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Collision and strike-slip faulting in the Northern Molucca sea (Philippines and Indonesia) : preliminary results of a morphotectonic study IRD
Rangin, C; Dahrin, D.; Quebral, R.; Bader, A.G.; Cadet, J.P.; Caglarcan, G.; Deffontaines, B.; Deplus, C.; Corpus, E.G.; Hall, R.; Hello, Yann; Malod, J.; Lallemand, S.; Layugan, D.B.; Louat, Rémy; Morales, R.; Pankow, K.; Pubellier, M.; Popoff, M.; Rodelas, R.T.; Yudho, T..
A swath mapping, gravity and single channel seismic survey was carried out in the northern Molucca Sea with R.V. L'Atalante. Preliminary interpretation of these data reveals the presence of an almost complete Sangihe arc and forearc. The Miangas-Pujada-Talaud ridge in the central part of the Molucca Sea appears to be a backstop within the Sangihe forearc. East of the ridge very contrasting terranes are separated by a major NW-SE crustal discontinuity interpreted as a left-lateral strike-slip fault. North of 6°N the Philipine Trench inner wall is dissected by NW-SE trending left-lateral strike-slip faults, resulting from the dominantly oblique convergence between colliding arcs. South of 6°N the westward subduction of the buoyant Snellius volcanic plateau,...
Tipo: Text Palavras-chave: TECTONIQUE DE PLAQUES; SUBDUCTION; GEODYNAMIQUE; GEOLOGIE STRUCTURALE.
Ano: 1996 URL: http://www.documentation.ird.fr/hor/fdi:010009476
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Deep-Sea Bioluminescence Blooms after Dense Water Formation at the Ocean Surface ArchiMer
Tamburini, Christian; Canals, Miquel; Durrieu De Madron, Xavier; Houpert, Loic; Lefevre, Dominique; Martini, Séverine; D'Ortenzio, Fabrizio; Robert, Anne; Testor, Pierre; Aguilar, Juan Antonio; Al Samarai, Imen; Albert, Arnaud; Andre, Michel; Anghinolfi, Marco; Anton, Gisela; Anvar, Shebli; Ardid, Miguel; Assis Jesus, Ana Carolina; Astraatmadja, Tri L.; Aubert, Jean-jacques; Baret, Bruny; Basa, Stephane; Bertin, Vincent; Biagi, Simone; Bigi, Armando; Bigongiari, Ciro; Bogazzi, Claudio; Bou-cabo, Manuel; Bouhou, Boutayeb; Bouwhuis, Mieke C.; Brunner, Jurgen; Busto, Jose; Camarena, Francisco; Capone, Antonio; Carloganu, Christina; Carminati, Giada; Carr, John; Cecchini, Stefano; Charif, Ziad; Charvis, Philippe; Chiarusi, Tommaso; Circella, Marco; Coniglione, Rosa; Costantini, Heide; Coyle, Paschal; Curtil, Christian; Decowski, Patrick; Dekeyser, Ivan; Deschamps, Anne; Donzaud, Corinne; Dornic, Damien; Dorosti, Hasankiadeh Q.; Drouhin, Doriane; Eberl, Thomas; Emanuele, Umberto; Ernenwein, Jean-pierre; Escoffier, Stephanie; Fermani, Paolo; Ferri, Marcelino; Flaminio, Vincenzo; Folger, Florian; Fritsch, Ulf; Fuda, Jean-luc; Galata, Salvatore; Gay, Pascal; Giacomelli, Giorgio; Giordano, Valentina; Gomez-gonzalez, Juan-pablo; Graf, Kay; Guillard, Goulven; Halladjian, Garadeb; Hallewell, Gregory; Van Haren, Hans; Hartman, Joris; Heijboer, Aart J.; Hello, Yann; Hernandez-rey, Juan Jose; Herold, Bjoern; Hossl, Jurgen; Hsu, Ching-cheng; De Jong, Marteen; Kadler, Matthias; Kalekin, Oleg; Kappes, Alexander; Katz, Uli; Kavatsyuk, Oksana; Kooijman, Paul; Kopper, Claudio; Kouchner, Antoine; Kreykenbohm, Ingo; Kulikovskiy, Vladimir; Lahmann, Robert; Lamare, Patrick; Larosa, Giuseppina; Lattuada, Dario; Lim, Gordon; Lo Presti, Domenico; Loehner, Herbert; Loucatos, Sotiris; Mangano, Salvatore; Marcelin, Michel; Margiotta, Annarita; Martinez-mora, Juan Antonio; Meli, Athina; Montaruli, Teresa; Moscoso, Luciano; Motz, Holger; Neff, Max; Nezri, Emmanuel; Palioselitis, Dimitris; Pavalas, Gabriela E.; Payet, Kevin; Payre, Patrice; Petrovic, Jelena; Piattelli, Paolo; Picot-clemente, Nicolas; Popa, Vlad; Pradier, Thierry; Presani, Eleonora; Racca, Chantal; Reed, Corey; Riccobene, Giorgio; Richardt, Carsten; Richter, Roland; Riviere, Colas; Roensch, Kathrin; Rostovtsev, Andrei; Ruiz-rivas, Joaquin; Rujoiu, Marius; Russo, Valerio G.; Salesa, Francisco; Sanchez-losa, Augustin; Sapienza, Piera; Schock, Friederike; Schuller, Jean-pierre; Schussler, Fabian; Shanidze, Rezo; Simeone, Francesco; Spies, Andreas; Spurio, Maurizio; Steijger, Jos J. M.; Stolarczyk, Thierry; Taiuti, Mauro G. F.; Toscano, Simona; Vallage, Bertrand; Van Elewyck, Veronique; Vannoni, Giulia; Vecchi, Manuela; Vernin, Pascal; Wijnker, Guus; Wilms, Jorn; De Wolf, Els; Yepes, Harold; Zaborov, Dmitry; Zornoza, Juan De Dios; Zuniga, Juan.
