About: Principal earthquakes: Theory and observations from the 2008 West Bohemia swarm

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Earthquakes that occur on optimally oriented fault planes with respect to the tectonic stress regime display two distinct focal mechanisms and are fundamental characteristics of each seismically active region. These earthquakes, which we term 'principal', need not coincide with the strongest earthquakes or need not occur along the major active faults in the region. Stability analysis of diversely oriented fault planes under a given stress reveals that the focal mechanisms connected with unstable fault planes should not be very distinct from those of the principal earthquakes. The P/T axes form clusters with a typical two-wing or 'butterfly' pattern. This pattern is particularly visible when constructing the failure curves defined as a projection of the Mohr-Coulomb failure criterion in the Mohr's diagram onto the focal sphere. The position, shape and size of the failure curves depend on the stress orientation, shape ratio, friction and on the size of the instability area in the Mohr's diagram. Earthquakes that occur on optimally oriented fault planes with respect to the tectonic stress regime display two distinct focal mechanisms and are fundamental characteristics of each seismically active region. These earthquakes, which we term 'principal', need not coincide with the strongest earthquakes or need not occur along the major active faults in the region. Stability analysis of diversely oriented fault planes under a given stress reveals that the focal mechanisms connected with unstable fault planes should not be very distinct from those of the principal earthquakes. The P/T axes form clusters with a typical two-wing or 'butterfly' pattern. This pattern is particularly visible when constructing the failure curves defined as a projection of the Mohr-Coulomb failure criterion in the Mohr's diagram onto the focal sphere. The position, shape and size of the failure curves depend on the stress orientation, shape ratio, friction and on the size of the instability area in the Mohr's diagram. (en)
Title	Principal earthquakes: Theory and observations from the 2008 West Bohemia swarm Principal earthquakes: Theory and observations from the 2008 West Bohemia swarm (en)
skos:prefLabel	Principal earthquakes: Theory and observations from the 2008 West Bohemia swarm Principal earthquakes: Theory and observations from the 2008 West Bohemia swarm (en)
skos:notation	RIV/67985530:_____/11:00363814!RIV12-AV0-67985530
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(IAA300120801), Z(AV0Z30120515)
http://linked.open...iv/cisloPeriodika	3-4
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Vavryčuk, Václav
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Geofyzikální ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	223423
http://linked.open...ai/riv/idVysledku	RIV/67985530:_____/11:00363814
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	earthquake; failure criterion; fault friction; focal mechanism; tectonic stress (en)
http://linked.open.../riv/klicoveSlovo	fault friction focal mechanism tectonic stress earthquake failure criterion
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[F2A8171FF815]
http://linked.open...i/riv/nazevZdroje	Earth and Planetary Science Letters
http://linked.open...in/vavai/riv/obor	DC
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	1 (xsd:int)
http://linked.open...vavai/riv/projekt	Seismic waves and sources in anisotropic media II
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	305
http://linked.open...iv/tvurceVysledku	Vavryčuk, Václav
http://linked.open...ain/vavai/riv/wos	000291280000004
http://linked.open...n/vavai/riv/zamer	Study of the internal structure and dynamics of the Earth
issn	0012-821X
number of pages	7 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.epsl.2011.03.002

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