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  • Articles  (89)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 12 (1948), S. 130-133 
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Zusammenfassung In Tabelle I geben die Verff. eine Liste der ihnen bekannten Tiefenbeben im östlichen Mittelmeer. Fig. 1 zeigt, dass deren IIerde im Allgemeinen in den Zonen der tätigen Vulkane liegen, ähnlich wie in der Umgebung des Pazifischen Ozeans. Dagegen ist deren Zusammenfallen mit positiven Schwereanomalien weniger doutlich.
    Abstract: Riassunto Gli AA. hanno raccolto nella Tab. 1 l'elenco dei terremoti profondi a loro noti del bacino mediterraneo orientale. La Fig. 1 mostra che in generale gli epicentri relativi sono distribuiti nelle zone dei vulcani attivi, analogamente a quanto accade ne'le regioni dell'Oceano Pacifico. Per contro, la connessione con le anomalie gravimetriche positive risulta meno evidente.
    Notes: Summary In Table I the authors give a list of known deep-focus earthquakes in the eastern Mediterranean. Fig. 1 shows that their epicenters generally lie in the zones of active volcanoes, as in the regions surrounding the Pacific Ocean; however, their coincidence with positive gravity anomalies is less evident.
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 29 (1954), S. 1-10 
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Effects of low-velocity channels in the atmosphere, the ocean and the solid earth are discussed. There are two major low-velocity channels in the atmosphere, one with its axis at the tropopause, and another at a height of about 80 km. They produce “zones of silence” and permit the transmissions of waves involving the whole atmosphere. Low-velocity layers in the ocean result from the combined effects of temperature, pressure and salinity. In the earth, the sudden decrease of velocity at the boundary of the core produces a low-velocity at the boundary of the core produces a low-velocity channel for elastic waves. In the earth's crust there are two major low velocity shannels, one below theMohorovičić discontinuity, the other at a depth of about 15 Km. Misinterpretation of their effects has caused incorrect conclusions concerning the structure of the outer portion of the earth's mantle.
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 177 (1956), S. 887-888 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] However, I doubt that the damping is as heavy as they suppose. Schweydar3 has shown that the form and amplitudes of the observed complicated motion of the poles can be explained with a good approximation as a beat phenomenon between the free Chandler period of the Earth of about fourteen months and ...
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 170 (1952), S. 289-289 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In 1914, in a different form, the following equation was developed by S. Mohorovicic1: V = V* r/R, where R is radius of the earth, F is velocity at the depth h = R? r of the focus, and F* is apparent velocity (dA/dtf) at the point of inflexion (distance A*) of the travel-time curve for longitudinal ...
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 176 (1955), S. 795-795 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Using new data, the following partly empirical equations have been set up: log.# = 9-4 + 2-14 ML - 0-054 ML* Ms - MB = A (Ms - B), where, originally1, A = 0-4, B = 7; further investigation suggests slight numerical revision. Data are scarcely sufficient to establish a relation between MS ...
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  • 6
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 144 (1939), S. 478-478 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Two electromagnetic microbarographs designed by H. Benioff to respond to pressure variations in the frequency range from five cycles per second to one cycle in thirty seconds approximately, and with sufficient sensitivity to record the natural unrest of the atmosphere, have been in operation at ...
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 141 (1938), S. 371-371 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE velocity of longitudinal waves in the earth increases with depth down to the core, at a depth of about 2,900 km., where there is a discontinuous drop from 13.7 km. to about 8 km. per sec. Within the core, the velocity has usually been calculated as increasing gradually to about 11.5 km. per ...
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  • 8
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 4 (1938), S. 0 
    ISSN: 1365-246X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    International journal of earth sciences 45 (1956), S. 342-353 
    ISSN: 1437-3262
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Zusammenfassung In den letzten Jahren haben sich viele unserer Anschauungen über den Aufbau der Erde erheblich geändert. Neue Ergebnisse, besonders durch Laboratoriumsexperimente und auf dem Gebiete der Erdbebenforschung, haben gezeigt, daß vielfach Folgerungen, die als gesicherte Ergebnisse betrachtet worden waren, auf zu einfache Annahmen aufgebaut waren. Im folgenden werden einige der neuen Beobachtungen und Ansichten besprochen.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    International journal of earth sciences 46 (1957), S. 30-38 
    ISSN: 1437-3262
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Roots of mountains are studied by use of gravimetric data, dispersion of surface waves, travel times of refracted and reflected body waves from earthquakes or artificial explosions. Under Southern and Central California, the thickness of the crust (depth of the Mohorovičić discontinuity) increases from about 20 km near the coast to 30–35 km under the lower valleys and to about 50 km under the Sierra Nevada. Near the Atlantic coast of the United States it increases from about 20 km under the shelf to about 30 km under the coast, 35 km under the Canadian Shield, and about 45 km under the southern Appalachians. In Western Europe it is about 25–30 km, seems to increase under the Central and Southern Alps to 45–50 km and possibly to 60 km under the Abruzzi. The thickness of the „granitic“ layer seems to be 25–30 km under Southern California and the Sierra Nevada, roughly 20 km under western Europe, but seems to increase to about 35 km under the Central and Southern Alps. Thus, the root under the Sierra Nevada is possibly mainly an effect of a thickening of the „basaltic“ layer, while under the Alps it results mainly from a thicker „granitic“ layer. This difference could result from different tectonic processes in the two regions during their late geological history. The local temperatures in the earth's crust can apparently greatly affect the depth at which phase changes occur and thus the thickness of the crust. Processes connected with reestablishment of isostatic equilibrium probably occur mainly below the crust.
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