Les essais de Michel, seigneur de Montaigne

Copia digital. Madrid : Ministerio de Cultura. Subdirección General de Coordinación Bibliotecaria, 2007Marca tip. en port.Sign.: []1, ã1, ¶-3¶6, A-4E6, 4F3Port. a dos tintasTexto con apostillas marginale

First installation of an optical OBS, cabled offshore Les Saintes, Lesser Antilles

The detection, analysis and modeling of seismic processes worldwide very often requires the use of ocean bottom seismometer (OBS). Indeed, the largest earthquakes and transient slow slip events (SSEs) mostly occur offshore or near oceanic coasts, along the major plate boundaries, and in particular on the interplate thrust fault of subduction zones. However, most OBS deployments are done with stand-alone stations, with data recovery delayed by months or years. On the other hand, electrically cabled OBS, which allow for real-time monitoring, like in Japan (DONET), USA(Neptune), or France (EMSO Ligure), remain exceptional due to their very high cost of manufacturing, installation, and maintenance. Here we present a new perspective for such cabled array of OBSs, using innovative, purely optical seismometers, plugged at the end of long fiber optic cables, aimed at reducing the cost of installation and maintenance for permanent observatories requesting real-time data. The optical seismometer has been developped in the last decade by ESEO, based on Fabry-Perot (FP) interferometer, tracking at high resolution (rms 30 pm) the displacement of the mobile mass of a 10 Hz, 3 component, purely mechanical geophone (no electronics nor feedback). A prototype has been successfully installed at the top of La Soufrière volcano of Guadeloupe, in 2019, at the termination of a 1.5 km long fiber. We replicated and marinized this sensor, and in June 2021 we installed it 5 km offshore the Les Saintes islands (Guadeloupe, Lesser Antilles), for better characterizing the intriguing swarm-type activity still persistent after the 2004, M6.3, Les Saintes destructive earthquake (Interreg Caraïbe PREST project). The cruise, FIBROSAINTES, was supported by the Flotte Oceanographique Française (FOF) with the N/O Antéa Research Vessel. A plow, designed by GEOAZUR, carried the reel with its cable, and was pulled on the sea floor by the vessel, burying the cable. The seismometer was installed by divers at the depth of 43 m. The landing cable in the harbour of Terre-de-Bas was connected to the interrogator, and the record are since telemetered in real-time to the Observatory of Guadeloupe (OVSG). The optical OBS has been qualified by comparison to the records of the M7.5 Haiti 2021 earthquake from a nearby land-based broad-band seismometer. A few local earthquake swarms have been recorded, allowing for a preliminary discussion of their mechanical origin. In 2024 the seismometer should be complemented by two other ocean bottom, innovative, high resolution instruments, a pressiometer and an hydrostatic tiltmeter, designed by ENS. This successfull installation opens promising perspectives for the seismic real-time monitoring in many other sites offshore, and more generally in any site, natural or industrial, presenting harsh environmental conditions, where commercial, electrical sensors are difficult and/or costly to install and to maintain, or simply cannot be operated. Cite this article as (2022). First installation of an optical OBS, cabled offshore Les Saintes, Lesser Antilles, Seismol. Res. Lett. XX, 2-24, doi:

First installation of an optical OBS, cabled offshore Les Saintes, Lesser Antilles

