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  • 1
    Keywords: mass movements ; subaqueous landslides ; geohazards
    Description / Table of Contents: Advancing from subaqueous mass movement case studies to providing advice and mitigation / D. Gwyn Lintern, David C. Mosher and Martin Scherwath / Geological Society, London, Special Publications, 477, 1-14, 21 June 2019, https://doi.org/10.1144/SP477-2018-190 --- Tectonics and mass movements --- The nature of small to medium earthquakes along the Eastern Mediterranean passive continental margins, and their possible relationships to landslides and submarine salt-tectonic-related shallow faults / Oded Katz and Yariv Hamiel / Geological Society, London, Special Publications, 477, 15-22, 6 March 2018, https://doi.org/10.1144/SP477.5 --- Spatial and temporal cross-cutting relationships between fault structures and slope failures along the outer Kumano Basin and Nankai accretionary wedge, SW Japan / J. K. Lackey, G. F. Moore, M. Strasser, A. Kopf and C. S. Ferreira / Geological Society, London, Special Publications, 477, 23-36, 6 March 2018, https://doi.org/10.1144/SP477.10 --- Evidence for surface sediment remobilization by earthquakes in the Nankai forearc region from sedimentary records / Natsumi Okutsu, Juichiro Ashi, Asuka Yamaguchi, Tomohisa Irino, Ken Ikehara, Toshiya Kanamatsu, Yusuke Suganuma and Masafumi Murayama / Geological Society, London, Special Publications, 477, 37-45, 27 March 2018, https://doi.org/10.1144/SP477.22 --- Slope failures along the deformation front of the Cascadia margin: linking slide morphology to subduction zone parameters / Michael Riedel, Michelle M. Côté, Morelia Urlaub, Jacob Geersen, Nastasja A. Scholz, Kathrin Naegeli and George D. Spence / Geological Society, London, Special Publications, 477, 47-67, 27 April 2018, https://doi.org/10.1144/SP477.33 --- Slope failure and mass transport processes along the Queen Charlotte Fault, southeastern Alaska / Daniel S. Brothers, Brian D. Andrews, Maureen A. L. Walton, H. Gary Greene, J. Vaughn Barrie, Nathan C. Miller, Uri ten Brink, Amy E. East, Peter J. Haeussler, Jared W. Kluesner and James E. Conrad / Geological Society, London, Special Publications, 477, 69-83, 21 May 2018, https://doi.org/10.1144/SP477.30 --- Slope failure and mass transport processes along the Queen Charlotte Fault Zone, western British Columbia / H. Gary Greene, J. Vaughn Barrie, Daniel S. Brothers, James E. Conrad, Kim Conway, Amy E. East, Randy Enkin, Katherine L. Maier, Stuart P. Nishenko, Maureen A. L. Walton and Kristin M. M. Rohr / Geological Society, London, Special Publications, 477, 85-106, 24 May 2018, https://doi.org/10.1144/SP477.31 --- Mass-wasting processes along the margins of the Ulleung Basin, East Sea: insights from multichannel seismic reflection and multibeam echosounder data / Senay Horozal, Jang-Jun Bahk, Sang Hoon Lee, Deniz Cukur, Roger Urgeles, Gil Young Kim, Seong-Pil Kim, Byong-Jae Ryu and Jin-Ho Kim / Geological Society, London, Special Publications, 477, 107-119, 30 April 2018, https://doi.org/10.1144/SP477.18 --- Assessment of the effect of mass-transport deposits on fault propagation in Penobscot area, offshore Nova Scotia / Tuviere Omeru, Samson I. Bankole, Byami A. Jolly, Obafemi S. Seyi and Joses B. Omojola / Geological Society, London, Special Publications, 477, 121-131, 27 March 2018, https://doi.org/10.1144/SP477.23 --- Open-slope, translational submarine landslide in a tectonically active volcanic continental margin (Licosa submarine landslide, southern Tyrrhenian Sea) / M. Sammartini, A. Camerlenghi, F. Budillon, D. D. Insinga, F. Zgur, A. Conforti, M. Iorio, R. Romeo and R. Tonielli / Geological Society, London, Special Publications, 