Chirp seismic-reflection data of field activity 2015-651-FA; Chatham Strait and Cross Sound, southeastern Alaska from 2015-08-03 to 2015-08-21

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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: James E. Conrad
Originator: Jared W. Kluesner
Originator: Patrick E. Hart
Originator: Peter J. Haeussler
Publication_Date: 2017
Title:

Chirp seismic-reflection data of field activity 2015-651-FA; Chatham Strait and Cross Sound, southeastern Alaska from 2015-08-03 to 2015-08-21

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

Series_Name: data release
Issue_Identification: DOI:10.5066/F7RX9B1R

Publication_Information:

Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, CA
Publisher: U.S. Geological Survey

Online_Linkage: https://doi.org/10.5066/F7RX9B1R
Online_Linkage:

https://www.sciencebase.gov/catalog/item/59e7d913e4b05fe04cd3a45a?name=2015-651-FA_chirp.zip

Larger_Work_Citation:

Citation_Information:

Multichannel minisparker and chirp seismic-reflection data of field activity 2015-651-FA; Chatham Strait and Cross Sound, southeastern Alaska from 2015-08-03 to 2015-08-21

Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/F7RX9B1R

Publication_Information:

Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, CA
Publisher: U.S. Geological Survey

Online_Linkage: https://doi.org/10.5066/F7RX9B1R

Description:

Abstract:

This data release contains high-resolution seismic reflection data collected in August of 2015 to explore marine geologic hazards of inland waterways of southeastern Alaska. Sub-bottom profiles were acquired in the inland waters between Glacier Bay and Juneau, including Cross Sound and Chatham Strait. High-resolution seismic-reflection profiles were acquired to assess evidence for active seabed faulting and submarine landslide hazards. The data were collected aboard the US Geological Survey R/V Alaskan Gyre. The seismic-reflection data were acquired using a tow-fish Edgetech 512 chirp subbottom profiler. Subbottom acoustic penetration spans up to several tens of meters, and is variable by location. This data release contains processed digital SEG-Y. This data release will be updated as subsequent lines of data from this field activity are published.

Purpose:

The U.S. Geological Survey (USGS) collected high-resolution chirp seismic-reflection data in August of 2015, in the inland waterways between Glacier bay and Juneau including Chatham Strait and Cross Sound, in southeastern Alaska. The survey was designed to identify the spatial distribution of active faults, assess the regional evidence for active seabed faulting, and identify submarine landslide hazards. These data can be used to better image and understand the deformation history and earthquake/tsunami hazards of the Queen Charlotte-Fairweather fault system, a major plate boundary strike-slip fault system that accommodates more than ninety percent of the relative motion between the Pacific and North American plates. In addition, the survey images submarine landslides in these inland waterways of southeastern Alaska in order to determine causes and age of seafloor failure. This work was funded by the USGS Coastal and Marine Geology Program’s Marine Geohazards Project and the Alaska Department of Fish and Game (ADFG). The high-resolution seismic-reflection profiles of bedrock, sediment deposits and tectonic structure provide geologic information that is essential to hazard assessment, regional sediment management and coastal and marine spatial planning at Federal, State and local levels, as well as to future research on the geomorphic, sedimentary, tectonic and climatic record of southeastern Alaska.

Supplemental_Information:

Additional information about the field activity from which these data were derived is available online at: http://cmgds.marine.usgs.gov/fan_info.php?fan=2015-651-FA Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20150803
Ending_Date: 20150821

Currentness_Reference: ground condition at the time the data were collected

Status:

Progress: In work
Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -153.457
East_Bounding_Coordinate: -133.404
North_Bounding_Coordinate: 58.4340
South_Bounding_Coordinate: 52.2441

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:59e7d913e4b05fe04cd3a45a

Theme:

Theme_Keyword_Thesaurus: Global Change Master Directory (GCMD)
Theme_Keyword: Bathymetry
Theme_Keyword: Continental Margins

Theme:

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

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: sub-bottom profiling

Theme:

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

Theme:

Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: Bathymetry and Elevation

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: chirp
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: CMG
Theme_Keyword: CMGP
Theme_Keyword: Pacific Coastal and Marine Science Center
Theme_Keyword: PCMSC

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Pacific Ocean
Place_Keyword: State of Alaska
Place_Keyword: Juneau
Place_Keyword: Glacier Bay
Place_Keyword: Cross Sound
Place_Keyword: Chatham Strait
Place_Keyword: Lynn Canal

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(s) of the dataset and in products derived from these data. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. This information is not intended for navigational 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:

https://www.sciencebase.gov/catalog/file/get/59e7d913e4b05fe04cd3a45a?name=2015-651-FA_chirp_index_map.jpg&allowOpen=true

Browse_Graphic_File_Description: index map
Browse_Graphic_File_Type: JPEG

Native_Data_Set_Environment: SEG-Y Rev 1

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report: Identified as best available version.