The detection, analysis and modeling of seismic processes worldwide very often requires the use of ocean bottom seismometer (OBS). Indeed, the largest earthquakes and transient slow slip events (SSEs) mostly occur offshore or near oceanic coasts, along the major plate boundaries, and in particular on the interplate thrust fault of subduction zones. However, most OBS deployments are done with stand-alone stations, with data recovery delayed by months or years. On the other hand, electrically cabled OBS, which allow for real-time monitoring, like in Japan (DONET), USA(Neptune), or France (EMSO Ligure), remain exceptional due to their very high cost of manufacturing, installation, and maintenance. Here we present a new perspective for such cabled array of OBSs, using innovative, purely optical seismometers, plugged at the end of long fiber optic cables, aimed at reducing the cost of installation and maintenance for permanent observatories requesting real-time data. The optical seismometer has been developped in the last decade by ESEO, based on Fabry-Perot (FP) interferometer, tracking at high resolution (rms 30 pm) the displacement of the mobile mass of a 10 Hz, 3 component, purely mechanical geophone (no electronics nor feedback). A prototype has been successfully installed at the top of La Soufrière volcano of Guadeloupe, in 2019, at the termination of a 1.5 km long fiber. We replicated and marinized this sensor, and in June 2021 we installed it 5 km offshore the Les Saintes islands (Guadeloupe, Lesser Antilles), for better characterizing the intriguing swarm-type activity still persistent after the 2004, M6.3, Les Saintes destructive earthquake (Interreg Caraïbe PREST project). The cruise, FIBROSAINTES, was supported by the Flotte Oceanographique Française (FOF) with the N/O Antéa Research Vessel. A plow, designed by GEOAZUR, carried the reel with its cable, and was pulled on the sea floor by the vessel, burying the cable. The seismometer was installed by divers at the depth of 43 m. The landing cable in the harbour of Terre-de-Bas was connected to the interrogator, and the record are since telemetered in real-time to the Observatory of Guadeloupe (OVSG). The optical OBS has been qualified by comparison to the records of the M7.5 Haiti 2021 earthquake from a nearby land-based broad-band seismometer. A few local earthquake swarms have been recorded, allowing for a preliminary discussion of their mechanical origin. In 2024 the seismometer should be complemented by two other ocean bottom, innovative, high resolution instruments, a pressiometer and an hydrostatic tiltmeter, designed by ENS. This successfull installation opens promising perspectives for the seismic real-time monitoring in many other sites offshore, and more generally in any site, natural or industrial, presenting harsh environmental conditions, where commercial, electrical sensors are difficult and/or costly to install and to maintain, or simply cannot be operated. Cite this article as (2022). First installation of an optical OBS, cabled offshore Les Saintes, Lesser Antilles, Seismol. Res. Lett. XX, 2-24, doi:

French ichthyological records for 2018

International audienceUncommon records of fishes may evidence local or global changes in fish composition resulting from environmental change or anthropogenic activities. Significant records of uncommon marine fishes, including migrant, non-native, cryptic, rare and threatened species, collected in French waters or by French vessels in European waters, observed by scuba divers or beachgoers, are reported for the year 2018. They include first, new, rare and unusual records for the following 52 species: Hexanchus griseus, Squatina squatina, Gymnura altavela, Acipenser sturio, A. gueldenstaedtii, Dalophis imberbis, Nemichthys curvirostris, Eurypharynx pelecanoides, Maulisia mauli, M. microlepis, Sagamichthys schnakenbecki, Melanostomias bartonbeani, Astronesthes niger*, Leptostomias gladiator*, Chlorophthalmus agassizi, Magnisudis atlantica, Evermannella balbo, Regalecus glesne, Luvarus imperialis, Raniceps raninus, Fistularia cf. petimba*, Trigla lyra, Lepidotrigla dieuzeidei, Micrenophrys lilljeborgii, Howella atlantica*, Pomatomus saltatrix, Serranus cabrilla, Caranx crysos, Seriola rivoliana, Trachinotus ovatus, Lobotes surinamensis, Sarpa salpa, Chelon ramada, Pseudoscopelus altipinnis*, Trachinus draco, Parablennius pilicornis, P. ruber, Buenia affinis, B. jeffreysii, Chromogobius zebratus, Didogobius splechtnai, Gammogobius steinitzi, Gobius couchi, G. kolombatovici, Lebetus sp., Speleogobius trigloides, Thorogobius macrolepis, Vanneaugobius dollfusi, Siganus rivulatus*, Lepidocybium flavobrunneum, Hyperoglyphe sp. et Pegusa cf. nasuta, among which six, marked with an asterisk (*), represent additions to the Checklist of the marine fishes from metropolitan France and one, N. curvirostris, is a first record for the Mediterranean

Collection d'autographes formée par Félix et Paul Nadar. XXV Renan-Rysserlberghe.

