Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados 5 (2) Autor Barruol, Guilhem (1) Bohnenstiehl, Dr (1) Davy, Celine (1) Desbruyeres, Daniel (1) Dziak, Rp (1) Fontaine, Fabrice R. (1) Fornari, Dj (1) Fox, Cg (1) Matsumoto, H (1) Sigloch, Karin (1) Smith, Dk (1) Stutzmann, Eleonore (1) Tolstoy, M (1) Mais... Palavra-chave Hydroacoustic (2) Earthquake (1) Indian Ocean (1) Major storms (1) Microseismic noise (1) Mid Atlantic Ridge (1) Ocean bottom seismometers (OBS) (1) Rayleigh waves (1) Mais... Tipo do documento Text (2) Ano 2014 (1) 2004 (1) País France (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Evidence of a recent magma dike intrusion at the slow spreading Lucky Strike segment, Mid-Atlantic Ridge - art. no. B12102 5 Dziak, Rp; Smith, Dk; Bohnenstiehl, Dr; Fox, Cg; Desbruyeres, Daniel; Matsumoto, H; Tolstoy, M; Fornari, Dj. [1] Mid-ocean ridge volcanic activity is the fundamental process for creation of ocean crust, yet the dynamics of magma emplacement along the slow spreading Mid-Atlantic Ridge ( MAR) are largely unknown. We present acoustical, seismological, and biological evidence of a magmatic dike intrusion at the Lucky Strike segment, the first detected from the deeper sections (> 1500 m) of the MAR. The dike caused the largest teleseismic earthquake swarm recorded at Lucky Strike in > 20 years of seismic monitoring, and one of the largest ever recorded on the northern MAR. Hydrophone records indicate that the rate of earthquake activity decays in a nontectonic manner and that the onset of the swarm was accompanied by 30 min of broadband (> 3 Hz) intrusion... Tipo: Text Palavras-chave: Mid Atlantic Ridge; Earthquake; Hydroacoustic. Ano: 2004 URL: https://archimer.ifremer.fr/doc/00000/10897/7768.pdf Tracking major storms from microseismic and hydroacoustic observations on the seafloor 5 Davy, Celine; Barruol, Guilhem; Fontaine, Fabrice R.; Sigloch, Karin; Stutzmann, Eleonore. Ocean wave activity excites seismic waves that propagate through the solid earth, known as microseismic noise. Here we use a network of 57 ocean bottom seismometers (OBS) deployed around La Réunion Island in the southwest Indian Ocean to investigate the noise generated in the secondary microseismic band as a tropical cyclone moved over the network. Spectral and polarization analyses show that microseisms strongly increase in the 0.1–0.35 Hz frequency band as the cyclone approaches and that this noise is composed of both compressional and surface waves, confirming theoretical predictions. We infer the location of maximum noise amplitude in space and time and show that it roughly coincides with the location of maximum ocean wave interactions. Although this... Tipo: Text Palavras-chave: Microseismic noise; Ocean bottom seismometers (OBS); Major storms; Indian Ocean; Hydroacoustic; Rayleigh waves. Ano: 2014 URL: https://archimer.ifremer.fr/doc/00287/39824/38331.pdf Registros recuperados: 2 Primeira ... 1 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco