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Registros recuperados: 11
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A geomechanical approach for the genesis of sediment undulations on the Adriatic shelf - art. no. Q04R03 ArchiMer
Sultan, Nabil; Cattaneo, Antonio; Urgeles, R; Lee, H; Locat, J; Trincardi, F; Berne, Serge; Canals, M; Lafuerza, S.
This study is among the first to examine the genesis of the seafloor and subsurface undulations on the Adriatic continental shelf by integrating stratigraphic information and in situ and laboratory geotechnical measurements. Interpretation of sediment behavior is based on a 32-m-long borehole crossing ( 1) a possible shear plane and ( 2) a silty clay layer at about 20 m below seafloor (mbsf) on which sediment undulations are rooted and could be interpreted as a potential weak layer succession. Our main results in terms of triggering mechanism for the observed undulations show that under an earthquake, liquefaction and/or failure of the silty-clay sediments ( weak layer) leading to deformation of the upper more cohesive sediments is possible only when such...
Tipo: Text Palavras-chave: Sediment deformation; Shear strength; Earthquake; Adriatic shelf.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-4105.pdf
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Causes of earthquake spatial distribution beneath the Izu-Bonin-Mariana Arc ArchiMer
Kong, Xiangchao; Li, Sanzhong; Wang, Yongming; Suo, Yanhui; Dai, Liming; Geli, Louis; Zhang, Yong; Guo, Lingli; Wang, Pengcheng.
Statistics about the occurrence frequency of earthquakes (1973-2015) at shallow, intermediate and great depths along the Izu-Bonin-Mariana (IBM) Arc is presented and a percent perturbation relative to P-wave mean value (LLNL-G3Dv3) is adopted to show the deep structure. The correlation coefficient between the subduction rate and the frequency of shallow seismic events along the IBM is 0.605, proving that the subduction rate is an important factor for shallow seismic events. The relationship between relief amplitudes of the seafloor and earthquake occurrences implies that some seamount chains riding on the Pacific seafloor may have an effect on intermediate-depth seismic events along the IBM. A probable hypothesis is proposed that the seamounts or...
Tipo: Text Palavras-chave: Philippine Sea Plate; Pacific Plate; Earthquake; Seamount; Slab tear; Subduction rate.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00407/51828/52427.pdf
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Day of Destruction: Survival and Stewardship in the Haiti Earthquake (PowerPoint) AgEcon
Bahn, Henry M..
Presented to USDA Economists Group, Washington, DC, March 10, 2010
Tipo: Conference Paper or Presentation Palavras-chave: Haiti; Earthquake; Health Economics and Policy; Institutional and Behavioral Economics.
Ano: 2010 URL: http://purl.umn.edu/59494
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Deep sea in situ excess pore pressure and sediment deformation off NW Sumatra and its relation with the December 26, 2004 Great Sumatra-Andaman Earthquake ArchiMer
Sultan, Nabil; Cattaneo, Antonio; Sibuet, Jean-claude; Schneider, Jean-luc.
The swath bathymetric data acquired during the "Sumatra Aftershocks" cruise from the Sunda trench in the Indian Ocean to the north of the Sumatra Island imaged several scars and deposits. In situ pore pressure measurements using the Ifremer piezometer and coring demonstrate that high excess pore pressure and sediment deformation was generated by a recent event in the scar of the slope failure zone identified by J.T. Henstock and co-authors. This excess pore pressure is localized in the upper sedimentary layers and is not related to an interplate subduction process. Numerical simulations of the hydrological system that take into account the hydro-mechanical properties of the upper sediment layer show that the excess pore pressure and sediment deformations...
Tipo: Text Palavras-chave: Tsunami; Sumatra; Slope failure; Pore pressure; Earthquake.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6740.pdf
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Evidence of a recent magma dike intrusion at the slow spreading Lucky Strike segment, Mid-Atlantic Ridge - art. no. B12102 ArchiMer
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
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Rethinking Resilience: Reflections on the Earthquakes in Christchurch, New Zealand, 2010 and 2011 Ecology and Society
Hayward, Bronwyn Mary; School of Social and Political Sciences, University of Canterbury, New Zealand; Sustainable Lifestyles Research Group, University of Surrey, UK; Voices of the Future, University of Oslo, Norway; bronwyn.hayward@canterbury.ac.nz.
Resilience has emerged as a policy response in an era of public concern about disasters and risks that include fear of terrorism and environmental or economic catastrophe. Resilience is both a refreshing and a problematic concept. It is refreshing in that it creates new opportunities for interdisciplinary research and vividly reminds us that the material world matters in our social lives, political economy, and urban planning. However, the concept of resilience is also problematic. Widespread, uncritical calls for greater resilience in response to environmental, economic, and social challenges often obscure significant questions of political power. In particular, we may ask, resilience of what, and for whom? My reflection here was written in the...
Tipo: Peer-Reviewed article Palavras-chave: Citizenship; Earthquake; Political agency; Resilience social justice.