The deep ocean is the largest and least known ecosystem on Earth. It hosts numerous pelagic organisms, most of which are able to emit light. Here we present a unique data set consisting of a 2.5-year long record of light emission by deep-sea pelagic organisms, measured from December 2007 to June 2010 at the ANTARES underwater neutrino telescope in the deep NW Mediterranean Sea, jointly with synchronous hydrological records. This is the longest continuous time-series of deep-sea bioluminescence ever recorded. Our record reveals several weeks long, seasonal bioluminescence blooms with light intensity up to two orders of magnitude higher than background values, which correlate to changes in the properties of deep waters. Such changes are triggered by the...
Tipo: Text
Ano: 2013 URL: https://archimer.ifremer.fr/doc/00241/35256/33831.pdf
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Déploiement d'un réseau de sismographes sous-marins et terrestres en domaine Ligure (Méditerranée) : campagne SISBALIG 1 IRD
Déverchère, H.; Béthoux, N.; Hello, Yann; Louat, Rémy; Eva, C..
Tipo: Text Palavras-chave: SISMOLOGIE; SEISME; STATION DE RECEPTION; SISMOGRAPHE; MECANISME AU FOYER.
Ano: 1991 URL: http://www.documentation.ird.fr/hor/fdi:35419
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Etude d'un essaim de séismes dans le Sud du Vanuatu (SO-Pacifique) par un réseau de stations sismologiques sous-marines (OBS) IRD
Louat, Rémy; Frohlich, C.; Charvis, Philippe; Hello, Yann; Mac Phérson, P.; Nakamura, Y.; Pontoise, Bernard.
Tipo: Text Palavras-chave: SEISME; SISMOLOGIE; ESSAIM; ARC INSULAIRE; SUBDUCTION; TECTONIQUE; FAILLE.
Ano: 1989 URL: http://www.documentation.ird.fr/hor/fdi:26967
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Les stations sismiques sous-marines IRD
Charvis, Philippe; Hello, Yann.
Tipo: Text Palavras-chave: TECTONIQUE DE PLAQUES; APPAREIL DE MESURE; SISMOLOGIE; SURVEILLANCE; PROFIL SISMIQUE; PROPAGATION D'ONDE; SISMIQUE A REFRACTION.
Ano: 1987 URL: http://www.documentation.ird.fr/hor/fdi:010026408
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Seismic monitoring in the oceans by autonomous floats ArchiMer
Sukhovich, Alexey; Bonnieux, Sebastien; Hello, Yann; Irisson, Jean-olivier; Simons, Frederik J.; Nolet, Guust.
Our understanding of the internal dynamics of the Earth is largely based on images of seismic velocity variations in the mantle obtained with global tomography. However, our ability to image the mantle is severely hampered by a lack of seismic data collected in marine areas. Here we report observations made under different noise conditions (in the Mediterranean Sea, the Indian and Pacific Oceans) by a submarine floating seismograph, and show that such floats are able to fill the oceanic data gap. Depending on the ambient noise level, the floats can record between 35 and 63% of distant earthquakes with a moment magnitude M >= 6.5. Even magnitudes <6.0 can be successfully observed under favourable noise conditions. The serendipitous recording of an...
