Table 1 Acquisition and processing parameters of used seismic data.

Seismic source

3 GI-guns

2 GI-guns

1 GI-gun

Streamer

240 channel, 3000 m active length

96 channels, 600 m active length

Single channel

Recording parameters

1 ms sample rate, 10 s record length

1 ms sample rate, 5 s record length

0.25 ms sample rate, 2 s record length

Processing parameters

25 m CDP interval, velocity analysis, nmo correction, multiple suppression fk filter, stacking, time migration

25 m CDP interval, velocity analysis, nmo correction, multiple suppression fk filter, stacking, time migration

Display parameters

Water column mute, bandpass filter 20–200 Hz

Water column mute, bandpass filter 20–200 Hz

Water column mute, bandpass filter 20–200 Hz