Marine Geoscience Data System

Seismic Reflection/Refraction Data at the Academic Seismic Portal

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Expeditions / Compilations

EW0210

Maurice Ewing

Processed

Acquisition Information

Processed Data Sets

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Bathymetry:Singlebeam, Gravity:Field

Data DOI: 10.1594/IEDA/314828

Ship-based Trackline Geophysical Data (MGD77) from the Gulf of California acquired during the Maurice Ewing expedition EW0210 (2002)

Platform Info

Maurice Ewing

LDEO

Device Info

Sonar:Multibeam

Atlas:Hydrosweep DS2

Gravimeter

BellAerospace:BGM-3

Locale

GulfOfCalifornia

Gulf

File Format

MGD77

Quality

Lizarralde, Dan

Georgia Institute of Technology

Data Set References

Event Logs

Line (EW0210)

Device Info

Related Devices

Lizarralde, Dan

Georgia Institute of Technology

Line (EW0210)

Device Info

Seismic:MCS

Platform: Maurice Ewing (Array)

Lizarralde, Dan

Georgia Institute of Technology

Station:Bottom (BAJA02NH)

Device Info

Related Devices

Gorman, Andrew

Seismic Acquisition Parameters

Download As Text

EW0210_ACQ001 (Lines: All lines (sequences) 1-39)

Source Information

AirGun (BOLT:1500C)

Source Number: 20

Pressure (psi): 2000

Distance to Antenna (m): 55.3

Number of Arrays: 1

Receiver Information

Hydrophone:Streamer

Number of Cables: 1

Channels Per Cable: 480

Channels Recorded: 480

Group Spacing (m): 12.5

Cable Length (m): 6000

Near Channel Number: 480

Used Active Tail Buoy: true

Used Compass Birds: true

Nav System

p-code GPS used early in cruise, then WAAS GPS

WGS84

Acquisition System

Digital

Name: SYNTRAK 480

Sample Interval (msec): 4

Record Length (sec): 16.384

Details

Source Volume for Sequences 1-13 was 8490cu.in.

Source Volume for Sequences 14-39 was 7610cu.in.(from diagram)

Source Depth is unknown

Source to Near Channel was 179.25 meters for Sequences 1-25, 25-39

Source to Near Channel for Line 26 was -20m when no tow/stretch section was available

Shot Interval was 50m for Sequences 01,04-10,13,14.001-14.002(shots 17661-22203),16,27,28,29,30,38,39

Shot Interval was 100m for Sequences 19,20,21,24,25.26,31,32,33

Shot Interval was 150m for Sequences 02,03,11,12,14.003(shots 23725-24985),15,17,18,34,35,36,37

Shot Interval was likely 37.5m for Sequences 22,23

edu.utexas.ig:ew0210_acq001 (Lines: )

Source Information

AirGun

Receiver Information

Hydrophone:Streamer

Used Active Tail Buoy: false

Used Compass Birds: false

Nav System

WGS84

Acquisition System

Digital

Name:

Details

Receiver Type: Hydrophone_Streamer

Source Type: SeismicSource_Gun_Air

Acquisition System Name: null

Acquisition System Type: digital

Seismic Nav System: null

Survey Datum: WGS84

Source to Near Channel (m): null

Antenna to Source (m): null

Number of Channels Recorded: 480

Channel Length (m): 12.5

Cable Receiver Depth (m): null

Source Volume (cubicInches): 7860

Source Pressure (bars): null

Source Number: 20

Source Depth (m): null

Shot Control: distance

Shot Interval (s or m): 50: Northwest of Alarcón Rise; 60-fold data with 6.25 m CMP spacing; 150: South of Alarcón Rise; CMP spacing doubled to 12.5 m; yielding 40 fold data (Sutherland; 2006).

Compass Birds: no

Tail Buoy Positioning: no

Recording Delay: no

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