ODP logging contractor: LDEO-BRG
Well name:  504B
Leg: 148
Location: Costa Rica Rift (tropical NE Pacific Ocean)
Latitude: 1° 13.611' N
Longitude: 83° 43.818' E
Logging date: March, 1993
Bottom felt: 3474 mbrf (used for depth shift to sea floor)
Total penetration: 2111 mbsf
Total core recovered: 9.58 m (8.7 %), 2000-2111 mbsf interval.

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)
2073	2786.91504
2063	2785.47119
2053	2784.48291
2043	2782.28711
2033	2781.37939
2023	2779.33301
2013	2777.66846
2003	2776.68408
1993	2775.2666
1983	2773.94971
1973	2772.65625
1963	2770.90186
1953	2769.64258
1943	2767.05664
1933	2765.66064
1923	2763.84863
1913	2763.37891
1903	2761.23926
1893	2759.24609
1883	2758.5166
1873	2756.46631
1863	2754.95703
1853	2753.67188
1843	2751.94971
1833	2750.91553
1823	2748.56982
1813	2746.69922
1803	2745.3833
1793	2743.37061
1783	2742.52539
1773	2741.59668
1763	2738.89111
1753	2737.51123
1743	2736.0415
1733	2734.95947
1723	2733.3418
1713	2730.91846
1703	2729.91895
1693	2728.83545
1683	2727.4502
1673	2725.62451
1663	2724.36719
1653	2721.99902
1643	2721.29639
1633	2719.65039
1623	2718.38525
1613	2716.53271
1603	2714.53369
1593	2713.14648
1583	2712.84131
1573	2711.29053
1563	2709.0498
1553	2707.83887
1543	2706.30566
1533	2705.24561
1522	2703.21094
1513	2701.79883