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  • 1
    Electronic Resource
    Electronic Resource
    Apparent stress and stress drop for intraplate earthquakes and tectonic stress in the plates (1977)
    Springer
    Pure and applied geophysics 115 (1977), S. 317-331 
    Details
    ISSN: 1420-9136
    Keywords: Stress drop ; Intraplate stress ; Apparent stress
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The magnitude of shear stress in the lithosphere is bounded from below by the apparent stress and stress drop during intraplate earthquakes. Apparent stresses and stress drops for a number of mid-plate earthquakes are calculated from the earthquake magnitude, SH wave amplitude spectra, and estimates of the length of the fault zone. Apparent stresses vary between 0.1 and 2 bars, ifm b is used as a measure of seismic energy, and stress drops lie between 2 and 70 bars. There is no systematic difference in either apparent stress or stress drop between these intraplate events and typical plate boundary earthquakes. These bounds on intraplate shear stresses are consistent with the inference from current models of plate tectonic driving forces that regional stress differences in the plates are typically on the order of 100 bars. The highest stress drops measured for midplate earthquakes under this model represent nearly total release of local tectonic stress.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01637112
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  • 2
    Electronic Resource
    Electronic Resource
    Planetary science An older face for Mars (2002)
    [s.l.] : Nature Publishing Group
    Nature 418 (2002), S. 27-28 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A surprising finding from the exploration of Mars by orbiting spacecraft in the 1970s was that the southern and northern hemispheres have very different surfaces. The density of impact craters seen in images taken by Mariner 9 and Viking Orbiter indicated that the surface of the topographically ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/418027a
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  • 3
    Electronic Resource
    Electronic Resource
    Seismic structure of the Iceland mantle plume (1997)
    [s.l.] : Nature Publishing Group
    Nature 385 (1997), S. 245-247 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Although the interaction between the Iceland plume and the Mid-Allan tic Ridge (MAR) has several evident manifestations, a detailed understanding of that interaction has been elusive. The Iceland hotspot generates a broad topographic high6, thicker than normal crust13, and a pronounced geochemical7 ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/385245a0
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  • 4
    Electronic Resource
    Electronic Resource
    Seismic evidence for a lower-mantle origin of the Iceland plume (1998)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 395 (1998), S. 62-65 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Iceland, one of the most thoroughly investigated hotspots, is generally accepted to be the manifestation of an upwelling mantle plume. Yet whether the plume originates from the lower mantle or from a convective instability at a thermal boundary layer between the upper and lower mantle near ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/25714
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  • 5
    Electronic Resource
    Electronic Resource
    An inside view (1985)
    [s.l.] : Nature Publishing Group
    Nature 314 (1985), S. 203-203 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE United States planetary programme is midway through a five-year hiatus in major new observations from spacecraft missions, and an increasing number of American scientists are filling the gap by writing textbooks and monographs on various aspects of planetary science. Hubbard's offering treats ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/314203a0
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  • 6
    Electronic Resource
    Electronic Resource
    The seismic moment budget of slowly spreading ridges (1988)
    [s.l.] : Nature Publishing Group
    Nature 334 (1988), S. 58-60 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] From a formal inversion of long-period teleseismic P and SH waveforms10, we have determined3-6 the source parameters of 50 earthquakes during the period 1962-83 along ridges spreading at half rates of 1 to 22 mm per yr11. In addition to centroid depth and source mechanism (double couple ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/334058a0
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  • 7
    Electronic Resource
    Electronic Resource
    New images for old faults (1990)
    [s.l.] : Nature Publishing Group
    Nature 344 (1990), S. 816-817 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/344816a0
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  • 8
    Electronic Resource
    Electronic Resource
    Tectonic activity on Venus (1988)
    [s.l.] : Nature Publishing Group
    Nature 331 (1988), S. 305-306 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] AMONG the terrestrial planets, Venus is the most similar to Earth in terms of distance from the Sun, mass and bulk density. An understanding of the global tectonics of Venus could, therefore, lead to a deeper insight into the form of mantle convection and the nature of lithospheric evolution on ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/331305a0
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  • 9
    Electronic Resource
    Electronic Resource
    Stirring times for Mars (1994)
    [s.l.] : Nature Publishing Group
    Nature 369 (1994), S. 606-607 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE theory of plate tectonics accounts admirably for the current motions of the Earth's tectonic plates, which separate at mid-ocean ridges, converge at deep-sea trenches and active mountain belts, and slip horizontally past one another along great fault zones. But the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/369606a0
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  • 10
    Electronic Resource
    Electronic Resource
    Geodetic slip rate for the eastern California shear zone and the recurrence time of Mojave desert earthquakes (1994)
    [s.l.] : Nature Publishing Group
    Nature 367 (1994), S. 264-266 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Although most of the relative motion between the Pacific and North American tectonic plates in the southwestern United States occurs by slip on the San Andreas fault, there are numerous other faults that have slipped in the past million years1'2. Very-long-baseline-interferometry (VLBI) ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/367264a0
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