MGL1902 - Marine Geoscience Data System

Sensor Data

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Backscatter:Acoustic, Bathymetry:Swath, Sidescan

Device Info

Sonar:Multibeam

Marcus G. Langseth

Repository

NOAA:NCEI

Format

MBSystem

Shillington, Donna

LDEO

Gravity:Field

Device Info

Gravimeter

Marcus G. Langseth

Repository

NOAA:NCEI

Format

ASCII

Shillington, Donna

LDEO

Magnetic:Field

Device Info

Magnetometer

Marcus G. Langseth

Repository

NOAA:NCEI

Format

ASCII

Shillington, Donna

LDEO

Seismic Reflection/Refraction

Device Info

Seismic:OBS

Repository

IRIS

Shillington, Donna

LDEO

Watts, Anthony

University of Oxford

Dunn, Robert

UH:SOEST

Wessel, Paul

UH:SOEST

Ito, Garrett

UH:SOEST

Grevemeyer, Ingo

GEOMAR

ten Brink, Uri

USGS

Miller, Nathan C.

USGS

Related References

Seismic Reflection/Refraction

Device Info

Seismic:MCS

Array:Marcus G. Langseth

Repository

MGDS

Format

P1, P2, SEGD

Shillington, Donna

LDEO

Watts, Anthony

University of Oxford

Dunn, Robert

UH:SOEST

Wessel, Paul

UH:SOEST

Ito, Garrett

UH:SOEST

Grevemeyer, Ingo

GEOMAR

ten Brink, Uri

USGS

Miller, Nathan C.

USGS

Related References

Seismic:Active:Subbottom

Device Info

Seismic:Subbottom

Marcus G. Langseth

Repository

NOAA:NCEI

Format

KEB

Shillington, Donna

LDEO

Temperature, Velocity:Sound

Device Info

Probe:Expendable:XBT

Marcus G. Langseth

Repository

NOAA:NCEI

Format

ASCII

Shillington, Donna

LDEO

Event Logs

Line

Device Info

Seismic:MCS

LDEO

Platform: Marcus G. Langseth (Array)

Shillington, Donna

LDEO

Seismic Acquisition Parameters

Download As Text

MGL1902_ACQ001 (Lines: Sequences 001, 002, and 007 - all OBS only.)

Source Information

AirGun (BOLT:1500LL)

Source Number: 36

Volume (cu in): 6600

Pressure (psi): 2000

Depth (m): 12

Shot Interval (m): 300

Distance to Antenna (m): 230

Number of Arrays: 1

Receiver Information

Seismic:OBS

Used Active Tail Buoy: false

Used Compass Birds: false

Nav System

C-Nav 3050 primary

WGS84

Acquisition System

Digital

Name: OBS

Details

Source was Bolt 1500LL and 1900LL. This set of acquisition parameters was used for airgun shooting to OBS instruments. No streamer was used so there are no cables or channels.

For sequence 007, the shot spacing interval was 400m.

MGL1902_ACQ002 (Lines: MCS/OBS Sequences 003, 004, 005, 006.)

Source Information

AirGun (BOLT:1500LL)

Source Number: 36

Volume (cu in): 6600

Pressure (psi): 2000

Depth (m): 12

Shot Interval (m): 62.5

Distance to Near Channel (m): 207.7

Distance to Antenna (m): 230

Number of Arrays: 1

Receiver Information

Hydrophone:Streamer

Number of Cables: 1

Channels Per Cable: 1188

Channels Recorded: 1188

Group Spacing (m): 12.5

Cable Length (m): 14850

Cable Depth (m): 12

Near Channel Number: 1

Used Active Tail Buoy: true

Used Compass Birds: true

Nav System

C-Nav 3050 primary

WGS84

Acquisition System

Digital

Name: OBS and Sercel Seal 408

Sample Interval (msec): 2

Record Length (sec): 26

Details

Source was Bolt 1500LL and 1900LL. This set of acquisition parameters was used for the four combined MCS/OBS lines.

References

Watts et al., 2020 Evaluation of shipboard and satellite-derived bathymetry and gravity data over seamounts in the northwest Pacific Ocean JGR Solid Earth . doi: 10.1029/2020JB020396

Watts et al., 2021 Seismic structure, Gravity anomalies and Flexure along the Emperor Seamount chain JGR Solid Earth . doi: 10.1029/2020JB021109

Watts et al., 2025 The effective elastic thickness along the Emperor Seamount Chain and its tectonic implications Geophys. J. Int. 240. doi: 10.1093/gji/ggae372

Scientific Personnel

Boston, Brian

Scientist:Postdoctoral

LDEO

Cortes, Valeria

Student:Graduate

Universidad de Chile

Dunn, Robert

Scientist:Co-Chief

UH:SOEST

Filbrandt, Christian

Student:Graduate