Multichannel minisparker seismic-reflection data collected offshore Glacier Bay National Park during USGS field activity 2015-629-FA

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Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Alicia F. Balster-Gee
Originator: Daniel S. Brothers
Originator: Peter J. Haeussler
Originator: Peter Dartnell
Originator: Patrick E. Hart
Originator: Robert Wyland
Originator: Gerry A. Hatcher
Publication_Date: 20230314
Title:

Multichannel minisparker seismic-reflection data collected offshore Glacier Bay National Park during USGS field activity 2015-629-FA

Geospatial_Data_Presentation_Form: seismic-reflection data in SEG-Y format
Series_Information:

Series_Name: data release
Issue_Identification: DOI: 10.5066/P97Q990F

Publication_Information:

Publication_Place:

Pacific Coastal and Marine Science Center, Santa Cruz, California

Publisher: U.S. Geological Survey

Online_Linkage: https://doi.org/10.5066/P97Q990F

Description:

Abstract:

Multichannel seismic reflection data were collected by the U.S. Geological Survey in May of 2015 outside of Palma Bay, Alaska. Seismic data were acquired coincidentally with high resolution bathymetry (Dartnell and others, 2022).

Purpose:

Data were acquired to map the offshore extension of the Queen Charlotte-Fairweather Fault. The fault has produced several significant earthquakes during the last 150 years, yet little to no information exists along most of its length due to its location offshore. We aim to image the fault structure, mode of deformation and constrain its late Holocene slip rate for the northernmost segment.

Supplemental_Information:

Additional information about the field activity from which these data were derived is available online at:
https://cmgds.marine.usgs.gov/fan_info.php?fan=2015-629-FA
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in Esri format, this metadata file may include some Esri-specific terminology.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20150428
Ending_Date: 20150524

Currentness_Reference: ground condition at time data were collected

Status:

Progress: Planned
Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -138.2740000
East_Bounding_Coordinate: -134.95556641
North_Bounding_Coordinate: 58.60833366
South_Bounding_Coordinate: 57.25826466

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:675fe2ed-9234-4bc5-91d3-b40a480da19c

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: geoscientificInformation
Theme_Keyword: location

Theme:

Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: substrate

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: marine geophysics
Theme_Keyword: geospatial datasets
Theme_Keyword: sub-bottom profiling

Theme:

Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: seismic methods
Theme_Keyword: seismic reflection profiling
Theme_Keyword: data processing

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Hazards and Resources Program
Theme_Keyword: CMHRP
Theme_Keyword: Pacific Coastal and Marine Science Center
Theme_Keyword: PCMSC
Theme_Keyword: Alaska Science Center
Theme_Keyword: field activity number 2015-629-FA
Theme_Keyword: Alaska Department of Fish and Wildlife
Theme_Keyword: seismic navigation
Theme_Keyword: seismic reflection
Theme_Keyword: SEG-Y traces

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Pacific Ocean
Place_Keyword: State of Alaska
Place_Keyword: Palma Bay
Place_Keyword: Cross Sound
Place_Keyword: Icy Point
Place_Keyword: Lisianski Inlet
Place_Keyword: Graves Harbor
Place_Keyword: Yakobi Sea Valley

Place:

Place_Keyword_Thesaurus: NGA GEOnet Names Server (GNS)
Place_Keyword: Alexander Archipelago
Place_Keyword: Cross Sound

Access_Constraints: None
Use_Constraints:

USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator of the dataset and in products derived from these data. This information is not intended for navigation purposes.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

U.S. Geological Survey, Pacific Coastal and Marine Science Center

Contact_Person: PCMSC Science Data Coordinator

Contact_Address:

Address_Type: mailing and physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060

Contact_Voice_Telephone: 831-427-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov

Browse_Graphic:

Browse_Graphic_File_Name: 2015-629-FA.overview.map.png
Browse_Graphic_File_Description:

Map of MCS tracklines collected during USGS field activity 2015-629-FA.

Browse_Graphic_File_Type: PNG

Data_Set_Credit:

The authors acknowledge the crew of the R/V Solstice and everyone involved in survey planning and execution.

Native_Data_Set_Environment:

MCS data were recorded in SEG-D rev. 2.1 format (https://seg.org/Portals/0/SEG/News%20and%20Resources/Technical%20Standards/seg_d_rev2.1.pdf) using Geometrics CNT-1 seismic acquisition software (version 5.64). Seismic data were recorded with a 75-meter 24-channel GeoEel streamer towed at approximately 2-meters water depth. A minisparker powered between 300 and 600 Joules was used as the sound source and was towed 20-meters from the stern of the R/V Solstice. A CodaOctopus F180 series DGPS (https://d1io3yog0oux5.cloudfront.net/_461e02a784378e44c92c30a2133e395b/codacodaoct/db/443/2974/brochure/F180+Datasheet+v.2.0.8.20.pdf) provided positional information for the vessel. Shearwater Reveal (v. 2021, https://www.shearwatergeo.com/4/reveal-software) software was used to process the data as described in the processing steps below.

