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| Registros recuperados: 10 | |
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| 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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| Dan, Gabriela; Sultan, Nabil; Savoye, Bruno; Deverchere, Jacques; Yelles, Karim. |
| The Algerian margin is a seismically active region, where during the last century, several large magnitude earthquakes took place. This study combines geotechnical and sedimentological data with numerical modelling to quantitatively assess the present-day slope stability of the Algerian margin. Geotechnical laboratory tests, such as cyclic triaxial tests, oedometric tests and vane shear tests were carried out on sediment cores collected on the study area. The liquefaction potential of a sediment column located about 30 km from the BoumerdSs earthquake epicentre of 21st May 2003 was evaluated theoretically for an earthquake of M (w) = 6.8. We show that thin sand and silt beds such as those described on recovered sediment cores are the main cause of sediment... |
| Tipo: Text |
Palavras-chave: Earthquakes; Potential of liquefaction; Slope stability; Algerian margin. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6448.pdf |
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| Ablain, Michaël; Dorandeu, Joël; Le Traon, Pierre-yves; Sladen, Anthony. |
| The Indian Ocean tsunami, which occurred on December 26, 2004, was the first to be clearly observed using satellite altimeters. The wave amplitude observed in deep-ocean by TOPEX and Jason-1 was close to 60 cm about 2 hours after the earthquake. Envisat crossed the tsunami wave 3h15 after the earthquake and measured a 35 cm wave. Even though it flew over the tsunami 7h20 after the earthquake, GFO still observed a wave close to 20 cm. To better extract the tsunami signal from altimeter measurements, a specific ocean variability mapping technique is used. This technique proves to be mandatory for discriminating tsunami waves from other ocean signals. Altimeter signals are then compared with those derived from the CEA (Commissariat à l'Energie Atomique) model... |
| Tipo: Text |
Palavras-chave: Wave analysis; Tsunamis; Earthquakes; Sea level changes; Satellite altimetry. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1174.pdf |
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| Gasperini, Luca; Stucchi, Massimiliano; Cedro, Vincenzo; Meghraoui, Mustapha; Ucarkus, Gulsen; Polonia, Alina. |
| A new analysis of high-resolution multibeam and seismic reflection data, collected during several oceanographic expeditions starting from 1999, allowed us to compile an updated morphotectonic map of the North Anatolian Fault below the Sea of Marmara. We reconstructed kinematics and geometries of individual fault segments, active at the time scale of 10 ka, an interval which includes several earthquake cycles, taking as stratigraphic marker the base of the latest marine transgression. Given the high deformation rates relative to sediment supply, most active tectonic structures have a morphological expression at the seafloor, even in presence of composite fault geometries and/or overprinting due to mass-wasting or turbidite deposits. In the frame of the... |
| Tipo: Text |
Palavras-chave: North Anatolian fault; Sea of Marmara; Earthquakes; Active fault segments; Marine geophysics; Seismic hazard. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00684/79575/82244.pdf |
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| Espinoza, J.. |
| Se analizan datos de los sísmos ocurridos en el Ecuador desde 1901 a 1981 que aparecen principalmente en el Catálogo CERESIS. Ciento veinticinco sísmos de magnitud Ms>4, se han producido en la plataforma y en el continente, el 65% de todos los hepicentros fueron superficiales, es decir, que se produjeron a profundidades menores de 70 Km: las profundidades hipocentrales menores a 50 Km., se ubican preferentemente en la región de la plataforma submarina y sus magnitudes varían entre 6.5 y 8.7 en la escala de Richer. Cinco símos generaron tsunamis en los años 1906, 1933, 1953, 1958 y 1979. Se encontró que los daños ocurridos en las costas ecuatorianas han sido mínimos debido a su poco desarrollo hasta 1960, o debido a otros factores como la ocurrencia del... |
| Tipo: Journal Contribution |
Palavras-chave: Earthquakes; Tsunamis; Earthquakes; Http://aims.fao.org/aos/agrovoc/c_2440. |
| Ano: 1992 |
URL: http://hdl.handle.net/1834/2181 |
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| Este documento relata la experiencia de personas que sobrevivieron a uno de los más devastadores tsunamis del siglo XX: el maremoto chileno de 1960. Esta catástrofe no sólo afectó a los habitantes del centro sur de Chile, sino que también a los residentes de las costas de Hawaii y Japón, al otro lado del océano Pacífico. De las experiencias relatadas por las personas que enfrentaron el tsunami del 22 de mayo de 1960, se extrae un conjunto de lecciones respecto de a cómo actuar frente a un tsunami, acciones que permitieron salvar vidas, así como los comportamientos que conllevaron la pérdida de éstas. |
| Tipo: Book |
Palavras-chave: Tsunamis; Earthquakes; Disasters; Earthquakes; Disasters; Http://aims.fao.org/aos/agrovoc/c_2440; Http://aims.fao.org/aos/agrovoc/c_5082. |
| Ano: 2000 |
URL: http://hdl.handle.net/1834/1575 |
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| Haerdle, Wolfgang; Cabrera, Brenda Lopez. |
| The study of natural catastrophe models plays an important role in the prevention and mitigation of disasters. After the occurrence of a natural disaster, the reconstruction can be financed with catastrophe bonds (CAT bonds) or reinsurance. This paper examines the calibration of a real parametric CAT bond for earthquakes that was sponsored by the Mexican government. The calibration of the CAT bond is based on the estimation of the intensity rate that describes the earthquake process from the two sides of the contract, the reinsurance and the capital markets, and from the historical data. The results demonstrate that, under specific conditions, the financial strategy of the government, a mix of reinsurance and CAT bond, is optimal in the sense that it... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: CAT bonds; Reinsurance; Earthquakes; Doubly Stochastic Poisson Process; Trigger mechanism; Risk and Uncertainty. |
| Ano: 2007 |
URL: http://purl.umn.edu/9265 |
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| Registros recuperados: 10 | |
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