477, 133-150, 24 May 2018, https://doi.org/10.1144/SP477.34 --- Mass transport deposits, fluid flow and gas hydrates in passive margins --- Mass wasting along the NW African continental margin / S. Krastel, W. Li, M. Urlaub, A. Georgiopoulou, R. B. Wynn, T. Schwenk, C. Stevenson and P. Feldens / Geological Society, London, Special Publications, 477, 151-167, 23 May 2018, https://doi.org/10.1144/SP477.36 --- Subsurface controls on the development of the Cape Fear Slide Complex, central US Atlantic Margin / Jenna C. Hill, Daniel S. Brothers, Matthew J. Hornbach, Derek E. Sawyer, Donna J. Shillington and Anne Bécel / Geological Society, London, Special Publications, 477, 169-181, 28 March 2018, https://doi.org/10.1144/SP477.17 --- Repeated large-scale mass-transport deposits and consequent rapid sedimentation in the western part of the Bay of Bengal, India / Yuzuru Yamamoto, Shun Chiyonobu, Toshiya Kanamatsu, Naokazu Ahagon, Kan Aoike, Nana Kamiya, Takanori Ojima, Takehiro Hirose, Takamitsu Sugihara, Saneatsu Saito, Masataka Kinoshita, Yusuke Kubo, Yasuhiro Yamada and NGHP-02 Scientists / Geological Society, London, Special Publications, 477, 183-193, 28 March 2018, https://doi.org/10.1144/SP477.12 --- Giant mass-transport deposits in the southern Scotia Sea (Antarctica) / Luis Somoza, Teresa Medialdea and Francisco J. González / Geological Society, London, Special Publications, 477, 195-205, 6 March 2018, https://doi.org/10.1144/SP477.2 --- Submarine landslides offshore Yamba, NSW, Australia: an analysis of their timing, downslope motion and possible causes / Thomas Hubble, Serena Yeung, Samantha Clarke, Alan Baxter and Fabio De Blasio / Geological Society, London, Special Publications, 477, 207-222, 30 April 2018, https://doi.org/10.1144/SP477.11 --- Mass transport deposits in modern and outcrop sedimentology --- Entrainment and abrasion of megaclasts during submarine landsliding and their impact on flow behaviour / D. M. Hodgson, H. L. Brooks, A. Ortiz-Karpf, Y. Spychala, D. R. Lee and C. A.-L. Jackson / Geological Society, London, Special Publications, 477, 223-240, 28 March 2018, https://doi.org/10.1144/SP477.26 --- Preferential formation of a slide plane in translational submarine landslide deposits in a Pleistocene forearc basin fill exposed in east-central Japan / Masayuki Utsunomiya, Atsushi Noda and Makoto Otsubo / Geological Society, London, Special Publications, 477, 241-253, 23 March 2018, https://doi.org/10.1144/SP477.3 --- Formation of excess fluid pressure, sediment fluidization and mass-transport deposits in the Plio-Pleistocene Boso forearc basin, central Japan / Nana Kamiya, Masayuki Utsunomiya, Yuzuru Yamamoto, Junichi Fukuoka, Feng Zhang and Weiren Lin / Geological Society, London, Special Publications, 477, 255-264, 26 March 2018, https://doi.org/10.1144/SP477.20 --- Stratal architecture and evolution of a slope mass-transport complex, Isaac Formation, Neoproterozoic Windermere Supergroup, southern Canadian Cordillera, British Columbia, Canada / Lilian Navarro and R. William C. Arnott / Geological Society, London, Special Publications, 477, 265-276, 3 May 2018, https://doi.org/10.1144/SP477.24 --- Tsunami risk assessment --- Extending the terrestrial depositional record of marine geohazards in coastal NW British Columbia / David Huntley, Peter Bobrowsky, James Goff, Catherine Chagué, Douglas Stead, Davide Donati and Danial Mariampillai / Geological Society, London, Special Publications, 477, 277-292, 27 March 2018, https://doi.org/10.1144/SP477.4 --- Tsunami modelling of the 7250 cal years BP Betsiamites submarine landslide / Dominique Turmel, Jacques Locat, Jonathan Leblanc and Geneviève Cauchon-Voyer / Geological Society, London, Special Publications, 