Marine Geoscience Data System

Seismic Reflection/Refraction Data at the Academic Seismic Portal

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Expeditions / Compilations

MGL1212

Marcus G. Langseth

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Acquisition Information

Raw Data Sets

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Seismic:Navigation:ShotTime

Data DOI: 10.1594/IEDA/318994

Seismic Shot Point Navigation Data from the Cascadia Subduction Zone acquired during the R/V Marcus G. Langseth expedition MGL1212 (2012)

Platform Info

Array:Marcus G. Langseth

LDEO

Device Info

Seismic:MCS

LDEO

Events

Line Log

Locale

Cascadia

FocusSite:GeoPRISMS

File Format

ASCII

Quality

Details

Spectra shot logs

Holbrook, W. Steven

University of Wyoming

Kent, Graham

UNR

Keranen, Kathleen

Seismic:Reflection:MCS

Data DOI: 10.1594/IEDA/318981

Multi-Channel Seismic Shot Data from the Cascadia Subduction Zone acquired during the R/V Marcus G. Langseth expedition MGL1212 (2012)

Platform Info

Array:Marcus G. Langseth

LDEO

Device Info

Seismic:MCS

LDEO

Events

Line Log

Locale

Cascadia

FocusSite:GeoPRISMS

File Format

SEGD

Quality

Holbrook, W. Steven

University of Wyoming

Kent, Graham

UNR

Keranen, Kathleen

Data Set References

Event Logs

Line (MGL1212)

Device Info

Related Devices

Holbrook, W. Steven

University of Wyoming

Line (MGL1212)

Device Info

Seismic:MCS

Platform: Marcus G. Langseth (Array)

Holbrook, W. Steven

University of Wyoming

Station:WaterColumn:Released (MGL1212)

Device Info

Probe:Expendable:XBT

Sippican:T-5

Platform: Marcus G. Langseth

Holbrook, W. Steven

University of Wyoming

Station:WaterColumn:Released (MGL1212)

Device Info

Probe:Expendable:XBT

Sippican:T-7

Platform: Marcus G. Langseth

Holbrook, W. Steven

University of Wyoming

Station:WaterColumn:Released (MGL1212)

Device Info

Probe:Expendable:XBT

Sippican:T-4

Platform: Marcus G. Langseth

Holbrook, W. Steven

University of Wyoming

Station:WaterColumn:Released (MGL1212)

Device Info

Probe:Expendable:XCTD

Sippican:XCTD-1

Platform: Marcus G. Langseth

Holbrook, W. Steven

University of Wyoming

Seismic Acquisition Parameters

Download As Text

MGL1212_ACQ001 (Lines: Sequences 1-10, 25)

Source Information

AirGun (BOLT:1500LL)

Pressure (psi): 2000

Depth (m): 15

Shot Interval (m): 50

Distance to Near Channel (m): 264

Distance to Antenna (m): 240

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): 15

Near Channel Number: 636

Used Active Tail Buoy: true

Used Compass Birds: true

Nav System

C-Nav 3050

WGS84

Acquisition System

Digital

Name: Sercel Syntrak 960

Sample Interval (msec): 2

Record Length (sec): 16.384

Details

Source Volume was 6600 cu.in. for Sequences 1-10

Source Volume was 3300 cu.in. for Sequence 25

Source Number was not provided, but was likely 36 airguns for Sequences 1-10, and 18 airguns for Sequence 25

MGL1212_ACQ002 (Lines: Sequences 11-23, 24)

Source Information

AirGun (BOLT:1500LL)

Pressure (psi): 2000

Depth (m): 9

Shot Interval (m): 50

Distance to Near Channel (m): 264

Distance to Antenna (m): 240

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

WGS84

Acquisition System

Digital

Name: Sercel Syntrak 960

Sample Interval (msec): 2

Record Length (sec): 16.384

Details

Source Volume was 6600 cu.in. for Sequences 11-23

Source Volume was 3300 cu.in. for Sequence 24

Source Number was not provided, but was likely 36 airguns for Sequences 11-23, and 18 airguns for Sequence 24

org.marine-geo:MGL1212_ACQ001 (Lines: )

Source Information

AirGun

Receiver Information

NotApplicable

Used Active Tail Buoy: true

Used Compass Birds: true

Nav System

C-Nav 3050 primary

WGS84

Acquisition System

Digital

Name: Sercel Syntrak 960

Details

Receiver Type: Hydrophone:Streamer

Source Type: SeismicSource_Gun_Air

Acquisition System Name: Sercel Syntrak 960

Acquisition System Type: null

Seismic Nav System: C-Nav 3050 primary

Survey Datum: WGS84

Source to Near Channel (m): 264

Antenna to Source (m): 240

Number of Channels Recorded: 636

Channel Length (m): 12.5

Cable Receiver Depth (m): 15: sequences1-20, 25; 9: seq 11-23, 24

Source Volume (cubicInches): 6600: seq 1-10, 11-23; 3300: seq 24, 25

Source Pressure (bars): 138

Source Number: 1

Source Depth (m): 15: sequences1-20, 25; 9: seq 11-23, 24

Shot Control: null

Shot Interval (s or m): null

Compass Birds: yes

Tail Buoy Positioning: yes

Recording Delay: no

org.marine-geo:mgl1212_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: Sercel Syntrak 960

Details

Receiver Type: Hydrophone_Streamer

Source Type: SeismicSource_Gun_Air

Acquisition System Name: Sercel Syntrak 960

Acquisition System Type: digital

Seismic Nav System: C-Nav 3050 primary

Survey Datum: WGS84

Source to Near Channel (m): 172: sequences 7-15; 272: sequences 16-27

Antenna to Source (m): 232

Number of Channels Recorded: 636

Channel Length (m): 12.5

Cable Receiver Depth (m): 9

Source Volume (cubicInches): 6600; 3300: sequence 21

Source Pressure (bars): 138

Source Number: 40

Source Depth (m): 9: sequences 7-15, 16-27

Shot Control: distance

Shot Interval (s or m): 37.5: sequences 7-13, 16-22, 150: seq 14, 24-26; 500: seq 23, 27

Compass Birds: yes

Tail Buoy Positioning: yes

Recording Delay: no

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