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Ocean bottom seismometer (OBS) data in the Gulf of Alaska acquired during R/V Marcus G. Langseth expedition MGL11109 (2011)
This R/V Langseth expedition to the Gulf of Alaska was funded through the USGS by the United States Extended Continental Shelf program to assess potential US claims under the Convention on the Law of the Sea. The survey objectives were to investigate the thickness of the sediments in the distal Surveyor and Baranof fans.
Christeson, Gail
Investigator
Device Info
Seismic:
Platform
Marcus G. Langseth (Array)
LDEO
Quality
2
The data have been processed/modified to a level beyond that of basic quality control (e.g. final processed sonar data, photo-mosaics).
Data Files
References
Acquisition Information
Documents
Related Data Sets
ISO/XML Metadata
References
Reece et al., 2013 The role of farfield tectonic stress in oceanic intraplate deformation, Gulf of Alaska J. Geophys. Res. 118. doi: 10.1002/jgrb.50177
Walton et al., 2014 Dynamic response to strike-slip tectonic control on the deposition and evolution of the Baranof Fan, Gulf of Alaska Geosphere 10. doi: 10.1130/GES01034.1
Reece et al., 2012 The effect of plate structure on intraplate volcanism, Kodiak-Bowie Seamount Chain, Gulf of Alaska Conf. Proc. .
Download Data Set Metadata Report
XML
MGDS formatted data set xml report containing verbose file and data set level metadata
ISO XML
ISO 19115-compliant xml report containing general data set level metadata
Related Acquisition Information
Seismic Acquisition Parameters
Download as Text: MGL1109
MGL1109_ACQ001 (Lines: MCS lines 1-14)
Source Information
AirGun (BOLT:1500LL)
Source Number: 36
Volume (cu in): 6600
Pressure (psi): 6600
Depth (m): 9
Distance to Near Channel (m): 176
Distance to Antenna (m): 399.1
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 primary
WGS84
Acquisition System
Digital
Name: Syntron Syntrak 960
Sample Interval (msec): 2
Record Length (sec): 16
Details
Line 5 (MCS04A) was shot by Time at 30 second intervals, lines 1-4 and 5-15 were shot by Distance at 50m spacing
Airguns Bolt 1500LL and 1900LL were used.
MGL1109_ACQ002 (Lines: Lines 15 and 16)
Source Information
AirGun (BOLT:1500LL)
Source Number: 36
Volume (cu in): 6600
Pressure (psi): 6600
Depth (m): 9
Shot Interval (m): 150
Distance to Near Channel (m): 176
Distance to Antenna (m): 399.1
Number of Arrays: 1
Receiver Information
Hydrophone:Streamer
Number of Cables: 1
Group Spacing (m): 12.5
Cable Depth (m): 9
Near Channel Number: 636
Used Active Tail Buoy: true
Used Compass Birds: true
Nav System
C-Nav 3050 primary
WGS84
Acquisition System
Digital
Name: Syntron Syntrak 960
Sample Interval (msec): 2
Record Length (sec): 16
Details
Lines 15 and 16 were also recorded by OBS
At Line 16 shotpoint 2009, the streamer was shortened to 5850m (468 channels)
Airguns Bolt 1500LL and 1900LL were used.
MGL1109_ACQ003 (Lines: Lines 17-19)
Source Information
AirGun (BOLT:1500LL)
Source Number: 36
Volume (cu in): 6600
Pressure (psi): 6600
Depth (m): 9
Shot Interval (m): 50
Distance to Near Channel (m): 176
Distance to Antenna (m): 399.1
Number of Arrays: 1
Receiver Information
Hydrophone:Streamer
Number of Cables: 1
Channels Per Cable: 468
Channels Recorded: 468
Group Spacing (m): 12.5
Cable Length (m): 5850
Cable Depth (m): 9
Near Channel Number: 468
Used Active Tail Buoy: true
Used Compass Birds: true
Nav System
C-Nav 3050 primary
WGS84
Acquisition System
Digital
Name: Syntron Syntrak 960
Sample Interval (msec): 2
Record Length (sec): 16
Details
Airguns Bolt 1500LL and 1900LL were used.
org.marine-geo:MGL1109_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: Syntron Syntrak 960
Details
Receiver Type: Hydrophone_Streamer
Source Type: SeismicSource_Gun_Air
Acquisition System Name: Syntron Syntrak 960
Acquisition System Type: digital
Seismic Nav System: C-Nav 3050 primary
Survey Datum: WGS84
Source to Near Channel (m): 176
Antenna to Source (m): 399.1
Number of Channels Recorded: 636
Channel Length (m): 12.5
Cable Receiver Depth (m): null
Source Volume (cubicInches): 6600
Source Pressure (bars): null
Source Number: 36
Source Depth (m): 9
Shot Control: distance: lines 1-4, 5-19; time: line MCS04A
Shot Interval (s or m): 50m: lines 1-4, 5-14, 17-19; 150m: lines 15-16; 30s: line MCS04A
Compass Birds: yes
Tail Buoy Positioning: yes
Recording Delay: no
Data Set Documents
Line
mgl1109.B15.MCS.line.log.pdf (22.0kB)
PDF
Towing Offset
mgl1109.towing.offsets.pdf (234.0kB)
PDF
Data
mgl1109.OBS.datarpt.pdf (4.5MB)
PDF
MGL1109 Documents
Daily Field
MGL1109_Daily_Field_Report.pdf (358.0kB)
PDF
MCS Lines
MGL1109_B15_MCS_line_log.pdf (22.0kB)
PDF
MCS Observer Watch
MGL1109_MCS_Observer_Watch.pdf (185.0kB)
PDF
Navigation Watch
MGL1109_Navigation_Watch_Log.pdf (242.0kB)
PDF
Data Collection Summary
MGL1109_DataReport_v1.0.pdf (444.0kB)
PDF
MCS Tow Offset Configuration
MGL1109_Towing_Offsets.pdf (234.0kB)
PDF
Related Data Sets
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Ocean bottom seismometer (OBS) data in the Gulf of Alaska acquired during R/V Marcus G. Langseth expedition MGL11109 (2011)
Platform Info
Array:Marcus G. Langseth
LDEO
Device Info
Seismic:
Locale
File Format
PDF
Quality
2
Christeson, Gail
Seismic:WideAngle:OBS
Data DOI:
10.1594/IEDA/500040
Ocean bottom seismometer (OBS) data in the Gulf of Alaska acquired during R/V Marcus G. Langseth expedition MGL11109 (2011)
Platform Info
Array:Marcus G. Langseth
LDEO
Device Info
Seismic:
Locale
File Format
SEGY
Quality
2
Christeson, Gail
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