EW0210 Magnetic:Anomaly:IGRF

Ship-based Magnetic Anomaly data from the Gulf of California acquired during the Maurice Ewing PESCADOR expedition EW0210 in 2002 (investigator Daniel Lizarralde)

This magnetic anomaly raw data set was acquired with a towed magnetometer during the Maurice Ewing PESCADOR expedition EW0210 conducted in 2002 (Chief Scientist: Dr. Dan Lizarralde). The data file is in Text File (ASCII) format. The data set was acquired as part of the projects: Seismic and Geologic Study of Gulf of California Rifting and Magmatism; Sea of Cortez Continental Extension and Rifting; and, The PESCADOR Seismic Experiment. Funding was provided by NSF grants OCE01-11738, OCE01-11983, OCE01-12058, OCE01-12149, and OCE01-12152.

Lizarralde, Dan

Investigator

Georgia Institute of Technology

Device Info

Magnetometer

Platform

Maurice Ewing

LDEO

Awards

Data DOI

Quality

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

Report Incorrect Information

Data Files

Documents

Data Citation Information

ISO/XML Metadata

Seismic Acquisition Parameters

Download as Text: EW0210

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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