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84,530 research outcomes, page 1 of 8,453
  • publication . Article . 2021
    Closed Access
    Authors:
    Enzo Cataldo; Lionel Wilson; Steve Lane; Jennie Gilbert;
    Persistent Identifiers
    Publisher: American Geophysical Union (AGU)
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  • publication . Other literature type . Article . 2021
    Open Access
    Authors:
    Yannik Behr; John Townend; Stephen Bannister; Martha K. Savage;
    Publisher: Victoria University of Wellington Library

    Ambient noise correlation has been successfully applied in several cases to regions with dense seismic networks whose geometries are well suited to tomographic imaging. The utility of ambient noise correlation-based methods of seismic imaging where either network or noi...

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  • publication . Other literature type . Article . 2021
    Open Access
    Authors:
    Jessica H. Johnson; Stephanie G. Prejean; Martha K. Savage; John Townend;
    Publisher: American Geophysical Union (AGU)

    We use shear wave splitting (SWS) analysis and double-difference relocation to examine temporal variations in seismic properties prior to and accompanying magmatic activity associated with the 2008 eruption of Okmok volcano, Alaska. Using bispectrum cross-correlation, a...

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  • publication . Other literature type . Article . Preprint . 2021
    Open Access
    Authors:
    Olaf Scholten; Brian Hare; Joseph R. Dwyer; C. Sterpka; Ivana Kolmasova; Ondrej Santolik; Radek Lan; Luděk Uhlíř; Stijn Buitink; Arthur Corstanje; ...
    Countries: Germany, Czech Republic, Belgium, Netherlands
    Project: EC | LOFAR (640130), EC | LOFAR-AUGER (227610)

    With LOFAR we have been able to image the development of lightning flashes with meter-scale accuracy and unprecedented detail. We discuss the primary steps behind our most recent lightning mapping method. To demonstrate the capabilities of our technique we show and inte...

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  • publication . Article . 2019
    Open Access
    Authors:
    Craig G. Gelpi; Karen E. Norris;
    Persistent Identifiers
    Publisher: eScholarship, University of California
    Country: United States

    [1] Long-duration temperature measurements from a variety of sources, including island thermographs, CalCOFI cruise archives, NOAA buoys, and coastal piers are analyzed to determine the seasonal dynamics of the upper ocean (0–30 m) in the Southern California Bight. Dyna...

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  • publication . Article . Preprint . 2019
    Open Access
    Authors:
    Hiatt, Matthew; Sonke, Willem; Addink, Elisabeth A.; van Dijk, Wout M.; van Kreveld, Marc; Ophelders, Tim; Verbeek, Kevin; Vlaming, Joyce; Speckmann, Bettina; Kleinhans, Maarten G.; ...
    Publisher: California Digital Library (CDL)
    Country: Netherlands

    Automatic extraction of channel networks from topography in systems with multiple interconnected channels, like braided rivers and estuaries, remains a major challenge in hydrology and geomorphology. Representing channelized systems as networks provides a mathematical f...

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  • publication . Article . 2019
    Open Access
    Authors:
    Chen, Guixing; Iwai, Hironori; Ishii, Shoken; Saito, Kazuo; Seko, Hiromu; Sha, Weiming; Iwasaki, Toshiki;
    Persistent Identifiers
    Publisher: American Geophysical Union (AGU)
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  • publication . Article . Other literature type . 2018
    Closed Access
    Authors:
    David V. Fitterman; W. D. Stanley; R. J. Bisdorf;
    Publisher: American Geophysical Union (AGU)

    From the interpretation of magnetotelluric, transient electromagnetic, and Schlumberger resistivity soundings, the electrical structure of Newberry Volcano in central Oregon is found to consist of four units. From the surface downward, the geoelectrical units are (1) ve...

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  • publication . Article . Other literature type . 2018
    Open Access
    Authors:
    Mark E. Gettings; H.R. Blank; Walter D. Mooney; J.H. Healy;
    Publisher: American Geophysical Union (AGU)

    A self-consistent regional-scale model of the crust and upper mantle for the southern Arabian Shield and Red Sea paar has been constructed from an integrated interpretation of seismic deep refraction, regional gravity, aeromagnetic, heat flow, and surface geologic data....

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  • publication . Other literature type . Article . 2018
    Open Access
    Authors:
    Jeffrey J. Daniels; Gary R. Olhoeft; James H. Scott;
    Publisher: American Geophysical Union (AGU)

    Laboratory and well log physical property measurements show variations in the mineralogy with depth in UPH-3. Gamma ray values generally decrease with depth in the drill hole, corresponding to a decrease in the felsic mineral components of the granite. Correspondingly, ...

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84,530 research outcomes, page 1 of 8,453