Marine Geoscience Data System

Seismic Reflection/Refraction Data at the Academic Seismic Portal

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Expeditions / Compilations

MGL1109

Marcus G. Langseth

Norseman_1101

Norseman II

Processed

Acquisition Information

Processed Data Sets

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Seismic:WideAngle:OBS

Data DOI: 10.26022/IEDA/331031

Processed OBS seismic refraction data (SEG-Y format) from the 2011 Gulf of Alaska U.S. Extended Continental Shelf (ECS) Survey, cruise MGL1109

Platform Info

Array:Marcus G. Langseth

LDEO

Device Info

Seismic:OBS

Events

Station:Bottom:Deployed Log

Locale

Alaska:GulfOfAlaska

Gulf

File Format

SEGY

Quality

Christeson, Gail

Gulick, Sean

UTIG

Barth, Ginger

USGS

Walton, Maureen

USN:NRL

Data Set References

Seismic:WideAngle:OBS

Data DOI: 10.26022/IEDA/331070

Processed OBS seismic refraction profile images (PNG format) from the 2011 Gulf of Alaska U.S. Extended Continental Shelf (ECS) Survey, cruise MGL1109

Platform Info

Array:Marcus G. Langseth

LDEO

Device Info

Seismic:OBS

Events

Station:Bottom:Deployed Log

Locale

Alaska:GulfOfAlaska

Gulf

File Format

PNG

Quality

Christeson, Gail

Gulick, Sean

UTIG

Barth, Ginger

USGS

Walton, Maureen

USN:NRL

Data Set References

Event Logs

Line (MGL1109)

Device Info

Related Devices

Barth, Ginger

USGS

Line (MGL1109)

Device Info

Seismic:MCS

Platform: Marcus G. Langseth (Array)

Seismic:OBS

Platform: Marcus G. Langseth (Array)

Barth, Ginger

USGS

Station:Bottom:Deployed (Norseman_1101)

Device Info

Related Devices

Tate, George

USGS

Station:WaterColumn:Released (MGL1109)

Device Info

Probe:Expendable:XBT

Sippican:T-5

Platform: Marcus G. Langseth

Childs, Jonathan

USGS

Station:WaterColumn:Released (MGL1109)

Device Info

Probe:Expendable:XBT

Sippican:T-7

Platform: Marcus G. Langseth

Childs, Jonathan

USGS

Station:WaterColumn:Released (MGL1109)

Device Info

Probe:Expendable:XCTD

Sippican:XCTD-1

Platform: Marcus G. Langseth

Childs, Jonathan

USGS

Station:WaterColumn:Released (MGL1109)

Device Info

Probe:Expendable:XCTD

Sippican:XCTD-2

Platform: Marcus G. Langseth

Childs, Jonathan

USGS

Seismic Acquisition Parameters

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MGL1109_ACQ001 (Lines: MCS lines 1-14)

Source Information

AirGun (BOLT:1500LL)

Source Number: 36

Volume (cu in): 6600

Pressure (psi): 6600

Depth (m): 9

Distance to Near Channel (m): 176

Distance to Antenna (m): 399.1

Number of Arrays: 1

Receiver Information

Hydrophone:Streamer

Number of Cables: 1

Channels Per Cable: 636

Channels Recorded: 636

Group Spacing (m): 12.5

Cable Length (m): 7950

Cable Depth (m): 9

Near Channel Number: 636

Used Active Tail Buoy: true

Used Compass Birds: true

Nav System

C-Nav 3050 primary

WGS84

Acquisition System

Digital

Name: Syntron Syntrak 960

Sample Interval (msec): 2

Record Length (sec): 16

Details

Line 5 (MCS04A) was shot by Time at 30 second intervals, lines 1-4 and 5-15 were shot by Distance at 50m spacing

Airguns Bolt 1500LL and 1900LL were used.

MGL1109_ACQ002 (Lines: Lines 15 and 16)

Source Information

AirGun (BOLT:1500LL)

Source Number: 36

Volume (cu in): 6600

Pressure (psi): 6600

Depth (m): 9

Shot Interval (m): 150

Distance to Near Channel (m): 176

Distance to Antenna (m): 399.1

Number of Arrays: 1

Receiver Information

Hydrophone:Streamer

Number of Cables: 1

Group Spacing (m): 12.5

Cable Depth (m): 9

Near Channel Number: 636

Used Active Tail Buoy: true

Used Compass Birds: true

Nav System

C-Nav 3050 primary

WGS84

Acquisition System

Digital

Name: Syntron Syntrak 960

Sample Interval (msec): 2

Record Length (sec): 16

Details

Lines 15 and 16 were also recorded by OBS

At Line 16 shotpoint 2009, the streamer was shortened to 5850m (468 channels)

Airguns Bolt 1500LL and 1900LL were used.

MGL1109_ACQ003 (Lines: Lines 17-19)

Source Information

AirGun (BOLT:1500LL)

Source Number: 36

Volume (cu in): 6600

Pressure (psi): 6600

Depth (m): 9

Shot Interval (m): 50

Distance to Near Channel (m): 176

Distance to Antenna (m): 399.1

Number of Arrays: 1

Receiver Information

Hydrophone:Streamer

Number of Cables: 1

Channels Per Cable: 468

Channels Recorded: 468

Group Spacing (m): 12.5

Cable Length (m): 5850

Cable Depth (m): 9

Near Channel Number: 468

Used Active Tail Buoy: true

Used Compass Birds: true

Nav System

C-Nav 3050 primary

WGS84

Acquisition System

Digital

Name: Syntron Syntrak 960

Sample Interval (msec): 2

Record Length (sec): 16

Details

Airguns Bolt 1500LL and 1900LL were used.

org.marine-geo:MGL1109_ACQ001 (Lines: )

Source Information

AirGun

Receiver Information

Hydrophone:Streamer

Used Active Tail Buoy: true

Used Compass Birds: true

Nav System

C-Nav 3050 primary

WGS84

Acquisition System

Digital

Name: Syntron Syntrak 960

Details

Receiver Type: Hydrophone_Streamer

Source Type: SeismicSource_Gun_Air

Acquisition System Name: Syntron Syntrak 960

Acquisition System Type: digital

Seismic Nav System: C-Nav 3050 primary

Survey Datum: WGS84

Source to Near Channel (m): 176

Antenna to Source (m): 399.1

Number of Channels Recorded: 636

Channel Length (m): 12.5

Cable Receiver Depth (m): null

Source Volume (cubicInches): 6600

Source Pressure (bars): null

Source Number: 36

Source Depth (m): 9

Shot Control: distance: lines 1-4, 5-19; time: line MCS04A

Shot Interval (s or m): 50m: lines 1-4, 5-14, 17-19; 150m: lines 15-16; 30s: line MCS04A

Compass Birds: yes

Tail Buoy Positioning: yes

Recording Delay: no

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