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  • SPACE SCIENCES  (3)
  • Magnitude  (2)
  • Strong motions  (2)
  • Tectonics  (2)
  • 1
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    In:  Pageoph, Luxembourg, Conseil de l'Europe, vol. 115, no. 7055, pp. 441-458, pp. B05S07, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1977
    Keywords: Seismology ; Stress drop ; Tectonics ; Stress ; Plate tectonics
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  • 2
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    In:  J. Geophys. Res., Luxembourg, Conseil de l'Europe, vol. 84, no. 7055, pp. 2348-2350, pp. B05S07, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1979
    Keywords: Seismology ; Magnitude ; Source parameters ; seismic Moment ; Statistical investigations ; JGR
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  • 3
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    In:  J. Geophys. Res., Luxembourg, Conseil de l'Europe, vol. 84, no. 7055, pp. 2235-2242, pp. B05S07, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1979
    Keywords: Seismicity ; SModelling ; Tectonics ; Stress ; Strong motions ; Earthquake hazard ; JGR
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  • 4
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    In:  Bull. Seism. Soc. Am., Luxembourg, Conseil de l'Europe, vol. 71, no. 7055, pp. 2071-2095, pp. B05S07, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1981
    Keywords: Seismology ; Strong motions ; Spectrum ; BSSA
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  • 5
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    In:  Eos, Trans., Am. Geophys. Un., Luxembourg, Conseil de l'Europe, vol. 78, no. 35, pp. 369, 373, 377, pp. B05S07, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1997
    Keywords: Statistical investigations ; Earthquake hazard ; Magnitude ; Earthquake risk
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  • 6
    Publication Date: 2019-06-27
    Description: The relative absence of lunar volcanism in the last 3 b.y. and the Apollo 15 heat flow measurement suggest that present-day temperatures in the moon are approximately steady state to depths of 100 km. An exponential distribution of heat sources with depth is scaled by equating the surface heat flow to the integrated heat production of this exterior shell. Presumed present-day interior temperatures and the present-day surface heat flow of 30 ergs/cm2-sec are obtained. The estimated homogeneous concentrations of U, the chemistry of the lunar surface material and inferences to modest depth, and the short accretion time of the moon necessary to provide large-scale differentiation at 4.6 AE suggest that the moon had its origin in the rapid accretion of compounds first condensing from the protoplanetary nebula. The present thermal state of the moon may involve at least some partial melting through all the lunar interior deeper than 200 km. Such a thermal configuration is inconsistent neither with temperatures inferred from electrical conductivity studies nor with the nonhydrostatic shape of the moon.
    Keywords: SPACE SCIENCES
    Type: NASA-CR-126558 , CONTRIB-2145
    Format: application/pdf
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  • 7
    Publication Date: 2019-06-27
    Description: The relative absence of lunar volcanism in the last 3,000,000,000 years and the Apollo 15 heat flow measurement suggest that present-day temperatures in the moon are approximately steady-state to depths of about 100 km. An exponential distribution of heat sources with depth may then be scaled by equating the surface heat flow to the integrated heat production of this exterior shell. Presumed present-day interior temperatures, as well as the present-day surface heat flow of about 30 erg/sq cm-sec, may be obtained with an initial temperature roughly corresponding to the Apollo 11 basalt solidus and exponential scaling of heat sources. The concentrations of U for an originally homogeneous moon are estimated to be about 0.009 micrograms per gram, close to that measured for eucrites and inferred for primitive inclusions of the Allende meteorite. The estimated homogeneous concentrations of U, the chemistry of the lunar surface material and inferences to modest depth, and the short accretion time of the moon necessary to provide large-scale differentiation at 4.6 AE suggest that the moon had its origin in the rapid accretion of compounds first condensing from the protoplanetary nebula.
    Keywords: SPACE SCIENCES
    Type: Physics of the Earth and Planetary Interiors; 5; Oct. 197
    Format: text
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  • 8
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    In:  Other Sources
    Publication Date: 2019-06-27
    Description: Basic observations are discussed which do not demand a presently cold moon and are consistent with a hot moon. It is suggested that an iron-deficient, highly resistive, hot lunar interior, capped by a cool, rigid lunar lithosphere with a thickness of several hundred kilometers, can explain the relevant observations and is a reasonable model of the moon today. The strength of the moon, lunar electrical conductivity profiles, the relative absence of present-day volcanic activity, and thermal history considerations are examined. Whether the deep interior of the moon is hot or cold has an important bearing on the overall composition of the moon and its origin.
    Keywords: SPACE SCIENCES
    Type: Science; 178; Dec. 22
    Format: text
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