Contient : Lefort, Adrien, pseud.. Lettre(s) reçue(s) ; Renan, Ernest. Lettre(s) ; Renard, Georges, professeur au Collège de France. Lettre(s) ; Joseph-Renaud, Jean, journaliste. Lettre(s) ; Renaut, Joseph, pseud. Saulnax, Sylvain de, professeur à la Faculté de Médecine de Lyon. Lettre(s), photos ; Nadar, Félix Tournachon dit . Lettre(s) ; Renneville, Olympe Vallée, Mme Paul de Lascaux, pseud. Vicomtesse O. de, journaliste. Lettre(s) ; Renoir, Pierre, acteur. Lettre(s) ; Renou, E.. Lettre(s) ; Revillet, Docteur L.. Lettre(s) ; Révillon, Tony, homme politique. Lettre(s) ; Révoil, Georges, explorateur. Lettre(s) ; Révoil, Paul, homme politique. Lettre(s) ; Rey, Docteur Émile, député. Carte(s) ; Rey, Robert. Lettre(s) ; Reybaud, Mme O.. Lettre(s) ; Reymond, Mme C.. Carte(s) ; Reymond, Henri. Lettre(s) ; Rey-Roize, Comte J. de. Lettre(s) ; Riancey, Henry Camusat de. Lettre(s) ; Ribeyre, Félix. Lettre(s) ; Ricard, Docteur A., professeur à la Faculté de Médecine. Carte(s) ; Richard, Gaston-Ch.. Lettre(s) ; Richard, Pierre, député. Carte(s) ; Richard, Renée, de l'Opéra. Carte(s) ; Richebourg, Émile, romancier. Lettre(s) ; Richelot, Docteur L.-Gustave. Carte(s) ; Richepin, Jean, poète. Lettre(s) ; Richet, Docteur Charles. Lettre(s) ; Ricord, Docteur Philippe. Lettre(s) ; Riga, A.. Lettre(s) ; Rim, Carlo, écrivain. Lettre(s) ; Riou, Édouard, peintre. Lettre(s) ; Clément de Ris, Louis Torterat, par adoption Comte, écrivain. Lettre(s) ; Ritter-Ciampi, Cécile, cantatrice. Lettre(s) ; Risler, Édouard, pianiste. Lettre(s) ; Rivet, Gustave, homme politique. Lettre(s) ; Arnous de Rivière, Jules, écrivain. Lettre(s) ; Rivière, Commandant Henri. Lettre(s) ; Rivière, Théodore-Louis-Auguste, sculpteur. Lettre(s) ; Robert, professeur d'escrime. Lettre(s) ; Robert, Clémence, romancière. Lettre(s) ; Robert-Fleury, Tony, peintre. Lettre(s) ; Rocha, Lucien. Lettre(s) ; Rochas d'Aiglun, Albert de. Lettre(s) ; Rochas, Charles. Carte(s) ; Rod, Édouard, romancier. Lettre(s) ; Rodays, Fernand de, journaliste. Lettre(s) reçue(s) ; Rodays, Fernand de, journaliste. Lettre(s) ; Rodenbach, Mme Georges. Lettre(s) ; Rodin, Auguste, sculpteur. Lettre(s) ; Rogeard, Auguste. Lettre(s) ; Roger, Gustave. Lettre(s) ; Roger, Victor, compositeur. Lettre(s) ; Beauvoir, Édouard Roger de Bully dit Roger de, écrivain. Lettre(s) ; Beauvoir, Édouard Roger de Bully dit Roger de, écrivain. Document(s) le concernant ; Beauvoir, Henri Roger de. Lettre(s) ; Roger-Marx, Claude, écrivain. Lettre(s) ; Roger-Milès, Léon-Octave-Jean Roger dit . Lettre(s) ; Rohan-Chabot, Comte G. de. Lettre(s) ; Roland-Gosselin, Monseigneur Benjamin-Octave. Lettre(s) ; Roll, Alfred-Philippe, peintre. Lettre(s) ; Rolle, Hippolyte, critique. Lettre(s) ; Rollinat, Maurice, poète. Lettre(s) ; Römer, Elisabeth, cantatrice. Lettre(s) ; Romieu, Auguste. Caricature ; Rops, Félicien, peintre-graveur. Lettre(s) ; Rosalbin, peintre. Carte(s) ; Rouchon, M. et Mme. Carte(s) ; Rosenwald, Victor, écrivain. Lettre(s) ; Sontag, Henriette, comtesse Rossi, cantatrice. Note(s) biographique(s) ; Rossini, Gioacchino, compositeur. Lettre(s) ; Rostand, Eugène, économiste. Lettre(s) ; Rothschild, Baronne Salomon de. Lettre(s) ; Roty, Oscar, sculpteur. Lettre(s) ; Rouanet, Gustave, député. Lettre(s) ; Rouen, A., ingénieur. Lettre(s) ; Roujon, Henry, membre de l'Institut. Lettre(s) ; Rousseau, Jean, critique d'art. Lettre(s) ; Rousseau, Philippe, peintre. Lettre(s) ; Rousseau, Théodore, peintre. Lettre(s) ; Rousseil (Mme), artiste dramatique. Lettre(s) ; Roussel, Auguste, rédacteur de L'Univers. Lettre(s) ; Rousset, Ildefonse. Lettre(s) ; Ouin, A.. Carte(s) ; Roybet, Ferdinand, peintre-graveur. Lettre(s) ; Royer, Alphonse, auteur dramatique. Lettre(s) ; Royer, Clémence. Photo ; Royer, Clémence. Lettre(s) ; Royère, Jean. Lettre(s) ; Rôze, Marie Ponsin, dite, chanteuse. Lettre(s) ; Rubé, Alfred. Lettre(s) ; Rubens, Thérèse. Lettre(s)Numérisation effectuée à partir d'un document original