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Processed multichannel seismic data along the the Aleutian Trench, acquired by the R/V Marcus G. Langseth (MGL1110) in 2011 as part of the ALEUT (Alaska Langseth Experiment to Understand the megaThrust) program
This 2011 R/V Langseth expedition surveyed the Aleutian Trench as part of the ALEUT (Alaska Langseth Experiment to Understand the megaThrust) program. The objective was to acquire multichannel and wide angle reflection data over a large portion of the Alaska-Aleutian subduction zone in order to locate the downdip limit of the seismogenic zone. Funded by NSF grant OCE-0926614.
Bécel, Anne
Investigator
LDEO
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
Shillington et al., 2015 Link between plate fabric, hydration and subduction zone seismicity in Alaska Nat. Geosci. 8. doi: 10.1038/ngeo2586
Li et al., 2015 Downdip variations in seismic reflection character: Implications for fault structure and seismogenic behavior in the Alaska subduction zone JGR Solid Earth . doi: 10.1002/2015JB012338
Abadi et al., 2017 Estimating the location of baleen whale calls using dual streamers to support mitigation procedures in seismic reflection surveys PLoS ONE 12. doi: 10.1371/journal.pone.0171115
Becel et al., 2015 Origin of dipping structures in fast-spreading oceanic lower crust offshore Alaska imaged by multichannel seismic data Earth and Planetary Science Letters 424. doi: 10.1016/j.epsl.2015.05.016
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: MGL1110
MGL1110_ACQ001 (Lines: Sequence numbers 8-10)
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): 325.84
Distance to Antenna (m): 222.7
Number of Arrays: 1
Receiver Information
Hydrophone:Streamer
Number of Cables: 2
Channels Per Cable: 636
Channels Recorded: 1272
Group Spacing (m): 12.5
Cable Spacing (m): 450
Cable Length (m): 7950
Used Active Tail Buoy: true
Used Compass Birds: true
Nav System
CNAV 3050 - primary
WGS84
Acquisition System
Digital
Name: Syntron Syntrak 960
Sample Interval (msec): 2
Record Length (sec): 22.528
Details
Near channel numbers were 636 and 1272
Streamer 1 was towed at a depth of 9m, Streamer 2 at 12m
MGL1110_ACQ002 (Lines: Sequence numbers 11-26)
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 Antenna (m): 222.7
Number of Arrays: 1
Receiver Information
Hydrophone:Streamer
Number of Cables: 2
Channels Per Cable: 636
Channels Recorded: 1272
Group Spacing (m): 12.5
Cable Spacing (m): 225
Cable Length (m): 7950
Used Active Tail Buoy: true
Used Compass Birds: true
Nav System
CNAV 3050 - primary
WGS84
Acquisition System
Digital
Name: Syntron Syntrak 960
Sample Interval (msec): 2
Details
Streamer 1 was towed at a depth of 9m, Streamer 2 at 12m
Streamer 1 was towed from the stern, distance from center of source to near group was 235.68m
Streamer 2 was towed from the paravane, distance from center of source to near group was 325.84m
Near channel numbers were Streamer 1: 636 and Streamer 2 : 1272
Lines 11-26 were recorded for 22.528s except for part of Line 24 which was recorded only for 18.430s
MGL1110_ACQ003 (Lines: Sequence numbers 27-33)
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): 325.84
Distance to Antenna (m): 222.7
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): 12
Near Channel Number: 636
Used Active Tail Buoy: true
Used Compass Birds: true
Nav System
CNAV 3050 - primary
WGS84
Acquisition System
Digital
Name: Syntron Syntrak 960
Sample Interval (msec): 2
Details
Data was recorded by a single streamer, Streamer 2, towed from the paravane
Distance from center of source to near group was 325.84m
Lines 27-33 were recorded for 22.528s except for part of Line 29 which was recorded only for 18.430s
org.marine-geo:MGL1110_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: null
Seismic Nav System: null
Survey Datum: WGS84
Source to Near Channel (m): 235.68
Antenna to Source (m): 222.7
Number of Channels Recorded: null
Channel Length (m): null
Cable Receiver Depth (m): null
Source Volume (cubicInches): 6600
Source Pressure (bars): null
Source Number: 10
Source Depth (m): null
Shot Control: null
Shot Interval (s or m): null
Compass Birds: no
Tail Buoy Positioning: no
Recording Delay: no
Data Set Documents
Line
mgl1110_B15_MCS_line_log.pdf (62.0kB)
PDF
Towing Offset
mgl1110_Towing_Offsets.pdf (231.0kB)
PDF
Cruise (no appendices)
cruise_report_mgl1110.pdf (57.9MB)
PDF
Cruise (with appendices)
mgl1110.cruiserpt.pdf (205.8MB)
PDF
MGL1110 Documents
Cruise Blog
Go to site
HTML
Daily Field
MGL1110_Daily_Field_Report.pdf (340.0kB)
PDF
MCS Lines
MGL1110_B15_MCS_line_log.pdf (62.0kB)
PDF
MCS Observer Watch
MGL1110_MCS_Observer_Watch.pdf (781.0kB)
PDF
Navigation Watch
MGL1110_Navigation_Watch_Log.pdf (211.0kB)
PDF
Cruise (no appendices)
cruise_report_mgl1110.pdf (57.9MB)
PDF
Cruise (with appendices)
mgl1110.cruiserpt.pdf (205.8MB)
PDF
USGS: Processing Steps and Navigation Notes
Data Collection Summary
MGL1110_DataReport_v1.3.pdf (1.3MB)
PDF
MCS Tow Offset Configuration
MGL1110_Towing_Offsets.pdf (231.0kB)
PDF
Related Data Sets
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Seismic:Reflection:MCS
Data DOI:
10.1594/IEDA/500169
Processed multichannel seismic data along the the Aleutian Trench, acquired by the R/V Marcus G. Langseth (MGL1110) in 2011 as part of the ALEUT (Alaska Langseth Experiment to Understand the megaThrust) program
Locale
File Format
SEGY
Quality
2
Processed multichannel seismic data along the the Aleutian Trench, acquired by the R/V Marcus G. Langseth (MGL1110) in 2011 as part of the ALEUT (Alaska Langseth Experiment to Understand the megaThrust) program
Locale
File Format
PDF
Quality
2
Bécel, Anne
LDEO
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