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Analysis of upper mantle structure using wave field continuation of P waves

Walck, Marianne C. and Clayton, Robert W. (1984) Analysis of upper mantle structure using wave field continuation of P waves. Bulletin of the Seismological Society of America, 74 (5). pp. 1703-1719. ISSN 0037-1106.

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Wave field continuation transforms seismic record section data directly into velocity-depth space, simultaneously providing an estimate of model nonuniqueness. This inversion, previously used for reflection and refraction data, converts readily to spherical earth problems through simple adjustments in each of the two linear transformations: the slant stack and downward continuation. Because the time resolution inherent in the data transforms to depth resolution in the model space, this method is extremely useful for analysis of data compatibility with preexisting models and direct comparison between data sets, as well as the complete inversion of raw data for structure. Wave field inversion demands densely sampled, digital data, and assumes source coherency and lateral homogeneity along the profile. We test this technique for upper mantle analysis using a previously studied, large, array-recorded data set representative of structure beneath the Gulf of California. We compare slant stacks and downward continuations of both synthetic and data record sections to illustrate the method's resolution capability. Wave field continuation proves particularly useful in comparing entire data sets to various models; even subtle structural differences are resolvable given good data quality.

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Clayton, Robert W.0000-0003-3323-3508
Additional Information:© 1984 Seismological Society of America. Manuscript received 15 March 1984. The authors thank Don Anderson, Hiroo Kanamori, and Steve Grand for reviewing the manuscript. This work was supported by Sun Oil Co., National Science Foundation Grant EAR811-5236, and NASA Contract NSG-7610.
Group:Seismological Laboratory, Division of Geological and Planetary Sciences
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Issue or Number:5
Record Number:CaltechAUTHORS:20121010-143010960
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Official Citation:Marianne C. Walck and Robert W. Clayton Analysis of upper mantle structure using wave field continuation of P waves Bulletin of the Seismological Society of America October 1984 74:1703-1719
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:34830
Deposited By: Ruth Sustaita
Deposited On:10 Oct 2012 22:06
Last Modified:03 Oct 2019 04:22

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