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  • Bache Thomas C.; Marshall Peter D.; Bache Lolitia B. (1985-04-10)
    A model for the attenuation of high‐frequency (1–8 Hz) P waves is developed for paths from eastern Kazakhstan to arrays in Scotland (EKA), Canada (YKA), India (GBA), and Australia (WRA). The attenuation model includes ...
  • Brune James N. (1977-05)
    Q for S waves has been estimated by amplitude correlation of S and SS waves. The Q corresponding to the average Q−1 value is 131 ± 8. There is an indication that the Q values increase with distance, from about 100 at 30° ...
  • Anderson Don L.; Hart R. S. (1978-12-10)
    Regional body wave and surface wave studies indicate that there is a low‐Q upper mantle layer underlying a high‐Q lithosphere. Great circle surface wave attentuation is used to refine the Q structure of the upper mantle ...
  • Patton Howard J.; Taylor Steven R. (1984-08-10)
    Regionalized Rayleigh and Love wave attenuation coefficients have been measured across the Basin and Range province of western United States in the frequency range 0.02–0.2 Hz. The measurements were made by using the methods ...
  • Anonymous (1973-07)
    The first phase of a field experiment to control earthquakes has been successfully completed by scientists of the U.S. Geological Survey.The announcement of the breakthrough in earthquake research was made by USGS scientists ...
  • Anonymous (1995-08-08)
    Purdue University engineers are applying lessons learned from Japan's Kobe earthquake to their own research into the stability of bridges. Julio A. Ramirez, associate professor of structural engineering at Purdue, was one ...
  • Anonymous (1977-04)
    As part of an attempt to separate facts and fallacies about earthquake predictions, the U.S. Geological Survey, Department of the Interior, is keeping score on all earthquake predictions brought to its attention. The program ...
  • Kennett Brian (1988-11-15)
    New travel time tables to locate earthquakes are being developed under the Subcommission on Earthquake Algorithms of the International Association of Seismology and the Physics of the Earth's Interior (IASPEI).The standard ...
  • Katzoff Judith A. (1986-07-29)
    A series of four earthquakes shook an area centered 24 km north of Bishop, Calif., on July 20–21, 1986. The earthquake swarm prompted the director of the U.S. Geological Survey (USGS) to send a letter to the California ...
  • Stanbury A. C. (1962-01)
  • Burwell R. E.; Schuman G. E.; Piest R. F.; Spomer R. G.; McCalla T. M. (1974-04)
    The quality of water discharged from a 157.5‐ha diversified conservation‐farmed watershed in southwestern Iowa was within acceptable limits for potable water except for the levels of ammonia, inorganic phosphorus, and ...
  • Gregg Tracy K. P.; Fink Jonathan H. (1996-07-25)
    We have used carefully controlled laboratory simulations to develop a model which relates lava flow morphology to effusion rate and rheology. Through comparisons with measured and estimated eruption rates on Earth, this ...
  • Kochel R. Craig; Peake R. Thomas (1984-11-15)
    Extensive geomorphic mapping in the northern Martian fretted terrain of Deuteronilus and Protonilus Mensae shows details of the wastedominated landform association in this region. Wasting appears to have occurred along the ...
  • Middleton Elizabeth M. (1992-11-30)
    The fraction of photosynthetically active radiation (PAR) (λ = 0.4–0.7 μm) absorbed (FAPAR) is a critical parameter in canopy processes arid in land surface‐atmosphere interactions. FAPAR is typically inferred indirectly ...
  • Gum Russell L.; Roefs Theodore G.; Kimball Dan B. (1976-08)
    The basic structure of the Techcom planning methodology is reviewed. In the context of this system a weighting methodology is developed to measure preferences regarding the attainment of postulated societal goals. The ...
  • Webb Helen F.; Jordan Thomas H. (1993-10-22)
    The post‐depositional transport of pelagic sediments on rough seafloor is approximated as a nonlinear diffusive process. The topographic slope distribution of the sediment‐water interface depends primarily on the apparent ...
  • Czepiel P. M.; Mosher B.; Crill P. M.; Harriss R. C. (1996-07-20)
    Field, laboratory, and computer modeling methods were utilized to quantitatively assess the capability of aerobic microorganisms to oxidize landfill‐derived methane (CH4) in cover soils. The investigated municipal landfill, ...
  • Orville Richard E.; Helsdon John H.; Evans Walter H. (1974-09-20)
    Two hundred twenty‐four images of a lightning return stroke have been obtained with a high‐speed framing camera. The exposure time for each frame is 2 μs, and the time between frames is 77 μs. Channel diameters corrected ...
  • Goff John A. (1995-04-15)
    This paper seeks to develop a robust set of tools for estimating the stochastic properties of sea ice drafts. Five parameters are estimated, along with their formal uncertainties: mean draft, rms topographic variation, ...
  • Goff John A.; Stewart W. Kenneth; Singh Hanumant; Tang Xiaoou (1995-04-15)
    A recent upward looking sonar profile survey of a ∼10‐km by 10‐km area beneath the Arctic ice serves as a basis for an exploratory analysis of the quantitative characteristics of sea ice draft. In a companion paper (Goff, ...