ODP logging contractor: LDEO-BRG
Well name:  504B
Leg: 111
Location:  Costa Rica Rift (tropical NE Pacific)
Latitude: 1° 13.611' N
Longitude: 83° 43.818' W
Logging date:  September, 1986
Bottom felt:  3474 mbrf (used for depth shift to sea floor)
Total penetration:  1562.3 mbsf
Total core recovered:  26.4 m (12.6 %)

VSP TOOL USED: WST (Well Seismic Tool)

Acquisition Transit Time: Time between shot firing (as recorded by blast phone) and first break. The shot is fired ~12 milliseconds after start of recording. 

VSP STACK SUMMARY LISTING (one-way transit times)

DEPTH	ACQUISITION_TRANSIT_TIME
(mbsf)	(ms)
1535	2706.01318
1519	2703.46924
1512	2703.93359
1506	2702.45557
1496	2699.83398
1486	2698.95752
1475	2696.19971
1466	2695.10986
1455	2693.06396
1446	2692.6001
1436	2689.96973
1426	2688.08398
1416	2687.52734
1406	2685.5
1396	2684.5
1386	2682.45117
1376	2681.56592
1366	2680.38037
1356	2679.61865
1346	2676.5
1336	2674.76318
1326	2673.97949
1316	2672.54688
1306	2670.84326
1296	2670.01953
1286	2668.24219
1276	2666.13672
1266	2665.20312
1256	2663.96582
1246	2661.37646
1236	2660.38867
1226	2658.86621
1216	2657.03369
1206	2655.52344
1196	2653.5625
1186	2652.78906
1176	2650.08691
1166	2649.29346
1156	2647.00244
1146	2646.04834
1136	2645.21484
1126	2643.31494
1116	2641.69238
1106	2639.52539
1096	2638.4248
1086	2636.41602
1076	2634.18018
1066	2632.62256
1056	2631.05811
1046	2629.58057
1036	2627.4707
1026	2625.51172
1016	2624.73584
1006	2622.25
996	2621.1875
986	2619.0835
976	2618.24121
966	2615.54102
956	2613.59521
946	2611.37744
936	2610.32373
936	2610.42529
926	2608.36328
916	2606.49268
906	2604.75879
896	2602.479
886	2600.74316
876	2597.99023
856	2594.91748
846.02	2593.6499
832	2590.43848
816.012	2587.96094
801	2584.95264
791	2583.32666
781	2581.25586
776	2579.87842
761	2576.66455
751	2575.62891
746	2574.89844
736	2572.64307
726	2570.57666
716	2566.11865
696	2564.67285
686	2562.77637
676	2560.94043
666	2558.80762
656	2556.7124
642.018	2554.02344
636.013	2553.59912
626.016	2552.13574
614	2549.97119
606	2548.86426
596	2546.94141
586	2545.08545
576	2542.40332
566	2541.35791
556	2539.96094
546	2537.05566
536	2535.4502
526	2533.56738
516	2531.8584
506	2530.68262
494	2528.62061
484	2525.729
476	2523.71582
466	2522.8374
456	2520.81836
446	2518.76514
436.018	2517.53809
426.021	2514.65186
416.023	2512.06006
406	2510.69922
396	2507.77539
386	2505.78223
376	2503.79834
364	2500.7793
356	2499.63379
346	2496.92236
336	2495.60889
326	2491.8623
316	2489.81055
306	2487.88672
296	2485.69238
286	2482.79639
246	2466
232	2456.8999
194	2434.7998
164	2416.8999