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Computer Analysis of Seismic Refraction Data.

Authors
Scott-JH; Burdick-RD; Tibbetts-BL
Source
NTIS: PB 208 770 :95 pages
Link
NIOSHTIC No.
10000828
Abstract
A technique of seismic refraction data analysis has been developed in which a digital computer is used to generate a two-dimensional model representing a layered-earth depth interpretation. Travel times are picked on seismic records by the human interpreter. These times, together with shot point and geophone locations and refraction-layer control information, are submitted to the computer on punched cards. A first approximation delineation of each refraction horizon is obtained by a computer adaptation of the delay- time method. The approximation is then tested and improved by the computer through the use of a ray-tracing procedure in which ray travel times computed for the model are compared against field- measured travel times. The model is subsequently adjusted in an iterative manner so as to minimize the discrepancy between computed and measured travel times. The Fortran program is listed in the appendix of the report together with instructions for preparing data cards and examples of results.
Publication Date
19720101
Document Type
IH; Report of Investigations
Fiscal Year
1972
NTIS Accession No.
PB-208770
NTIS Price
A06
Identifying No.
RI 7595
NIOSH Division
DRC;
Source Name
NTIS: PB 208 770
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