Multi-channel boomer seismic dataset from Fiordland, NZ

General Information

Processed multi-channel boomer seismic reflection dataset acquired across Fiordland, between 2018 and 2024 aboard RV Polaris II, Tutoko II, and BreakSea Girl. The dataset comprises along- and across-fjord profiles collected during multiple research cruises. Standard seismic processing workflows were applied using GLOBE Claritas. 

Acquisition Parameters

Source Systems: Ferranti Ocean Research Equipment (ORE) Geopulse Boomer System (Model 5420A) (used until cruise                             22TU0627)                          Applied Acoustics (AA) Boomer (Model AA301) (used from cruise 22PL1028 onward)Streamer: 24 channel Geometrics MicroEel streamer (75 m length)Boomer frequency: 0.3-3 kHz (ORE); 0.5-6 kHz (AA)Sample interval: 250 ms (18PL_); 125 ms

Navigation

Source coordinates stored in SEGY headersX-coordinate: byte 197Y-coordinate: byte 201Coordinate Reference System: NZTM (New Zealand Transverse Mercator)Big endian byte order

Processing Workflow

Standard multichannel seismic processing workflows were applied to all profiles. Processing steps included:

Bandpass filtering 

Spherical Divergence Correction

Despiking

Static Corrections

Normal Moveout Correction

Common Midpoint Stacking

Swell Noise Attenuation

Predictive Deconvolution

Time Migration

Profiles included

Milford Sound

22PL1028_106

George Sound

23PL0515_201

Charles Sound

23PL0515_203

Nancy Sound

24BG0604_103

Doubtful Sound Complex

22TU0627_03

22TU0627_06

22TU0627_07

22TU0627_12

23PL0515_206

24BG0604_101

24BG0604_109

Dagg Sound

23PL1101_104

23PL1101_105

Dusky Sound Complex

21PL0415_01

21PL0415_02

21PL0415_04

24BG0604_107

24BG0604_108

Preservation Inlet Complex

18PL164_08

22PL1028_109

23PL1101_101

Supplementary material for Unland et al. (2025) and other ongoing work (to be added). Compositional single-channel boomer datas is available on Zenodo.

Reference

Unland, E., Gorman, A. R., Barnes, P. M., Moy, C., Bowman, H., Wilson, G., et al. (2025). Exploring the Submarine Geomorphology of Te Rua-o-te-Moko Fiordland, Aotearoa New Zealand.