Cross_Reference:

Citation_Information:

Originator: Peter Dartnell
Originator: Daniel S. Brothers
Originator: Haeussler
Publication_Date: 2022
Title:

Multibeam bathymetry data collected in 2015 near Cross Sound, southeast Alaska, during field activity 2015-629-FA

Other_Citation_Details:

Dartnell, P., Brothers, D.S., and Haeussler, P.J., 2022, Multibeam bathymetry and acoustic-backscatter data collected in 2015 near Cross Sound, southeast Alaska, during field activity 2015-629-FA: U.S. Geological Survey data release, https://doi.org/10.5066/F7JH3KG6.

Online_Linkage: https://doi.org/10.5066/F7JH3KG6

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Quality control was conducted during acquisition. Some seismic profiles have gaps in them due to system crashes, or intentional shutdowns as required under terms of our operating permit to protect marine mammals. Seismic lines 97 and 98 recorded erratic electrical spikes.

Logical_Consistency_Report:

Quality control was conducted during acquisition and processing to ensure consistency of SEG-Y header navigation and seismic-reflection data that matches bathymetry along the tracklines.

Completeness_Report:

Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. Data release will be updated with additional SEG-Y profiles as data are processed.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

The CodaOctopus F180 DGPS has a stated +/- 30cm positional accuracy (https://d1io3yog0oux5.cloudfront.net/_461e02a784378e44c92c30a2133e395b/codacodaoct/db/443/2974/brochure/F180+Datasheet+v.2.0.8.20.pdf). Accuracies of final products may be lower due to total propagated uncertainties of the mapping systems, which include position and motion compensation system, navigation, as well as data processing that includes calculating the source layback from the stern of the vessel (20 meters), and calculation of offset distance between the sparker source and position of the receive hydrophone groups.

Lineage:

Process_Step:

Process_Description:

Raw SEG-D format seismic shots were imported into Shearwater Reveal seismic software for processing. Navigation data were converted to UTM zone 8N, offset geometry was calculated, and common midpoint (CMP) were binned at 1.5625 meter intervals. The following processing steps were applied: 80-120-800-900 Hz bandpass filter, despike, top mute, velocity semblance analysis, pre-stack predictive deconvolution, zero-phasing filter, normal moveout, trim statics, median gather filter, stack, bottom mute, phase shift time migration at 1400m/s, post migration spiking deconvolution, 200-ms automatic gain control. Processed data were exported to SEG-Y format with standard header byte locations. CMP X and Y navigation are written to header bytes 181/185 and 81/85 in UTM zone 8N coordinates with a -10000 scalar applied. SEG-Y data files were compressed into the zip file 2015-629-FA.mcs.segy.zip. Individual SEG-Y files are named with the prefix 2015-629-FA (the field activity identifier) and followed by the seismic line name suffix.

Process_Date: 20230227

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Point
Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 9

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: WGS 1984 UTM Zone 8N
Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -135.0
Latitude_of_Projection_Origin: 0.0
False_Easting: 500000.0
False_Northing: 0.0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:

Abscissa_Resolution: 0.0001
Ordinate_Resolution: 0.0001

Planar_Distance_Units: Meter

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview:

Zip archive of seismic traces with Time Stamp in standard SEG-Y file format

Entity_and_Attribute_Detail_Citation:

Society of Exploration Geophysicists (SEG) Technical Standards, available for download at http://seg.org/Publications/SEG-Technical-Standards

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey - CMGDS

Contact_Address:

Address_Type: mailing and physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060

Contact_Voice_Telephone: 831-427-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov

Resource_Description:

SEG-Y data are available in the zip file 2015-629-FA.mcs.segy.zip that contains nine standard SEG-Y format files of seismic traces with time stamp (Society of Exploration Geophysicists (SEG) Technical Standards, available for download at http://seg.org/Publications/SEG-Technical-Standards).-

Distribution_Liability:

Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: SEG-Y
Format_Version_Number: SEG-Y rev 1
Format_Information_Content:

Zip file contains the processed seismic data per navigation line.

File_Decompression_Technique:

The zip file can be decompressed with any zip utility (for example, 7zip, Keka, WinZip).

Transfer_Size: 169.5

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://doi.org/10.5066/P97Q990F

Access_Instructions:

Data and metadata can be downloaded using the Network_Resource_Name link and scrolling to the seismic data section.

Fees: None.

Technical_Prerequisites:

Use of SEG-Y data requires specialized software, such as ProMax and Seisworks by Landmark Geophysical; FOCUS and SeisX by Paradigm Geophysical; SPW by Parallel Geoscience; VISTA by Seismic Image Software; SeiSee by Dalmorneftegeophysica (DMNG); amongst others.

Metadata_Reference_Information:

Metadata_Date: 20230314
Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

U.S. Geological Survey, Pacific Coastal and Marine Science Center

Contact_Person: PCMSC Science Data Coordinator

Contact_Address:

Address_Type: mailing and physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060

Contact_Voice_Telephone: 831-427-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov

Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/CMGDS_DR_tool/DR_P97Q990F/2015-629-FA.mcs.metadata.html>