dor_id: 4132892

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336.#.#.b: article

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336.#.#.a: Artículo

351.#.#.6: http://revistagi.geofisica.unam.mx/index.php/RGI

351.#.#.b: Geofísica Internacional

351.#.#.a: Artículos

harvesting_group: RevistasUNAM

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100.1.#.a: Boldyrev, A.

524.#.#.a: Boldyrev, A. (1996). Angola-Brazil Geotraverse: Ocean-bottom seismoacoustic observations. Geofísica Internacional; Vol. 35 Núm. 3: Julio 1, 1996; 315-327. Recuperado de https://repositorio.unam.mx/contenidos/4132892

245.1.0.a: Angola-Brazil Geotraverse: Ocean-bottom seismoacoustic observations

502.#.#.c: Universidad Nacional Autónoma de México

561.1.#.a: Instituto de Geofísica, UNAM

264.#.0.c: 1996

264.#.1.c: 1996-07-01

653.#.#.a: OBS; Cuenca de Angola; Dorsal del Atlantico Sur; fases T; Angola Basin; South Atlantic Rise; T-phases

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884.#.#.k: http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/568

001.#.#.#: 063.oai:revistagi.geofisica.unam.mx:article/568

041.#.7.h: spa

520.3.#.a: OBS observations were carried out during the period 1980-1986 at more than 100 sites along the Angola-Brazil Geoiraverse (12°S between l2°E and 30°W). Microearthquake activity .. was registered in the region of the Mid-Atlantic Ridge (MAR) within the area where strong earthquakes exist Standard features are similar to other MAR segments: (1) the occurrence of earthquakes at contrasting relief forms; (2) shallow hypocenter depth (2 to 7 km); (3) rapid attenuation of seismic waves under the seafloor; (4) velocity ratio Vp/Vs=l.74. Frequency-temporal variations in the seismic background and in the microseismicity of the Gabon Fault ~ere detected, presumably connected with volcanic processes. T-phase variations at distances exceeding 5000 km suggest the formation of a hydroacoustic signal near the epicenter on the continental slopes (maximum), and on smooth slopes of the continental margin. The intensity of the hydro-acoustic waves in the frequency range 3 to 20 Hz decreases with depth of recording. Residuals of PKP-waves, recorded in the Angola Basin and in Europe, suggest that the properties of the medium under these structures are similar. No lateral variations of velocity were found under a 600 x 600 km area in the Angola Basin.doi: https://doi.org/10.22201/igeof.00167169p.1996.35.3.465

773.1.#.t: Geofísica Internacional; Vol. 35 Núm. 3: Julio 1, 1996; 315-327

773.1.#.o: http://revistagi.geofisica.unam.mx/index.php/RGI

022.#.#.a: ISSN-L: 2954-436X; ISSN impreso: 0016-7169

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doi: https://doi.org/10.22201/igeof.00167169p.1996.35.3.465

handle: 00a44bdf5817dda3

harvesting_date: 2023-06-20 16:00:00.0

856.#.0.q: application/pdf

file_creation_date: 2008-02-14 20:00:17.0

file_modification_date: 2022-07-08 19:21:52.0

file_creator: A. Boldyrev

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245.1.0.b: Angola-Brazil Geotraverse: Ocean-bottom seismoacoustic observations

last_modified: 2023-06-20 16:00:00

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Artículo

Angola-Brazil Geotraverse: Ocean-bottom seismoacoustic observations

Boldyrev, A.

Instituto de Geofísica, UNAM, publicado en Geofísica Internacional, y cosechado de Revistas UNAM

Licencia de uso

Procedencia del contenido

Entidad o dependencia
Instituto de Geofísica, UNAM
Revista
Repositorio
Contacto
Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx

Cita

Boldyrev, A. (1996). Angola-Brazil Geotraverse: Ocean-bottom seismoacoustic observations. Geofísica Internacional; Vol. 35 Núm. 3: Julio 1, 1996; 315-327. Recuperado de https://repositorio.unam.mx/contenidos/4132892

Descripción del recurso

Autor(es)
Boldyrev, A.
Tipo
Artículo de Investigación
Área del conocimiento
Físico Matemáticas y Ciencias de la Tierra
Título
Angola-Brazil Geotraverse: Ocean-bottom seismoacoustic observations
Fecha
1996-07-01
Resumen
OBS observations were carried out during the period 1980-1986 at more than 100 sites along the Angola-Brazil Geoiraverse (12°S between l2°E and 30°W). Microearthquake activity .. was registered in the region of the Mid-Atlantic Ridge (MAR) within the area where strong earthquakes exist Standard features are similar to other MAR segments: (1) the occurrence of earthquakes at contrasting relief forms; (2) shallow hypocenter depth (2 to 7 km); (3) rapid attenuation of seismic waves under the seafloor; (4) velocity ratio Vp/Vs=l.74. Frequency-temporal variations in the seismic background and in the microseismicity of the Gabon Fault ~ere detected, presumably connected with volcanic processes. T-phase variations at distances exceeding 5000 km suggest the formation of a hydroacoustic signal near the epicenter on the continental slopes (maximum), and on smooth slopes of the continental margin. The intensity of the hydro-acoustic waves in the frequency range 3 to 20 Hz decreases with depth of recording. Residuals of PKP-waves, recorded in the Angola Basin and in Europe, suggest that the properties of the medium under these structures are similar. No lateral variations of velocity were found under a 600 x 600 km area in the Angola Basin.doi: https://doi.org/10.22201/igeof.00167169p.1996.35.3.465
Tema
OBS; Cuenca de Angola; Dorsal del Atlantico Sur; fases T; Angola Basin; South Atlantic Rise; T-phases
Idioma
spa
ISSN
ISSN-L: 2954-436X; ISSN impreso: 0016-7169

Enlaces