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Ano: 2015 URL: https://archimer.ifremer.fr/doc/00639/75127/75513.pdf
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Spatial distribution of hotspot material added to the lithosphere under La Reunion, from wide-angle seismic data ArchiMer
Charvis, Philippe; Laesanpura, Agus; Gallart, Josep; Hirn, Alfred; Lepine, Jean-claude; De Voogd, Beatrice; Minshull, Tim A.; Hello, Yann; Pontoise, Bernard.
Wide-angle seismic lines recorded by ocean bottom and land seismometers provide a pseudo three-dimensional investigation of the crust and upper mantle structure around the volcanically active hotspot island of La Reunion. The submarine part of the edifice has fairly low seismic velocities, without evidence for intrusives. An upper unit with a velocity-depth gradient is interpreted as made of material erupted subaerially then transported and compacted downslope. Between this unit and the top of the oceanic plate, imaged by normal incidence seismic reflection, a more homogeneous unit indicated by shadow zones on several wide-angle sections may correspond to lavas of a different nature, extruded underwater in the earlier phase of volcanism. Coincident wide...
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Ano: 1999 URL: https://archimer.ifremer.fr/doc/00147/25828/36822.pdf
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Strong Site Effect Revealed by a New Broadband Seismometer on the Continental Shelf Offshore Nice Airport (Southeastern France) ArchiMer
Courboulex, Francoise; Mercerat, E. Diego; Deschamps, Anne; Migeon, Sebastien; Baques, Marion; Larroque, Christophe; Rivet, Diane; Hello, Yann.
A broadband seismological station (PRIMA) installed offshore Nice airport (southeastern France) reveals a strong amplification effect of seismic waves. PRIMA station was in operation for 2 years (9/2016 to 10/2018) on the outer shelf at a water depth of 18 m. Situated at the mouth of the Var River, this zone is unstable and prone to landslides. A catastrophic landslide and tsunami already occurred in 1979, causing 10 casualties. Given the level of seismicity of the area, it is important to infer the impact of an earthquake on this zone. We analyze the recordings of earthquakes and seismic noise at the PRIMA station by comparing them to nearby inland stations. We find that the seismic waves are strongly amplified at PRIMA at some specific frequencies (with...
Tipo: Text Palavras-chave: Earthquakes; Site effects; Landslides; Offshore seismometer; Seismic hazard.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00659/77081/78405.pdf
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The 2010 Haiti earthquake: A complex fault pattern constrained by seismologic and tectonic observations ArchiMer
De Lepinay, Bernard Mercier; Deschamps, Anne; Klingelhoefer, Frauke; Mazabraud, Yves; Delouis, Bertrand; Clouard, Valerie; Hello, Yann; Crozon, Jacques; Marcaillou, Boris; Graindorge, David; Vallee, Martin; Perrot, Julie; Bouin, Marie-paule; Saurel, Jean-marie; Charvis, Philippe; St-louis, Mildor.
After the January 12, 2010, Haiti earthquake, we deployed a mainly offshore temporary network of seismologic stations around the damaged area. The distribution of the recorded aftershocks, together with morphotectonic observations and mainshock analysis, allow us to constrain a complex fault pattern in the area. Almost all of the aftershocks have a N-S compressive mechanism, and not the expected left-lateral strike-slip mechanism. A first-order slip model of the mainshock shows a N264 degrees E north-dipping plane, with a major left-lateral component and a strong reverse component. As the aftershock distribution is sub-parallel and close to the Enriquillo fault, we assume that although the cause of the catastrophe was not a rupture along the Enriquillo...
Tipo: Text
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00054/16557/14071.pdf
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The Wadati-Benioff zone around Copiapo, northern Chile using locally recorded data : preliminary results IRD
Comte, D.; Dorbath, Louis; Pontoise, Bernard; Pardo, M.; Monfret, Tony; Haessler, H.; Hello, Yann; Join, Yvan; Lorca, E.; Lavenu, Alain.
De septembre à novembre 1998, un réseau de 28 stations terrestres et 10 stations fond de mer (OBS) a été déployée entre les latitudes 26,5°S et 28,5°S pour enregistrer la sismicité locale. Nous présentons la géométrie de la zone de subduction obtenue à partir des 500 séismes localisés dans les 15 premiers jours de fonctionnement du réseau. (Résumé d'auteur)
Tipo: Text Palavras-chave: SUBDUCTION; MARGE CONTINENTALE ACTIVE; SISMOTECTONIQUE; SEISME; STATION DE MESURE; ETUDE REGIONALE.
Ano: 1999 URL: http://www.documentation.ird.fr/hor/fdi:010022663
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