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P-wave velocity anomalies in the earth's mantle from the Uppsala array observations (1974)

Kulhánek, Ota ; Brown, R. James

Springer

Pure and applied geophysics 112 (1974), S. 597-617

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ISSN: 1420-9136

Source: Springer Online Journal Archives 1860-2000

Topics: Geosciences , Physics

Notes: Summary Distribution of compressional-wave velocities in the mantle is determined fromdT/dΔ measurements using the Uppsala seismograph array station (UPSAS). Short-period vertical-component seismograms from 181 events in the epicentral distance range 16°–100° have been used. The velocity distribution shows anomalous variations at depths of 750, 1500, 1800, 2300 and 2550 km. Evidence of lateral heterogeneity beneath the northern part of the Asian continent, in the depth range 1700–2300 km, is discussed. Computed travel times, based on this velocity-depth relation, are tested by an examination of travel-time residuals from the Long Shot and Milrow explosions on Amchitka, Aleutian Islands.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00877296

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