Global variation of body-wave attenuation in the upper mantle from teleseismic P wave and S wave spectra
نویسندگان
چکیده
منابع مشابه
Global variation of body‐wave attenuation in the upper mantle from teleseismic P wave and S wave spectra
[1] We constrain the spatial variation of P‐wave (tP*) and S‐wave (tS*) attenuation by inverting 190,000 teleseismic P‐ and S‐wave spectra up to 0.8 Hz. These spectra are derived from 250 deep earthquakes recorded at 880 broadband global and regional network stations. The variance and ratios of tP* and tS* values are consistent with PREM’s upper mantle velocity and Q structures and conventional...
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We present the results of an analysis of global lateral variations in anelasticity of the upper mantle, as measured from very long period Rayleigh waves observed on the GEOSCOPE network. Four consecutive wave trains are used on each record to eliminate uncertainty on the amplitude at the source and to take into account, in a linear manner, focussing effects due to lateral variations in elastic ...
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[1] Inversion of teleseismic P-time residuals along two linear seismic arrays provides well-resolved inverse images of the upper mantle. Low velocity bodies beneath the Yellowstone Hotspot Track and the Grand Mesa volcanic field in western Colorado are similar in shape and magnitude. In the two places where our transects cross the 1.78 Ga Archean-Proterozoic Cheyenne suture, high velocities are...
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Seismic-wave Attenuation and the state
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ژورنال
عنوان ژورنال: Geophysical Research Letters
سال: 2011
ISSN: 0094-8276
DOI: 10.1029/2011gl046812