Marine Geoscience Data System

Seismic Reflection/Refraction Data at the Academic Seismic Portal

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EW9416

Maurice Ewing

Processed

Acquisition Information

Processed Data Sets

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Seismic:Navigation

Reprocessed multichannel seismic data across ODP Site 504B in the eastern Pacific Ocean, acquired in 1994 during the R/V Marcus Ewing survey EW9416

Platform Info

Array:Maurice Ewing

LDEO

Device Info

Seismic:MCS

Events

Line Log

Locale

File Format

ASCII

Quality

Christeson, Gail

Data Set References

Seismic:Reflection:MCS

Data DOI: 10.1594/IEDA/500070

Reprocessed multichannel seismic data across ODP Site 504B in the eastern Pacific Ocean, acquired in 1994 during the R/V Marcus Ewing survey EW9416

Platform Info

Array:Maurice Ewing

LDEO

Device Info

Seismic:MCS

Events

Line Log

Locale

File Format

SEGY

Quality

Christeson, Gail

Data Set References

Seismic:Reflection:MCS

Reprocessed multichannel seismic data across ODP Site 504B in the eastern Pacific Ocean, acquired in 1994 during the R/V Marcus Ewing survey EW9416

Platform Info

Array:Maurice Ewing

LDEO

Device Info

Seismic:MCS

Events

Line Log

Locale

File Format

PDF

Quality

Christeson, Gail

Data Set References

Event Logs

Line (EW9416)

Device Info

Related Devices

Mutter, Carolyn

LDEO

Line (EW9416)

Device Info

Related Devices

Detrick, Robert

WHOI

Line (EW9416)

Device Info

Seismic:MCS

Platform: Maurice Ewing (Array)

Stephen, Ralph

Station:Surface (EW9416)

Device Info

Seismic:MCS

LDEO

Platform: Maurice Ewing (Array)

Seismic:Sonobuoy

Platform: Maurice Ewing (Array)

Detrick, Robert

WHOI

Seismic Acquisition Parameters

Download As Text

EW9416_ACQ001 (Lines: All Costa Rica Rift lines 1267-1285)

Source Information

AirGun (BOLT:1500C)

Source Number: 10

Volume (cu in): 3005

Pressure (psi): 2000

Depth (m): 7

Shot Interval (sec): 13

Distance to Near Channel (m): 187

Distance to Antenna (m): 88

Number of Arrays: 1

Receiver Information

Hydrophone:Streamer

Number of Cables: 1

Channels Per Cable: 160

Channels Recorded: 160

Group Spacing (m): 25

Cable Length (m): 4000

Cable Depth (m): 10

Near Channel Number: 160

Used Active Tail Buoy: false

Used Compass Birds: true

Nav System

GPS, transit satellite fix, Furuno

WGS84

Acquisition System

Digital

Name: DMS2000

Sample Interval (msec): 2

Record Length (sec): 10

Details

The line numbers 1267-1285 were assigned at LDEO after the cruise.

The list below shows the correspondence between those numbers and the

'CRR' line numbers used at sea

LDEO AT SEA -- SHOTS

1267 (CRR01 B) 2-1026

1268 (CRR02 C) 110-1041

1269 (CRR03 A) 102-1393

1270 (CRR04 E) 102-805

1271 (CRR04 E) 812-1271

1272 (CRR04 E) 1272-1661

1273 (CRR04 E) 1662-2289

1274 (CRR04 E) 2290-3850

1275 (CRR09 B) 104-649

1276 (CRR09 B) 650-1805

1277 (CRR09 B) 1806-2316

1278 (CRR12 ) 101-2266

1279 (CRR12 ) 2267-2846

1280 (CRR12 B) 101-1261

1281 (CRR12 B) 1262-1764

1282 (CRR13 ) 101-4216

1283 (CRR14 ) 101-722

1284 (CRR14 ) 723-1800

1285 (CRR14 ) 1801-2565

EW9416_ACQ002 (Lines: Hole 504B Survey: lines 1-2)

Source Information

AirGun (BOLT:1500C)

Source Number: 10

Volume (cu in): 3005

Shot Interval (sec): 15

Distance to Near Channel (m): 187

Distance to Antenna (m): 88

Number of Arrays: 1

Receiver Information

Hydrophone:Streamer

Number of Cables: 1

Channels Per Cable: 160

Channels Recorded: 160

Group Spacing (m): 25

Cable Length (m): 4000

Cable Depth (m): 9

Near Channel Number: 160

Used Active Tail Buoy: false

Used Compass Birds: true

Nav System

GPS, transit satellite fix, Furuno

WGS84

Acquisition System

Digital

Name: DMS2000

Sample Interval (msec): 2

Record Length (sec): 10

Details

Source depth: 7-10 meters

EW9416_ACQ003 (Lines: Hole 504B Survey: SCS lines 3-16)

Source Information

AirGun (BOLT:1500C)

Number of Arrays: 1

Receiver Information

Hydrophone:Streamer

Number of Cables: 1

Cable Length (m): 137

Used Active Tail Buoy: false

Nav System

GPS, transit satellite fix, Furuno

WGS84

Acquisition System

Digital

Name: DMS2000

Sample Interval (msec): 2

Record Length (sec): 6

Details

Single Channel Streamer Details from Cruise Report:"The SCS streamer is configured with a 188 m leader, a 25 m stretch section, and four active sections totaling 137 m (12.5 m, 25 m, 50 m and 50 m). The data are recorded on DMS2000 data tapes on channels 4 (raw data) and channel 5 (attenuated by a factor of 20 across the entire frequency band of 0-160 Hz) (note: a total of 8 channels are recorded on the data tape, channels 1-3 and 6-8 are dummy channels)." NOTE: We assume the 4 streamer sections were summed before being recorded. There are actually 12 traces for each single channel line on tape

Source volume: 3005 cu. in. lines 3-4,6-9,10A-16, 8420 cu. in. lines 5,10

Source Number: 10 guns lines 3-4,6-9,10A-16, 20 guns used for lines 5,10

Source Depth: 5-6 meters

Shot Interval: 13 sec for lines 3-4,6-9,11-13,16

65 sec interval for line 5 shots 102-497

65 sec interval for line 10 shots 101-453

65 sec interval for lines 10A,14,15

43 sec interval for line 5 shots 498-1062

84 sec interval for line 10 shots 454-812

edu.utexas.ig:ew9416_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: DMS 2000

Details

Receiver Type: Hydrophone_Streamer

Source Type: SeismicSource_Gun_Air

Acquisition System Name: DMS 2000

Acquisition System Type: digital

Seismic Nav System: null

Survey Datum: WGS84

Source to Near Channel (m): 187

Antenna to Source (m): 88

Number of Channels Recorded: 160

Channel Length (m): 25

Cable Receiver Depth (m): 10

Source Volume (cubicInches): 3005

Source Pressure (bars): 138

Source Number: 10

Source Depth (m): 7

Shot Control: time

Shot Interval (s or m): 13

Compass Birds: no

Tail Buoy Positioning: no

Recording Delay: no

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