477, 293-301, 6 March 2018, https://doi.org/10.1144/SP477.9 --- Bulgarian tsunami on 7 May 2007: numerical investigation of the hypothesis of a submarine-landslide origin / Oleg I. Gusev, Gayaz S. Khakimzyanov and Leonid B. Chubarov / Geological Society, London, Special Publications, 477, 303-313, 23 March 2018, https://doi.org/10.1144/SP477.6 --- Modelling the 1929 Grand Banks slump and landslide tsunami / Finn Løvholt, Irena Schulten, David Mosher, Carl Harbitz and Sebastian Krastel / Geological Society, London, Special Publications, 477, 315-331, 17 April 2018, https://doi.org/10.1144/SP477.28 --- Failure and post-failure analysis of submarine mass movements using geomorphology and geomechanical concepts / Jacques Locat / Geological Society, London, Special Publications, 477, 333-351, 30 April 2018, https://doi.org/10.1144/SP477.27 --- SPLASH: semi-empirical prediction of landslide-generated displacement wave run-up heights / Thierry Oppikofer, Reginald L. Hermanns, Nicholas J. Roberts and Martina Böhme / Geological Society, London, Special Publications, 477, 353-366, 17 March 2018, https://doi.org/10.1144/SP477.1 --- Assessments of subaqueous mass movements in labs, lakes, fjords and coastal areas --- Morphological characterization of submarine slope failures in a semi-enclosed fjord, Frobisher Bay, eastern Canadian Arctic / Robert Deering, Trevor Bell, Donald L. Forbes, Calvin Campbell and Evan Edinger / Geological Society, London, Special Publications, 477, 367-376, 24 May 2018, https://doi.org/10.1144/SP477.35 --- New evidence for a major late Quaternary submarine landslide on the external western levee of Laurentian Fan / Alexandre Normandeau, D. Calvin Campbell, David J. W. Piper and Kimberley A. Jenner / Geological Society, London, Special Publications, 477, 377-387, 28 March 2018, https://doi.org/10.1144/SP477.14 --- Failure dynamics of landslide scars on the lower continental slope of the Tyrrhenian Calabrian margin: insights from an integrated morpho-bathymetric and seismic analysis / Daniele Casalbore, Eleonora Martorelli, Alessandro Bosman, Eleonora Morelli and Francesco Latino Chiocci / Geological Society, London, Special Publications, 477, 389-397, 23 March 2018, https://doi.org/10.1144/SP477.16 --- Quantitative characterization of subaqueous landslides in Lake Zurich (Switzerland) based on a high-resolution bathymetric dataset / M. Strupler, F. S. Anselmetti, M. Hilbe and M. Strasser / Geological Society, London, Special Publications, 477, 399-412, 6 March 2018, https://doi.org/10.1144/SP477.7 --- Tsunami hazard from lacustrine mass wasting in Lake Tekapo, New Zealand / Joshu J. Mountjoy, Xiaoming Wang, Susi Woelz, Sean Fitzsimons, Jamie D. Howarth, Alan R. Orpin and William Power / Geological Society, London, Special Publications, 477, 413-426, 27 April 2018, https://doi.org/10.1144/SP477.21 --- Sediment mass movement of a particle-laden turbidity current based on ultrasound velocity profiling and the distribution of sediment concentration / Shun Nomura, Jumpei Hitomi, Giovanni De Cesare, Yasushi Takeda, Yuzuru Yamamoto and Hide Sakaguchi / Geological Society, London, Special Publications, 477, 427-437, 3 May 2018, https://doi.org/10.1144/SP477.19 --- A two-dimensional layer-averaged numerical model for turbidity currents / Shihao Yang, Yi An and Qingquan Liu / Geological Society, London, Special Publications, 477, 439-454, 23 May 2018, https://doi.org/10.1144/SP477.32 --- Policy, classification and providing advice for mitigation --- A consistent global approach for the morphometric characterization of subaqueous landslides / Michael Clare, Jason Chaytor, Oliver Dabson, Davide Gamboa, Aggeliki Georgiopoulou, Harry Eady, James Hunt, Christopher Jackson, Oded Katz, Sebastian Krastel, Ricardo León, Aaron Micallef, Jasper Moernaut, Roberto Moriconi, Lorena Moscardelli, Christof Mueller, Alexandre Normandeau, Marco Patacci, Michael Steventon, Morelia Urlaub, David Völker, Lesli Wood and Zane Jobe / Geological Society, London, Special Publications, 477, 455-477, 28 March 2018, https://doi.org/10.1144/SP477.15 --- Seismic and lithofacies characterization of a gravity core transect down the submarine Tuaheni Landslide Complex, NE New Zealand / Jannis Kuhlmann, Alan R. Orpin, Joshu J. Mountjoy, Gareth J. Crutchley, Stuart Henrys, Ryan Lunenburg and Katrin Huhn / Geological Society, London, Special Publications, 477, 479-495, 31 July 2018, https://doi.org/10.1144/SP477.37 --- Submarine landslide catalogue onshore/offshore harmonization: Spain as a case study / Ricardo León, Juan Carlos García-Davalillo, David Casas and Carmen Julia Giménez-Moreno / Geological Society, London, Special Publications, 477, 497-510, 31 July 2018, https://doi.org/10.1144/SP477.38 --- Combining in situ monitoring using seabed instruments and numerical modelling to assess the transient stability of underwater slopes / Morelia Urlaub and Heinrich Villinger / Geological Society, London, Special Publications, 477, 511-521, 6 March 2018, https://doi.org/10.1144/SP477.8 --- Effects of stress on failure behaviour of shallow-marine muds from the northern Gulf of Mexico / Brandon Dugan and Xin Zhao / Geological Society, London, Special Publications, 477, 523-536, 27 April 2018, https://doi.org/10.1144/SP477.13 --- Shear margin moraine, mass transport deposits and soft beds revealed by high-resolution P-Cable three-dimensional seismic data in the Hoop area, Barents Sea / Benjamin Bellwald and Sverre Planke / Geological Society, London, Special Publications, 477, 537-548, 28 March 2018, https://doi.org/10.1144/SP477.29 --- Geohazard assessment related to submarine instabilities in Bjørnafjorden, Norway / Brian Carlton, Maarten Vanneste, Carl Fredrik Forsberg, Siren Knudsen, Finn Løvholt, Tore Kvalstad, Søren Holm, Heidi Kjennbakken, Muhammad Adeel Mazhar, Samson Degago and Haflidi Haflidason / Geological Society, London, Special Publications, 477, 549-566, 31 July 2018, https://doi.org/10.1144/SP477.39 --- Providing multidisciplinary scientific advice for coastal planning in Kitimat Arm, British Columbia / Gwyn Lintern, Andrée Blais-Stevens, Cooper Stacey, John Shaw, Peter Bobrowsky, Kim Conway, David Huntley, Kevin Mackillop, Irina Overeem and Martin Scherwath / Geological Society, London, Special Publications, 477, 567-581, 16 April 2019, https://doi.org/10.1144/SP477.40 --- Surficial sediment failures due to the 1929 Grand Banks Earthquake, St Pierre Slope / Irena Schulten, David C. Mosher, Sebastian Krastel, David J. W. Piper and Markus Kienast / Geological Society, London, Special Publications, 477, 583-596, 3 May 2018, https://doi.org/10.1144/SP477.25
    Pages: Online-Ressource (IX, 609 Seiten) , Illustrationen, Diagramme
    ISBN: 9781786203823
    Language: English
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  • 2
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    PANGAEA
    In:  Supplement to: Römer, Miriam; Riedel, Michael; Scherwath, Martin; Heesemann, Martin; Spence, George D (2016): Tidally controlled gas bubble emissions: A comprehensive study using long-term monitoring data from the NEPTUNE cabled observatory offshore Vancouver Island. Geochemistry, Geophysics, Geosystems, 17(9), 3797-3814, https://doi.org/10.1002/2016GC006528
    Publication Date: 2023-11-25