Logical_Consistency_Report:

Subbottom data were collected during USGS cruise 2015-651-FA using a tow-fish Edgetech 512 chirp subbottom profiler. Quality control was conducted during the collection process.

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.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Position data were provided by a Differential Global Positioning System (DGPS) navigation receiver.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Depths shown in the seismic data files are in milliseconds (round trip travel time) and are referenced to sea level.

Lineage:

Process_Step:

Process_Description:

Seismic-reflection data were collected using a tow-fish Edgetech 512 chirp subbottom profiler consisting of a source transducer and an array of receiving hydrophones housed in a 500-lb “fish” towed at a depth of several meters below the sea surface. The swept-frequency “chirp” source signal is approximately 500 – 4,500 Hz, and data are recorded by hydrophones located on the bottom of the fish. The data consist of three-channels: a raw channel, a 90-degree phase-shifted channel, and an “amplitude envelop” channel created and transformed internally from the other two channels. The data were recorded in standard SEG-Y

Process_Date: 2015

Process_Step:

Process_Description:

Corrected author's middle initial from James R. Conrad to James E. Conrad in both the Citation and Larger Work Citation. No data were changed.

Process_Date: 20200831
Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Susan A Cochran
Contact_Organization:

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

Contact_Address:

Address_Type: mailing and physical
Address: 2885 Mission St.
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060
Country: United States

Contact_Voice_Telephone: 831-460-7545
Contact_Electronic_Mail_Address: scochran@usgs.gov

Process_Step:

Process_Description:

Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed.

Process_Date: 20201019
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross

Contact_Position: Marine Geologist
Contact_Address:

Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598

Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov

Process_Step:

Process_Description:

Performed minor edits to the metadata to correct typos. No data were changed

Process_Date: 20211013
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: Susan A. Cochran

Contact_Position: Geologist
Contact_Address:

Address_Type: Mailing and Physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060

Contact_Voice_Telephone: 831-460-7545
Contact_Electronic_Mail_Address: scochran@usgs.gov

Spatial_Data_Organization_Information:

Indirect_Spatial_Reference:

Horizontal X and Y locations for the seismic profile locations are provided in ASCII position files and are stored in the SEG-Y data trace headers in the standard header locations.

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.00001
Longitude_Resolution: 0.00001
Geographic_Coordinate_Units: Decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: D_WGS_84
Ellipsoid_Name: WGS_84
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257223563

Vertical_Coordinate_System_Definition:

Depth_System_Definition:

Depth_Datum_Name: Local surface
Depth_Resolution: 0.1
Depth_Distance_Units: meters
Depth_Encoding_Method: Attribute values

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview:

Navigation and Seismic Shots 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 - ScienceBase

Contact_Address:

Address_Type: mailing and physical
Address: Denver Federal Center, Building 810, Mail Stop 302
City: Denver
State_or_Province: CO
Postal_Code: 80225

Contact_Voice_Telephone: 1-888-275-8747
Contact_Electronic_Mail_Address: sciencebase@usgs.gov

Resource_Description:

2015-651-FA_chirp.zip – zip file containing high-resolution seismic-reflection (SEG-Y) data collected during PCMSC field activity 2015-651-FA. The data are divided up and presented by navigation line, as reflected in the individual file name(s).

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 raw seismic data per navigation line
File_Decompression_Technique:

Winzip, 7-zip, or Winrar are free software that will open .zip files

Transfer_Size: 503

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://www.sciencebase.gov/catalog/file/get/59e7d913e4b05fe04cd3a45a?name=2015-651-FA_chirp.zip

Network_Resource_Name: https://doi.org/10.5066/F7RX9B1R

Fees: None

Metadata_Reference_Information:

Metadata_Date: 20211013
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/ScienceBase/DR_F7RX9B1R/2015-651-FA_chirp_metadata.html>