caa a22 4500 477047645 CHVBK 20180405111334.0 cr unu---uuuuu 170330e19960601xx s 000 0 eng 10.1007/BF00876443 doi (NATIONALLICENCE)springer-10.1007/BF00876443 Interpretation of first arrival travel times in seismic refraction work [Elektronische Daten] [Kalachand Sain, K. Kaila] The necessary condition for the seismic refraction method to succeed is that the refracted first arrivals from each layer in a multilayered earth system should be detected on a seismogram as first arrivals, and this is possible only when velocities of all underlying layers are successively greater. The usual procedure to interpret the refraction travel times is to fit such a data set with several intersecting straight lines by employing a visual technique which may lead to errors of subjective judgment, as the velocity model depends on the selection of various line segments through the data. To remove the visual fit we propose here a layer stripping method based on minimum intercept time, apparent velocity, rms residual, and maximum data points by least-squares fitting to yield several intersecting straight lines. Once data are segmented out, the conventional equations can be used to determine the velocity structure. Birkhäuser Verlag, 1996 First arrival travel times nationallicence stripping method nationallicence velocity structure nationallicence Sain Kalachand National Geophysical Research Institute, 500 007, Hyderabad, India aut Kaila K. 2-16-106 Prashantinagar, Uppal Road, 500 039, Hyderabad, India aut pure and applied geophysics Birkhäuser-Verlag 147/1(1996-06-01), 181-194 0033-4553 147:1<181 1996 147 24 https://doi.org/10.1007/BF00876443 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00876443 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sain Kalachand National Geophysical Research Institute, 500 007, Hyderabad, India aut NATIONALLICENCE 700 1- Kaila K. 2-16-106 Prashantinagar, Uppal Road, 500 039, Hyderabad, India aut NATIONALLICENCE 773 0- pure and applied geophysics Birkhäuser-Verlag 147/1(1996-06-01), 181-194 0033-4553 147:1<181 1996 147 24 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer