8 



10 



NalTeco^ded TRAVEL-TIME CURVES 



on channel Nol 

 Mpj ___* — seismometers 



*ftM= 



: \ ^--y^shotpoint 



^ / ~~~~*-.^ .-reflected ray 



t \lnu/pr v/plnritv Invpr^-^ 



■£ 



lower velocity layer 



direct ray 



2~ 



^ 



ref roc le d _ray _ 



coincident point 



higher velocity layer 



RAY- PATH DIAGRAM 



-sJV 



-t/v— 



~^ 



^ 



-^ 



I _ui^f 



2° — a- 



"3 F+" 



5 ?> s ' t-^h 



6 c 1 AHAr- 



-%, 



/— *~~Mt~- j 



■Idealized - 

 "reflection" 



— if — from deeper 

 -V — horizontal - 

 -^—horizon 



^_ 



-«A- 



ASSOCIATED IDEALIZED SEISMOGRAM 



566 



Figure 26-5 