    Description: Long-term monitoring over 1 year revealed high temporal variability of gas emissions at a cold seep in 1250 m water depth offshore Vancouver Island, British Columbia. Data from the North East Pacific Time series Underwater Networked Experiment observatory operated by Ocean Networks Canada were used. The site is equipped with a 260 kHz Imagenex sonar collecting hourly data, conductivity-temperature-depth sensors, bottom pressure recorders, current meter, and an ocean bottom seismograph. This enables correlation of the data and analyzing trigger mechanisms and regulating criteria of gas discharge activity. Three periods of gas emission activity were observed: (a) short activity phases of few hours lasting several months, (b) alternating activity and inactivity of up to several day-long phases each, and (c) a period of several weeks of permanent activity. These periods can neither be explained by oceanographic conditions nor initiated by earthquakes. However, we found a clear correlation of gas emission with bottom pressure changes controlled by tides. Gas bubbles start emanating during decreasing tidal pressure. Tidally induced pressure changes also influence the subbottom fluid system by shifting the methane solubility resulting in exsolution of gas during falling tides. These pressure changes affect the equilibrium of forces allowing free gas in sediments to emanate into the water column at decreased hydrostatic load. We propose a model for the fluid system at the seep, fueled by a constant subsurface methane flux and a frequent tidally controlled discharge of gas bubbles into the ocean, transferable to other gas emission sites in the world's oceans.
    Keywords: Azimuth; Center for Marine Environmental Sciences; CT; DATE/TIME; Distance; LATITUDE; LONGITUDE; Magnitude; MARUM; NEPTUNE; off west coast of Vancouver Island, British Columbia; Time delay; Underway cruise track measurements
    Type: Dataset
    Format: text/tab-separated-values, 1075 data points
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  • 3
    Publication Date: 2021-12-14
    Description: Extreme events have long been underestimated in the extent to which they shape the surface of our planet, our environment, its ecological integrity, and the sustainability of human society. Extreme events are by definition rarely observed, of significant impact and, as a result of their spatiotemporal range, not always easily predicted. Extremes may be short-term catastrophic events such as tsunamis, or long-term evolving events such as those linked to climate change; both modify the environment, producing irreversible changes or regime shifts. Whatever the driver that triggers the extreme event, the damages are often due to a combination of several processes and their impacts can affect large areas with secondary events (domino effect), whose effects in turn may persist well beyond the duration of the trigger event itself. Early studies of extreme events were limited to opportunistic approaches: observations were made within the context of naturally occurring events with high societal impact. Given that climate change is now moving us out of a relatively static climate regime during the development of human civilization, extreme events are now a function of underlying climate shifts overlain by catastrophic processes. Their impacts are often due to synergistic factors, all relevant in understanding process dynamics; therefore, an integrated methodology has become essential to enhance the reliability of new assessments and to develop strategies to mitigate societal impacts. Here we summarize the current state of extreme event monitoring in the marine system, highlighting the advantages of a multidisciplinary approach using Research Infrastructures for providing the temporal and spatial resolution required to monitor Earth processes and enhance assessment of associated impacts.
