Velocity of seismic waves in the Earth's mantle
- Creators
- Gutenberg, B.
Abstract
On the basis of our present knowledge the Earth's mantle may be divided into four sections: (a) from the Mohorovicic discontinuity to a depth of about 200 km, with small changes in the wave velocities which have minima in this section; (b) from 200 to 950± km with relatively rapid, fairly regular increase in velocity; (c) from 950 to 2700± km with smaller and less regular increase in velocity; almost straight line portions of the travel-time curves and relatively small wave amplitudes at certain ranges of distance indicate at least two portions of (c) where the wave velocity increases relatively little with depth; (d) from 2700 km depth to the core boundary with little change in velocity and probably maxima roughly 100 km above the core boundary.
Copyright and License
©1958. American Geophysical Union.
Additional Information
Communicated manuscript received December 16, 1957, and, as revised, March 3, 1958; open for formal
discussion until November 1, 1958.
Contribution No. 853, Division of the Geological Sciences, California Institute of Technology, Pasadena,
California.
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Additional details
- Other Numbering System Name
- Caltech Division of Geological Sciences
- Other Numbering System Identifier
- 853
- Publication Status
- Published