by the NW-SE striking Elbe Fault System in its northern part. The increased tectonic activity associated with this structure is manifested by increased seismicity in the eastern part of the Sudetes. With the use of a temporary local seismic network, the total number of micro-earthquakes located in this region increased to 153 for the period 1996-2003. The local magnitudes vary between -0.6 and 1.8 and the seismic energy was often released in swarm-like sequences. Five seismic events with well-defined P-onset polarities at five or six stations enabled the estimation of focal mechanisms. The present-day activity of the WNW-ESE to NNW-SSE fault systems is discussed on the basis of source mechanisms, the alignment of the epicentres, as well as morphological and geological evidence. The majority of the recent seismic activity is concentrated in a 40-60 km wide zone of a generally NW-SE trend. This structure represents a regional zone of weakness within the SE termination of the Elbe Fault System, defined by a mesh of interconnected faults, of which many are deep-seated and highly permeable and some are associated with light to moderate historical earthquakes. Both in the areas due south and due north of this zone the present-day seismic activity is very low. The increased tectonic activity can be interpreted as a result of the abundance of suitably oriented faults and their interconnection into major fault systems, the proximity of the Outer Carpathian indentor and the Cainozoic volcanic and associated recent post-volcanic activity. The similar character of swarms and their coincidence with the post-volcanic activity in the southeastern part of the Elbe Fault System and in some focal zones of the western Bohemian seismically active area suggests that overpressurized fluids may represent a potential swarm-triggering mechanism.
Anotace česky
The Variscan Bohemian Massif is disrupted by the NW-SE striking Elbe Fault System in its northern part. The increased tectonic activity associated with this structure is manifested by increased seismicity in the eastern part of the Sudetes. With the use of a temporary local seismic network, the total number of micro-earthquakes located in this region increased to 153 for the period 1996-2003. The local magnitudes vary between -0.6 and 1.8 and the seismic energy was often released in swarm-like sequences. Five seismic events with well-defined P-onset polarities at five or six stations enabled the estimation of focal mechanisms. The present-day activity of the WNW-ESE to NNW-SSE fault systems is discussed on the basis of source mechanisms, the alignment of the epicentres, as well as morphological and geological evidence. The majority of the recent seismic activity is concentrated in a 40-60 km wide zone of a generally NW-SE trend. This structure represents a regional zone of weakness within the SE termination of the Elbe Fault System, defined by a mesh of interconnected faults, of which many are deep-seated and highly permeable and some are associated with light to moderate historical earthquakes. Both in the areas due south and due north of this zone the present-day seismic activity is very low. The increased tectonic activity can be interpreted as a result of the abundance of suitably oriented faults and their interconnection into major fault systems, the proximity of the Outer Carpathian indentor and the Cainozoic volcanic and associated recent post-volcanic activity. The similar character of swarms and their coincidence with the post-volcanic activity in the southeastern part of the Elbe Fault System and in some focal zones of the western Bohemian seismically active area suggests that overpressurized fluids may represent a potential swarm-triggering mechanism.
Návaznosti
GP205/02/D139, projekt VaVNázev: Seismické a reologické vlastnosti spodnokorových hornin a jejich podíl na anizotropii litosféry
Investor: Grantová agentura ČR, Postdoktorské projekty
MSM0021622412, záměrNázev: Interakce mezi chemickými látkami, prostředím a biologickými systémy a jejich důsledky na globální, regionální a lokální úrovni (INCHEMBIOL) (Akronym: INCHEMBIOL)
Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, Výzkumné záměry
VytisknoutZobrazeno: 5. 8. 2021 09:05