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  • AGU (American Geophysical Union)  (29)
  • Wiley  (16)
  • PANGAEA  (3)
  • IFM-Geomar, Kiel  (2)
  • Kiel : GEOMAR, Helmholtz-Zentrum für Ozeanforschung Kiel  (2)
  • Blackwell Publishing Ltd
Document type
Keywords
Publisher
Language
Years
  • 1
    Online Resource
    Online Resource
    Tektonik und Morphologie des Kontinentalrandes vor Peru und Chile - bathymetrische Kartierungen während der biologischen Arbeiten : Sinnessysteme II ; SO209 ; Abschlussbericht (2012)
    Kiel : GEOMAR, Helmholtz-Zentrum für Ozeanforschung Kiel
    Details Availability
    Keywords: Forschungsbericht ; Peru ; Chile Nord ; Kontinentalrand ; Bathymetrie
    Type of Medium: Online Resource
    Pages: Online-Ressource (34 S., 32,13 MB) , graph. Darst., zahlr. Kt.
    URL: https://edocs.tib.eu/files/e01fb12/731511131.pdf
    URL: https://doi.org/10.2314/GBV:731511131
    URL: https://edocs.tib.eu/files/e01fb12/731511131l.pdf
    DOI: 10.2314/GBV:731511131
    Language: German
    Note: Förderkennzeichen BMBF 03G0209B. - Kartenanh. u.d.T.: Bathymetric chart of the South East Pacific , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden. - Auch als gedr. Ausg. vorh , Systemvoraussetzungen: Acrobat reader.
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    GEOMAR CATALOGUE
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  • 2
    Book
    Book
    Tektonik und Morphologie des Kontinentalrandes vor Peru und Chile - bathymetrische Kartierungen während der biologischen Arbeiten : Sinnessysteme II ; SO209 ; Abschlussbericht (2012)
    Kiel : GEOMAR, Helmholtz-Zentrum für Ozeanforschung Kiel
    Details Availability
    Keywords: Forschungsbericht ; Peru ; Chile Nord ; Kontinentalrand ; Bathymetrie
    Type of Medium: Book
    Pages: 8, 24Bl. , graph. Darst., zahlr. Kt.
    Language: German
    Note: Förderkennzeichen BMBF 03G0209B. - Kartenanh. u.d.T.: Bathymetric chart of the South East Pacific , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden. - Auch als elektronische Ressource vorh
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    GEOMAR CATALOGUE
    Link to Library Catalog
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  • 3
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    Sound velocity at CTD station SO194_CTD-1 (2009)
    PANGAEA
    Details
    Publication Date: 2024-06-25
    Keywords: BIO-LUMINESZENZ; CTD; CTD/Rosette; CTD-RO; DEPTH, water; SO194_CTD-1; SO194/1; Sonne; Sound velocity in water; South Pacific Ocean
    Type: Dataset
    Format: text/tab-separated-values, 198 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Ocean hydrophone sgy-files of seismic refraction and wide angle data from the marine fore-arc off Nicaragua from profiles NIC20 and NIC50 of R/V Maurice Ewing cruise EW0005 (2021)
    PANGAEA
    Details
    Publication Date: 2024-06-12
    Description: We provide seismic refraction and wide-angle data from two profile shot across the marine fore-arc of Nicaragua, Central Maerica. Profiles NIC20 and NIC50 were obtained aboard the US R/V Maurice Ewing cruise EW00–05 in 2000. All profile run across the condinantal margin and provide in total 26 digital record sections.
