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  • 1
    Monograph available for loan
    Monograph available for loan
    De Bilt : K.N.M.I.
    Call number: 13752
    Type of Medium: Monograph available for loan
    Pages: 90 S. : Ill., graph. Darst.
    Series Statement: K.N.M.I. 160
    Location: Upper compact magazine
    Branch Library: GFZ Library
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  • 2
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    In:  Pageoph, Luxembourg, Lawrence Livermore National Laboratory, vol. 59, no. 5, pp. 58-74, pp. L18610, (ISSN: 1340-4202)
    Publication Date: 1964
    Keywords: Source ; Seismology ; Fault plane solution, focal mechanism
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  • 3
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    In:  Tectonophys., Tokyo, Lawrence Livermore National Laboratory, vol. 3, no. 5, pp. 147-163, pp. L18610, (ISSN: 1340-4202)
    Publication Date: 1966
    Keywords: Source ; Seismology ; Fault plane solution, focal mechanism
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  • 4
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    In:  Tectonophys., Tokyo, Lawrence Livermore National Laboratory, vol. 53, no. 5, pp. 155-158, pp. L18610, (ISSN: 1340-4202)
    Publication Date: 1979
    Keywords: Seismicity ; Earthquake catalog ; Earthquake hazard
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  • 5
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    Royal Netherlands Meteorological Institute
    In:  Proceedings of the E.S.C. symposium in Luxembourg on 20-22 October 1975, De Bilt, Royal Netherlands Meteorological Institute, vol. 1034, no. 45, pp. 440-453, (ISBN 3-933346-037)
    Publication Date: 1976
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  • 6
    facet.materialart.
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    In:  Bull. Earthq. Res. Inst., Tokyo, Lawrence Livermore National Laboratory, vol. 43, no. 5, pp. 39-52, pp. L18610, (ISSN: 1340-4202)
    Publication Date: 1965
    Keywords: Source mechanics ; Source
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 205 (1965), S. 688-689 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The preliminary results are listed in Table 1. Table 1 Velocity Thickness Depth 1,500 m/sec 40m 40m 1-85 km/sec 2-2 km 2-2km 3-0 km/sec 1-0 km 3-2 km 6-15 km/sec 26-5 km 30km 8-3 km/sec Velocity-depth profile at 54 40' N, 3 20' E. The ...
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 43 (1959), S. 159-166 
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Differences between epicenter azimuths and the direction of arrival of firstP-waves are determined from the horizontal seismograms of Djakarta station. Systematic azimuth deviations of more than 15° are encountered in the NW through N to SE azimuths. Azimuth deviations caused by a discontinuity dipping 5, 10 and 15° and with a ratio of velocity of longitudinal waves at either side of the discontinuity of 1.23, 1.38 and 1.52 are calculated. The most simple model suitable to the observed data is that of a discontinuity with a velocity ratio of about 1.5, dipping 8–10° in a N 10° E direction. In the S and W directions of Djakarta no dipping discontinuity is needed to account for the few observed data in these quadrants.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    International journal of earth sciences 59 (1969), S. 36-56 
    ISSN: 1437-3262
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Abstract The seismicity of Europe and the methods used to determine the mechanism in the focus of earthquakes are briefly summarized. In general, the fault plane solutions of European earthquakes are in agreement with an about W-E to WNW-ESE directed stress in the underground. The upper mantle earthquakes on the margin of the Tyrrhenian Sea and the Calabrian arc form an indication for the generation of new ocean floor in the SE corner of the Tyrrhenian Sea in the wake of the ESE drifting Calabrian arc. The Aegean Sea sector resembles a “Verschluckungszone” for material drifting in from both NW and ENE. The about W-E directed stress field is probably coupled with that of the mid-ocean ridge system of the North Atlantic. Several data indicate that also during the Alpine orogenesis and even earlier the main stresses were directed W-E and not N-S as hitherto normally assumed.
    Abstract: Résumé La séismicité de l'Europe et les méthodes pour la détermination du mécanisme au foyer des tremblements de terre sont résumées brièvement. En général, les solutions de plans de faille des tremblements de terre Européens sont en accord avec une contrainte dans le sous-sol orientée à peu près W-E ou WNW-ESE. Les tremblements de terre au manteau supérieur de l'arc Calabrien suggèrent la formation d'un nouveau fond océanique dans la coin SE de la mer Tyrrhénienne dans le sillage de l'arc Calabrien dérivant vers le ESE. Le secteur de la mer Egéenne semble être une «Verschluckungszone» pour des matériaux dérivant vers le centre à partir du NW et ENE. Le champ de contrainte dans la région est probablement lié à celui du système dorsal de l'océan Atlantique Nord. Plusieurs données indiquent que pendant l'orogenèse alpine et même plus tôt les contraintes principales étaient orientées à peu près W-E et non pas dans la direction N-S comme ordinairement supposé jusqu'à maintenant.
    Notes: Zusammenfassung Die Seismizität Europas und die Methoden für die Bestimmung des Mechanismus in Erdbebenherden werden kurz zusammengefaßt. Im allgemeinen stimmen die Lösungen der Bruchfläche europäischer Erdbeben überein mit einer Hauptspannung in W-E-bis WNW-ESE-Richtung. Die Erdbeben des oberen Mantels vom Übergangsgebiet Tyrrhenisches Meer-Kalabrischer Bogen weisen auf eine Bildung von neuer Ozeankruste in der SE-Ecke des Tyrrhenischen Meeres im Sog des sich ESE verschiebenden Kalabrischen Bogens hin. Der Abschnitt des Ägäischen Meeres hat den Anschein einer Verschluckungszone für Krustenmaterial, das von NW und von ENE hereinschwimmt. Die ungefähr W-E gerichtete Hauptspannung im Gebiet ist aller Wahrscheinlichkeit nach gekoppelt mit derjenigen des mittozeanischen Grabensystems des Nordatlantischen Ozeans. Verschiedene Daten geben an, daß auch während der alpinen Orogenese und sogar noch früher die Hauptspannungen ungefähr W-E gerichtet waren und nicht in N-S-Richtung, wie normalerweise bis jetzt angenommen wurde.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 124 (1986), S. 825-840 
    ISSN: 1420-9136
    Keywords: Physical modelling ; tensile fracturing ; shallow earthquakes ; tensile source component
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The laboratory tests carried out in studying shear and tensile seismogenic displacements occurring in compressed samples, led us to search for earthquakes with a tensile source component. To determine this component in the seismic focus, a special procedure based on the construction of radiation patterns of the combined shear-tensile type is introduced. The criteria for selecting the events produced by the combined source mechanism are listed, and their limitations are mentioned. From the seismic zones with good azimuthal distribution of stations in the world seismic network nine earthquakes which occurred in the 6-year period 1976–1981 were analyzed; for these events better agreement of the observed and theoretical patterns was found for the combined shear-tensile source mechanism than for the pure double-couple mechanism. However, the share of the tensile component was always, found to be relatively small, ranging from 1 to 13 percent of the shear component. The comparison of the two solutions (double-couple vs. combined shear/tensile) is based on the first onset signs statistics. The results obtained indicate that tensile fracturing does not play a substantial role in the total amount of released seismic energy; on the orther hand, it is expected to be more important in the creation and development of focal zone morphology from both the instantaneous and long-term point of view.
    Type of Medium: Electronic Resource
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