    Description: Published
    Description: 626668
    Description: 3A. Geofisica marina e osservazioni multiparametriche a fondo mare
    Description: JCR Journal
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 4
    Publication Date: 2016-09-16
    Description: Long-term monitoring over one year revealed high temporal variability of gas emissions at a cold seep in 1250 m water depth offshore Vancouver Island, British Columbia. Data from the North East Pacific Time series Underwater Networked Experiment observatory operated by Ocean Networks Canada were used. The site is equipped with a 260 kHz Imagenex sonar collecting hourly data, conductivity-temperature-depth sensors, bottom pressure recorders, current meter, and an ocean bottom seismograph. This enables correlation of the data and analyzing trigger mechanisms and regulating criteria of gas discharge activity. Three periods of gas emission activity were observed: (a) short activity phases of few hours lasting several months, (b) alternating activity and inactivity of up to several day-long phases each, and (c) a period of several weeks of permanent activity. These periods can neither be explained by oceanographic conditions nor initiated by earthquakes. However, we found a clear correlation of gas emission with bottom pressure changes controlled by tides. Gas bubbles start emanating during decreasing tidal pressure. Tidally induced pressure changes also influence the subbottom fluid system by shifting the methane solubility resulting in exsolution of gas during falling tides. These pressure changes affect the equilibrium of forces allowing free gas in sediments to emanate into the water column at decreased hydrostatic load. We propose a model for the fluid system at the seep, fueled by a constant sub-surface methane flux and a frequent tidally controlled discharge of gas bubbles into the ocean, transferable to other gas emission sites in the world's oceans. This article is protected by copyright. All rights reserved.
    Electronic ISSN: 1525-2027
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 5
    Publication Date: 2020-05-25
    Description: Deep-sea environmental datasets are ever-increasing in size and diversity, as technological advances lead monitoring studies towards long-term, high-frequency data acquisition protocols. This study presents examples of pre-analysis data treatment steps applied to the environmental time series collected by the Internet Operated Deep-sea Crawler “Wally” during a 7-year deployment (2009–2016) in the Barkley Canyon methane hydrates site, off Vancouver Island (BC, Canada). Pressure, temperature, electrical conductivity, flow, turbidity, and chlorophyll data were subjected to different standardizing, normalizing, and de-trending methods on a case-by-case basis, depending on the nature of the treated variable and the range and scale of the values provided by each of the different sensors. The final pressure, temperature, and electrical conductivity (transformed to practical salinity) datasets are ready for use. On the other hand, in the cases of flow, turbidity, and chlorophyll, further in-depth processing, in tandem with data describing the movement and position of the crawler, will be needed in order to filter out all possible effects of the latter. Our work evidences challenges and solutions in multiparametric data acquisition and quality control and ensures that a big step is taken so that the available environmental data meet high quality standards and facilitate the production of reliable scientific results.
    Electronic ISSN: 1424-8220
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
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  • 6
    Publication Date: 2014-11-18
    Description: Offshore seismicity at the Cascadia margin is poorly constrained because nearly all previous recordings of earthquakes were made using land‐based networks. We conducted earthquake monitoring off Vancouver Island in northern Cascadia using ocean‐bottom seismographs. Our results show that most of the offshore seismicity is concentrated along the Nootka fault zone. Otherwise seismicity is extremely low, with no earthquakes located along the shallow, seismogenic part of the megathrust. The lack of interplate seismicity may indicate complete healing and locking of the megathrust over three centuries after the great earthquake of 1700 and a somewhat lower degree of structure heterogeneity, such as subducting seamounts. Events along the Nootka fault zone occur over a 10–15 km depth range. This wide distribution and the previously reported overall moment release rate suggest that a significant part of deformation of this fault zone is aseismic. Several earthquakes beneath the continental shelf may be related to faults dividing tectonic terrains within the overriding plate.
    Print ISSN: 0037-1106
    Electronic ISSN: 1943-3573
    Topics: Geosciences , Physics
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  • 7
    Publication Date: 2003-01-01
    Print ISSN: 0148-0227
    Electronic ISSN: 2156-2202
    Topics: Geosciences
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    Publication Date: 2019-01-01
    Print ISSN: 0305-8719
    Electronic ISSN: 2041-4927
    Topics: Geosciences
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