MGL1212 Seismic Reflection/Refraction

Seismic:Navigation

Seismic Navigation Data (P2 format) from the Cascadia Subduction Zone acquired during the R/V Marcus G. Langseth expedition MGL1212 (2012)

This data set was acquired with the LDEO Multi-Channel Seismic system during R/V Marcus G. Langseth expedition MGL1212 conducted in 2012 (Chief Scientist: Dr. W. Steven Holbrook). These Seismic Navigation data files are of UKOOA P2/94 format. Data were acquired as part of the projects: RAPID: Collaborative Research: A Short, Open-Access 2D MCS Acquisition Program off Washington State and COAST - Cascadia Open-Access Seismic Transects, and funding was provided by NSF grants: N000141010175, OCE11-47762, OCE11-47841, OCE11-49095, OCE11-50628, and OCE11-53563.

Holbrook, W. Steven

Investigator

University of Wyoming

Kent, Graham

Investigator

UNR

Keranen, Kathleen

Investigator

Device Info

Seismic:MCS

LDEO

Platform

Marcus G. Langseth (Array)

LDEO

Awards

N000141010175

OCE11-50628

Data DOI

10.1594/IEDA/318988

Quality

Data have not been processed or modified since acquisition (e.g. Realtime navigation or sonar data, raw images etc.).

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Data Files

Acquisition Information

Documents

Data Citation Information

Related Data Sets

ISO/XML Metadata

Related Acquisition Information

MGL1212

Line Log

Seismic Acquisition Parameters

Download as Text: MGL1212

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

Related Data Sets

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Seismic:Navigation

Data DOI: 10.1594/IEDA/318985

Raw Seismic Navigation Data (P1 format) 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

Quality

Details

These are raw, unprocessed P190 navigation files. Processed P190 navigation files exist (quality=1) and should be used for processing MCS data instead of these files.

Holbrook, W. Steven

University of Wyoming

Kent, Graham

UNR

Keranen, Kathleen

Seismic:Navigation

Data DOI: 10.1594/IEDA/318991

Processed Seismic Navigation Data (version 1) 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

Quality

Details

These processed (quality=1) P190 navigation files should be used for processing the MCS data.

Holbrook, W. Steven

University of Wyoming

Kent, Graham

UNR

Keranen, Kathleen

Data Set References

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

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