Ano: 2013
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Succession and growth strategy of a spring microbial community from kezhou sinter in China BJM
Yang,Hongmei; Lou,Kai.
The succession and growth strategy of a spring microbial community under earthquake action were investigated. The majority of pre-earthquake isolates belonged to the Gammaproteobacteria, including two numerically dominant Stenotrophomonas sp. RB25 and Acinetobacter sp. RB11 (r-strategists). The predominant post-earthquake isolates were Alphaproteobacteria, with Rhizobium sp. RA42 (K-strategists) being dominant among these organisms.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Growth strategy; Succession; Spring microbe; Earthquake.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000100005
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Testing for the ‘predictability’ of dynamically triggered earthquakes in The Geysers geothermal field ArchiMer
Aiken, Chastity; Meng, Xiaofeng; Hardebeck, Jeanne.
The Geysers geothermal field is well known for being susceptible to dynamic triggering of earthquakes by large distant earthquakes, owing to the introduction of fluids for energy production. Yet, it is unknown if dynamic triggering of earthquakes is ‘predictable’ or whether dynamic triggering could lead to a potential hazard for energy production. In this paper, our goal is to investigate the characteristics of triggering and the physical conditions that promote triggering to determine whether or not triggering is in anyway foreseeable. We find that, at present, triggering in The Geysers is not easily ‘predictable’ in terms of when and where based on observable physical conditions. However, triggered earthquake magnitude positively correlates with peak...
Tipo: Text Palavras-chave: Dynamic triggering; Template matching; Earthquake; Stress changes; The Geysers.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00425/53626/54547.pdf
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The 2009 earthquake, magnitude mb 4.8, in the Pantanal Wetlands, west-central Brazil Anais da ABC (AABC)
DIAS,FÁBIO L.; ASSUMPÇÃO,MARCELO; FACINCANI,EDNA M.; FRANÇA,GEORGE S.; ASSINE,MARIO L.; PARANHOS FILHO,ANTÔNIO C.; GAMARRA,ROBERTO M..
ABSTRACT The main goal of this paper is to characterize the Coxim earthquake occurred in June 15th, 2009 in the Pantanal Basin and to discuss the relationship between its faulting mechanism with the Transbrasiliano Lineament. The earthquake had maximum intensity MM V causing damage in farm houses and was felt in several cities located around, including Campo Grande and Goiânia. The event had an mb 4.8 magnitude and depth was 6 km, i.e., it occurred in the upper crust, within the basement and 5 km below the Cenozoic sedimentary cover. The mechanism, a thrust fault mechanism with lateral motion, was obtained by P-wave first-motion polarities and confirmed by regional waveform modelling. The two nodal planes have orientations (strike/dip) of 300°/55° and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Earthquake; Neotectonics; Intraplate stress; Pantanal basin; Focal mechanism.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000401253
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Triggering mechanisms of slope instability processes and sediment failures on continental margins: a geotechnical approach ArchiMer
Sultan, Nabil; Cochonat, Pierre; Canals, M; Cattaneo, Antonio; Dennielou, Bernard; Haflidason, H; Laberg, J; Long, D; Mienert, J; Trincardi, F; Urgeles, R; Vorren, T; Wilson, C.
The Costa target areas exhibit the variability of slope instabilities needed to improve our understanding of sediment physical and mechanical properties in areas prone to sliding. That is why in this project, we have analysed the different slope failures events from different parts of the Costa target areas, which reflect diverse triggering mechanisms. The aim of the first part of this study was to identify the geotechnical response of the sediment to different external mechanisms (earthquake, rapid sedimentation and gas hydrate melting). We have focused on the relation between external mechanisms and the consequence change in the in-situ stress state and the physical, mechanical, and elastic properties of the sediment. In the second part of the paper, the...
Tipo: Text Palavras-chave: Slope instability; Sensitivity; Sedimentation; Hydrate; Earthquake.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/publication-700.pdf
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What do Haitians need after the earthquake? AgEcon
Andre, Rock; Lusk, Jayson L..
The earthquake that hit Haiti in the beginning of 2010 led to tremendous international solidarity in the recovery effort. Despite the tons of aid sent to Haiti, relatively little is known about the effectiveness of the aid or about the continuing needs of the Haitians. Using data collected from in-person surveys with over 1,000 Haitians, we sought to quantify some of the impacts of the earthquake while determining people’s relative preferences for food and other basic needs in the aftermath of the Haiti’s earthquake. The results indicate that almost two-thirds of Haitians lost a friend in the earthquake, and nearly half lost a family member. People report spending more on food in the aftermath of the earthquake, and the level of food aid received does not...
Tipo: Conference Paper or Presentation Palavras-chave: Best-worst scaling; Aid relief; Earthquake; Survey; Disaster; Haiti.; Consumer/Household Economics; Food Consumption/Nutrition/Food Safety.
Ano: 2011 URL: http://purl.umn.edu/98631
Registros recuperados: 11
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