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| http://dbpedia.org/ontology/abstract | In geophysics, geology, civil engineering, … In geophysics, geology, civil engineering, and related disciplines, seismic noise is a generic name for a relatively persistent vibration of the ground, due to a multitude of causes, that is often a non-interpretable or unwanted component of signals recorded by seismometers. Physically, seismic noise arises primarily due to surface or near surface sources and thus consists mostly of elastic surface waves. Low frequency waves (below 1 Hz) are commonly called microseisms and high frequency waves (above 1 Hz) are called microtremors. Primary sources of seismic waves include human activities (such as transportation or industrial activities), winds and other atmospheric phenomena, rivers, and ocean waves. Seismic noise is relevant to any discipline that depends on seismology, including geology, oil exploration, hydrology, and earthquake engineering, and structural health monitoring. It is often called the ambient wavefield or ambient vibrations in those disciplines (however, the latter term may also refer to vibrations transmitted through by air, building, or supporting structures.) Seismic noise is often a nuisance for activities that are sensitive to extraneous vibrations, including earthquake monitoring and research, precision milling, telescopes, gravitational wave detectors, and crystal growing. However, seismic noise also has practical uses, including determining the low-strain and time-varying dynamic properties of civil-engineering structures, such as bridges, buildings, and dams; seismic studies of subsurface structure at many scales, often using the methods of seismic interferometry; Environmental monitoring, such as in fluvial seismology; and estimating seismic microzonation maps to characterize local and regional ground response during earthquakes.gional ground response during earthquakes. , Le bruit sismique est un ensemble de vibra … Le bruit sismique est un ensemble de vibrations permanentes du sol, dues à une multitude de causes. C'est une composante des sismogrammes (les signaux enregistrés par les sismomètres), généralement indésirable et difficilement interprétable. Le bruit sismique a des causes naturelles (vents et autres phénomènes atmosphériques, vagues océaniques, etc.) et des causes humaines (circulation automobile, machinerie lourde, etc.). Le bruit sismique est principalement constitué d'ondes de surface. Les ondes de basse fréquence (inférieure à un hertz) sont généralement qualifiées de microséismes, et celles de haute fréquence (> 1 Hz) de (en). Le bruit sismique affecte toutes les disciplines dépendant de la sismologie, comme la géologie, l' (en), l'hydrologie, le génie parasismique et le contrôle de santé intégré. Dans ces disciplines il est souvent qualifié de champ d'ondes ambiant ou de vibrations ambiantes. Le bruit sismique est une nuisance pour les activités sensibles aux vibrations, telles que les mesures de haute précision, le fraisage de précision, les télescopes et la croissance des cristaux. Il a aussi des utilisations pratiques, par exemple pour déterminer les propriétés dynamiques à faible contrainte des ouvrages de génie civil (ponts, bâtiments, barrages, etc.) ou pour caractériser les propriétés élastiques du sous-sol et dresser des cartes de (en).du sous-sol et dresser des cartes de (en). , In der Seismologie sowie der Seismik bezei … In der Seismologie sowie der Seismik bezeichnet das Rauschen alle zufälligen und ungewollten Signalanteile, die an einem Messpunkt zusammen mit dem gewünschten Nutzsignal durch das Messinstrument aufgezeichnet werden. Da die durch Erdbeben oder künstlich (z. B. durch Sprengung) angeregten seismische Wellen mit steigender Entfernung meist sehr schwach werden, wirkt sich das Rauschen üblicherweise störend aus und behindert die Auswertung der gewonnenen Daten.ndert die Auswertung der gewonnenen Daten. |
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| rdfs:comment | Le bruit sismique est un ensemble de vibra … Le bruit sismique est un ensemble de vibrations permanentes du sol, dues à une multitude de causes. C'est une composante des sismogrammes (les signaux enregistrés par les sismomètres), généralement indésirable et difficilement interprétable. Le bruit sismique a des causes naturelles (vents et autres phénomènes atmosphériques, vagues océaniques, etc.) et des causes humaines (circulation automobile, machinerie lourde, etc.).tion automobile, machinerie lourde, etc.). , In geophysics, geology, civil engineering, … In geophysics, geology, civil engineering, and related disciplines, seismic noise is a generic name for a relatively persistent vibration of the ground, due to a multitude of causes, that is often a non-interpretable or unwanted component of signals recorded by seismometers.onent of signals recorded by seismometers. , In der Seismologie sowie der Seismik bezei … In der Seismologie sowie der Seismik bezeichnet das Rauschen alle zufälligen und ungewollten Signalanteile, die an einem Messpunkt zusammen mit dem gewünschten Nutzsignal durch das Messinstrument aufgezeichnet werden. Da die durch Erdbeben oder künstlich (z. B. durch Sprengung) angeregten seismische Wellen mit steigender Entfernung meist sehr schwach werden, wirkt sich das Rauschen üblicherweise störend aus und behindert die Auswertung der gewonnenen Daten.ndert die Auswertung der gewonnenen Daten. |
| rdfs:label | Bruit sismique , Seismic noise , Rauschen (Seismologie) |
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