    Keywords: 1992 Nicaragua tsunami earthquake; Binary Object; Binary Object (File Size); Event label; EW0005; EW0005_NIC20; EW0005_NIC50; EW0005_OBH01; EW0005_OBH02; EW0005_OBH03; EW0005_OBH04; EW0005_OBH05; EW0005_OBH06; EW0005_OBH07; EW0005_OBH08; EW0005_OBH09; EW0005_OBH10; EW0005_OBH11; EW0005_OBH12; EW0005_OBH13; EW0005_OBH15; EW0005_OBH16; EW0005_OBH17; EW0005_OBH19; EW0005_OBH20; EW0005_OBH21; EW0005_OBH22; EW0005_OBH23; EW0005_OBH24; EW0005_OBH25; EW0005_OBH26; EW0005_OBH27; EW0005_OBH28; File content; Latitude of event; Longitude of event; Marine Fore-arc; Maurice Ewing; North Pacific Ocean; OBH; Ocean bottom hydrophone; SEIS; Seismic; seismic refraction; Seismic structure; Seismic tomography
    Type: Dataset
    Format: text/tab-separated-values, 30 data points
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    DATA PANGAEA
  • 5
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    Multibeam bathymetry raw data (Atlas Hydrosweep DS echo sounder entire dataset) of RV SONNE during cruise SO96/1 (2023)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: Multibeam bathymetry raw data was recorded in the North Pacific during cruise SO96/1 that took place between 1994-06-09 and 1994-06-27. The data was collected using the ship's own Atlas Hydrosweep DS echo sounder.
    Keywords: Binary Object; Binary Object (File Size); Binary Object (Media Type); Comment; DAM_Underway; DAM Underway Research Data; Data file recording distance; Data file recording duration; DATE/TIME; ELEVATION; Event label; File content; KODIAKSEIS; LATITUDE; LONGITUDE; Number of pings; Ship speed; SO96/1; SO96/1_0_Underway-1; Sonne; Start of data file, depth; Start of data file, heading; Start of data file recording, date/time; Start of data file recording, latitude; Start of data file recording, longitude; Stop of data file, depth; Stop of data file, heading; Stop of data file recording, date/time; Stop of data file recording, latitude; Stop of data file recording, longitude
    Type: Dataset
    Format: text/tab-separated-values, 493 data points
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    DATA PANGAEA
  • 6
    Electronic Resource
    Electronic Resource
    An automated ray method for diffraction modelling in complex media (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 116 (1994), S. 0 
    Details
    ISSN: 1365-246X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: We present the computational concept and first results of an automated 2-D ray-tracing algorithm which combines the standard ray method with the method of edge waves and paraxial ray tracing. Reliable ray synthetic seismograms are obtained for subsurface structures of high complexity. Both diffracted and multiple diffracted arrivals are automatically computed, complementing all types of primary arrivals (reflected, multiple reflected, converted waves, etc.) where geometric shadow zones are caused by edges (inhomogeneities) in the subsurface model. The method of computation can be summarized as follows: (1) during standard ray tracing, properties of central and paraxial rays are computed for a set of neighbouring rays. (2) Diffraction points (edges) are identified by comparing the amplitude and traveltime differences of neighbouring rays with the corresponding values of their paraxial approximation. (3) Detected edges are used as source points for diffracted rays. (4) Repetition of (1)-(3) for diffracted rays allows computation of multiple diffractions (‘diffracted diffractions’). (5) The amplitude decay of diffracted arrivals is computed according to the theory of edge waves. Its critical variables are expressed in terms of second-order paraxial traveltimes. The method is demonstrated for a simple and complex synthetic model and a real data complex model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-246X.1994.tb02124.x
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    Paper (German National Licenses)
    Fulltext
  • 7
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    FS Sonne Fahrtbericht/Cruise Report SO 190 (2010)
    IFM-Geomar, Kiel
    Details
    Publication Date: 2021-03-29
    Description: report
    Keywords: 551.4 ; 551.22 ; 550
    Language: English
    Type: article , publishedVersion
    Format: 193 S.
    Format: application/pdf
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    CITATION GEO-LEO
  • 8
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    FS Sonne Fahrtbericht/Cruise Report SO 186 Leg 3 (2010)
    IFM-Geomar, Kiel
    Details
    Publication Date: 2021-03-29
    Description: report
    Keywords: 551.4 ; 551.22 ; 550 ; UKD 100 ; TSZ 200 ; TSJ 200 ; TOH 300 ; TOH 100 ; TOH 200 ; TQC 600 ; Expeditionsberichte {Regionale Ozeanologie, Indischer Ozean} ; Indischer Ozean {Geophysik} ; Südostasien {Geophysik} ; Seismische Wellen {Geophysik} ; Seismometrie {Geophysik} ; Seismische Vorhersagen {Geophysik} ; Tiefseeseismik {Geophysik}
    Language: English
    Type: article , publishedVersion
    Format: 212 S.
