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  • 1
    Non-book medium
    Non-book medium
    Seismic hazard and its quantification [Elektronische Ressource] (2004)
    Kanpur : National Information Center of Earthquake Engineering, Indian Institute of Technology
    Details Availability
    Call number: NBM 07.0098
    Type of Medium: Non-book medium
    Pages: 1 CD-ROM
    Classification:
    B..
    Location: Reading room
    Branch Library: GFZ Library
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  • 2
    Monograph available for loan
    Monograph available for loan
    Earthquakes : newly revised and expanded (1993)
    New York : Freeman and Company
    Details Availability
    Call number: M 93.1031
    Type of Medium: Monograph available for loan
    Pages: xvii, 331 S.
    ISBN: 0716722364
    Classification:
    Seismology
    Language: English
    Location: Upper compact magazine
    Branch Library: GFZ Library
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  • 3
    Monograph available for loan
    Monograph available for loan
    Earthquakes and geological discovery (1993)
    New York : Scientific American Library
    Details Availability
    Call number: M 94.0495
    Type of Medium: Monograph available for loan
    Pages: ix, 229 S.
    ISBN: 0716750406
    Classification:
    Seismology
    Language: English
    Location: Upper compact magazine
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  • 4
    Electronic Resource
    Electronic Resource
    Seismic Wave Slowness-Vector Estimation From Broad-Band Array Data (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 114 (1993), S. 0 
    Details
    ISSN: 1365-246X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: In this paper, a new procedure, called the coherent-signal-subspace method (CSS), for broad-band multiple-signal detection and slowness-vector estimation is discussed and applied to a surface seismographic array. the major improvements in estimation accuracy and resolution given by the CSS method, which was developed in the fields of radar and sonar, result from the use of extended-frequency components within the data bandwidth and a high-resolution algorithm. the former is made possible through a frequency focusing transformation that for each frequency component corrects for the phase-delay difference between that frequency and a reference frequency ωo. the result is the condensation of a broad frequency band into a narrow band at ωo. the high resolution algorithm used in the CSS method is the MUSIC (multiple signal characterization; Schmidt 1986) algorithm, which is based on the eigen property of the data cross-covariance matrix that the signal phase-delay vectors lie within the subspace spanned by the signal eigenvectors. the frequency transformation improves the singularity of the estimated cross-covariance matrix and the accuracy of the estimated signal eigenvectors at ωo, which are often serious problems in seismic array analysis. Combination of these two features in CSS ensures a superior array performance over the widely used beam steering and minimum-variance (Capon 1969) methods. Approximate methods to estimate the mean and variance of the estimated slowness vector are also presented in this paper. the estimation biases introduced by deterministic arrival-time deviations of array data from a plane wavefront are derived for the single signal case. It is shown that, in the case of a single signal, significant reduction in the estimation bias may be achieved if a large enough reference frequency is used in the CSS method. Finally, with observed and synthetic ground motions, tests are performed to illustrate the utility of CSS in resolving two closely separated signals. In both cases, CSS successfully resolved two separate peaks at almost the correct slowness vectors, while the conventional beam steering and minimum variance estimation methods either failed to resolve the two signals or gave an incorrect slowness estimate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-246X.1993.tb03913.x
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  • 5
    Electronic Resource
    Electronic Resource
    Personal reminiscences (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 118 (1994), S. 0 
    Details
    ISSN: 1365-246X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-246X.1994.tb03959.x
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  • 6
    Electronic Resource
    Electronic Resource
    Travel-time Tables for the Seismic Wave PKP (1965)
    [s.l.] : Nature Publishing Group
    Nature 207 (1965), S. 967-969 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Revised PKP travel-times are required for two main purposes: in order to derive the structural detail within the core, and in routine computer location of hypocentres of earthquakes. In the latter problem, because of the relatively small gradient of the travel-time curve, PKP observations provide a ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/207967a0
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  • 7
    Electronic Resource
    Electronic Resource
    Seismic Air Waves from the Great 1964 Alaskan Earthquake (1964)
    [s.l.] : Nature Publishing Group
    Nature 202 (1964), S. 1095-1096 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] EXCEPTIONAL atmospheric waves, resembling those ±_j from large nuclear explosions1-6, have been recorded at Berkeley after the Alaskan earthquake of March 28, 1964. This severe earthquake occurred 3,130 km away from Berkeley near the head of Prince William Sound. A preliminary determination ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2021095a0
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  • 8
    Electronic Resource
    Electronic Resource
    Gutenberg's Early Pkp observations (1962)
    [s.l.] : Nature Publishing Group
    Nature 196 (1962), S. 122-124 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN several important papers, Gutenberg13 has directed attention to seismic waves recorded as first arrivals at epicentral distances, D, between about 125 and 140 . At the shorter distances in this range the waves arrive between 15 and 20 sec earlier than the normal PKIKP waves. The early onsets ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/196122a0
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  • 9
    Electronic Resource
    Electronic Resource
    Spheroidal Oscillations of the Moon (1960)
    [s.l.] : Nature Publishing Group
    Nature 188 (1960), S. 1176-1177 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Three completely solid models of the Moon have been treated, each with radius, R 1,738 km., and mean density, =3-33 gm./c.c. Model I is a homogeneous sphere having throughout velocities for P and S waves of a = 8-2 km./sec., = 4-7 km./sec., respectively. Since only the differences between the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1881176a0
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  • 10
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    Inge Lehmann (1994)
    American Institute of Physics
    Details
    Publication Date: 1994-01-01
    Print ISSN: 0031-9228
    Electronic ISSN: 1945-0699
    Topics: Physics
    Published by American Institute of Physics
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