Multichannel seismic data in the Papua New Guinea forearc region

Multichannel Seismic Data Parameters Acquisition Year: 2021 Cruise Identifier: NORC2020-581 Vessel: R/V Science Study Area and Research Objectives Study Area: Western side of the OJP Research Objectives: Identify the evolution of plate subduction and oceanic plateaus in this region Seismometer Specifications Seismometer Type: NTRS2 offshore multichannel seismometers Developer: Hydroscience (USA) Trace Spacing: 12.5 meters Number of Traces: 168 Sampling Interval: 2 milliseconds Recording Length: 8 seconds Seismic Source Specifications Source Type: GI airgun array Array Volume: 1680 cubic inches Shot Spacing: Approximately 50 meters Bathymetry Data Parameters Acquisition System: Science’s shipboard multibeam bathymetric system Data Processing Steps Multichannel Seismic Data Processing Software Used: Promax commercial software Processing Steps: Observation system definition Drop depth correction Surge suppression Ghost and free surface multiple reflections mitigation Predictive deconvolution Amplitude gain Velocity analysis Radon transform Prestack time offset Poststack denoising Multibeam Data Processing Software Used: Caris software Processing Steps: Auxiliary transducer data editing Sound speed profile correction Singularity rejection Regional bathymetry data generation