    Format: application/pdf
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    CITATION GEO-LEO
  • 9
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    Crustal structure of the Chugach Mountains, southern Alaska: A study of peg-leg multiples from a low-velocity zone (1989)
    AGU (American Geophysical Union)
    In:  Journal of Geophysical Research: Solid Earth, 94 (B11). pp. 16023-16035.
    Details
    Publication Date: 2018-03-06
    Description: A seismic refraction profile recorded along the geologic strike of the Chugach Mountains in southern Alaska shows three upper crustal high-velocity layers (6.9, 7.2, and 7.6 km/s) and a unique pattern of strongly focussed echelon arrivals to a distance of 225 km. The group velocity of the ensemble of echelon arrivals is 6.4 km/s. Modeling of this profile with the reflectivity method reveals that the echelon pattern is due to peg-leg multiples generated from with a low-velocity zone between the second and third upper crustal high-velocity layers. The third high-velocity layer (7.6 km/s) is underlain at 18 km depth by a pronounced low-velocity zone that produces a seismic shadow wherein zone peg-leg multiples are seen as echelon arrivals. The interpretation of these echelon arrivals as multiples supersedes an earlier interpretation which attributed them to successive primary reflections arising from alternating high- and low-velocity layers. Synthetic seismogram modeling indicates that a low-velocity zone with transitional upper and lower boundaries generates peg-leg multiples as effectively as one with sharp boundaries. No PmP or Pn arrivals from the subducting oceanic Moho at 30 km depth beneath the western part of the line are observed on the long-offset (90-225 km) data. This may be due to a lower crustal waveguide whose top is the high-velocity (7.6 km/s) layer and whose base is the Moho. A deep (~54 km) reflector is not affected by the waveguide and has been identified in the data. Although peg-leg multiples have been interpreted on some long-range refraction profiles that sound to upper mantle depths, the Chugach Mountains profile is one of the few crustal refraction profiles where peg-leg multiples are clearly observed. This study indicates that multiple and converted phases may be more important in seismic refraction/wide-angle reflection profiles than previously recognized.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1029/JB094iB11p16023
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 10
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    Crustal structure of the central Sunda margin at the onset of oblique subduction (2001)
    Wiley
    In:  Geophysical Journal International, 147 (2). pp. 449-474.
    Details
    Publication Date: 2018-07-16
    Description: The convergent margin of the central Sunda Arc in Indonesia was the target of a reflection and refraction seismic survey conducted in 1998 and 1999. Along two seismic lines across the subduction complex off southern Sumatra and off Sunda Strait, coincident multichannel and wide-angle data were collected, complemented by two refraction strike-lines in the forearc basin off Sumatra. The combined analysis of the acquired data allows us to present a detailed model of the subduction zone where initiation of strain partitioning occurs due to the onset of oblique subduction. The dip of the subducted plate is well defined along both dip-lines and a lateral increase from 5° to 7° from beneath the outer high off Sumatra to Sunda Strait is supported by complementary gravity modelling. The downgoing slab is traced to a depth of more than 30km. On both reflection dip-lines, a clearly developed backstop structure underlying a trench slope break defines the landward termination of the active accretionary prism and separates it from the outer high. Active subduction accretion is supported by laterally increasing velocities between the deformation front and the active backstop structure. Seismic velocities of the outer high are moderate along both lines (〈5.8kms−1 at 20km depth), suggesting a sedimentary composition. Reduced reflectivity beneath a rugged top basement traced along the outer high of both dip-lines supports a high degree of deformation and material compaction. Several kilometres of sediment has accumulated in the forearc domain, although a distinct morphological basin is only recognized off southern Sumatra and is not developed off Sunda Strait. The bathymetric elevation of the Java shelf that is encountered in the southern Sunda Strait corresponds to increased velocities of a basement high there and is connected to extensional structures of the Sunda Strait transtensional basin. Differences observed in the morphology of the forearc domain are also reflected in the lower crustal structure. Off southern Sumatra, the velocity–depth model clearly indicates a continental-type crust underlying the forearc basin, whereas lower velocities are found beneath the Sunda Strait forearc domain. Off Sumatra, some 3-D constraint on the upper plate structure is gained from the refraction strike-lines, which in addition is supported by synthetic data modelling.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1046/j.0956-540x.2001.01547.x
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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