Event deposit characteristics from percussion driven gravity cores collected in Alaskan lakes and fjords following the 2018 Anchorage earthquake

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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: Drake M. Singleton
Originator: Daniel S. Brothers
Originator: Jenna C. Hill
Originator: Peter J. Haeussler
Originator: Robert C. Witter
Publication_Date: 20231014
Title:

Event deposit characteristics from percussion driven gravity cores collected in Alaskan lakes and fjords following the 2018 Anchorage earthquake

Geospatial_Data_Presentation_Form: comma-delimited text
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P924775B

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/P924775B
Larger_Work_Citation:

Citation_Information:

Originator: Drake M. Singleton
Originator: Daniel S. Brothers
Originator: Jenna C. Hill
Originator: Peter J. Haeussler
Originator: Robert C. Witter
Publication_Date: 2023
Title:

Geophysical and core sample data collected in lakes and fjords of southcentral Alaska following the 2018 Anchorage earthquake (ver. 2.0, October 2023)

Edition: 2.0
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P924775B

Publication_Information:

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

Other_Citation_Details:

Suggested Citation: Singleton, D.M., Brothers, D.S., Hill, J.C., Haeussler, P.J., and Witter, R.C., 2023, Coordinates of percussion driven gravity cores collected in Alaskan lakes and fjords following the 2018 Anchorage earthquake (ver. 2.0, October 2023): U.S. Geological Survey data release, https://doi.org/10.5066/P924775B.

Online_Linkage: https://doi.org/10.5066/P924775B

Description:

Abstract:

This dataset includes deposit thickness and grain size measurements from sediment cores collected from lacustrine and fjord basins in southcentral Alaska following the 2018 Anchorage earthquake. The cores were collected with a percussion driven gravity corer for use in regional hazard assessments relating to Alaska’s seismic hazard.

Purpose:

Identification of fault-related submarine hazards is a primary mission of the USGS Coastal and Marine Hazards and Resources Program. Intraslab earthquakes, which occur at depth within the subducting plate, can cause intense shaking at the Earth’s surface, but do not cause surficial faulting or result in significant land level changes. The seismic shaking associated with intraslab earthquakes can remobilize subaqueous sediment and lead to gravity driven sediment flows, potentially creating a record of past shaking from these events. To gain a better understanding of the conditions that produce seismically triggered deposits in subaqueous basins the USGS collected Chirp seismic and sediment cores from several lakes and fjords following the M7.1 2018 Anchorage earthquake. These data are intended to further our understand of geologic hazard in southcentral Alaska, improve risk assessments for local communities and critical infrastructure, and to provide data for future research on regional paleoseismic records in southcentral Alaska.

Supplemental_Information:

Additional information about the field activities from which these data were derived is available online at:
https://cmgds.marine.usgs.gov/fan_info.php?fan=2021-612-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2020-615-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2020-625-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: 20200808
Ending_Date: 20210622

Currentness_Reference: Ground conditions at time data were collected

Status:

Progress: In work
Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -151.490850
East_Bounding_Coordinate: -148.537050
North_Bounding_Coordinate: 62.520180
South_Bounding_Coordinate: 60.071108

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:7dfad99c-741f-4dc5-b5d1-e25582ba719a

Theme:

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

Theme:

Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: substrate

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: core analysis

Theme:

Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: sediment

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

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Pacific Ocean
Place_Keyword: Prince William Sound
Place_Keyword: Passage Canal
Place_Keyword: State of Alaska
Place_Keyword: Skilak Lake
Place_Keyword: Kenai Lake
Place_Keyword: Tustumena Lake
Place_Keyword: Chelatna Lake

Place:

Place_Keyword_Thesaurus: None
Place_Keyword: Harriman Fjord

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.

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

Native_Data_Set_Environment: Microsoft Excel (v 16.6)
Cross_Reference:

Citation_Information:

Originator: Caroline A. Schneider
Originator: Wayne S. Rasband
Originator: Kevin W. Eliceiri.
Publication_Date: 2012
Title: NIH Image to ImageJ: 25 years of image analysis.
Other_Citation_Details:

Schneider, Caroline A., Rasband, Wayne S., and Eliceiri, Kevin W. "NIH Image to ImageJ: 25 years of image analysis." Nature methods 9.7 (2012): 671-675.

Online_Linkage: https://doi.org/10.1038/nmeth.2089

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Quality control of attribute accuracy was conducted during field data collection and processing workflows.

Logical_Consistency_Report:

Data received review from USGS scientists collecting and processing the data at the end of each workday.

Completeness_Report:

Dataset will be updated as cores are processed through the Sediment Core Lab at the Pacific Coastal and Marine Science Center. Users are advised to read the rest of the metadata record carefully for additional details.

Lineage:

Process_Step:

Process_Description:

Cores were collected using a UWITEC percussion driven hammer core during U.S. Geological Survey cruises 2021-612-FA, 2020-615-FA, 2020-625-FA. The cores were transported back to the USGS Pacific Coastal and Marine Science Center core lab for subsequent analyses.

Process_Date: 20210622

Process_Step:

Process_Description:

Event deposits, defined here as deposits with anomalous character relative to background sediments (and interpreted as turbidites), are identified based mainly on thickness (> ~1 cm) and grain size (coarser), and were sampled for grain-size analysis at 3-mm intervals. Event deposit thicknesses were measured in CT images with the ImageJ software package (Schneider et al., 2012), and for deposits with angular contacts, thicknesses were measured perpendicular to the contact. Errors in turbidite thickness are assigned the CT-scan resolution rounded up to the nearest tenth of a millimeter (i.e., 0.1 mm).

Process_Date: 20211030

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: 81

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: WGS 1984
Ellipsoid_Name: WGS 84
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257224

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: 2021-612_2020-625_2020-615_Event_Deposit_Characteristics.csv
Entity_Type_Definition:

Comma-delimited text file containing event deposit thickness and grain size data from core samples.

Entity_Type_Definition_Source: producer defined

Attribute:

Attribute_Label: Core ID
Attribute_Definition:

Location name, year collected, and core ID (for example, SK20-01A is Skilak Lake 2020 core 01A)

Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Unrepresentable_Domain: Unique identifier for the sample used given in the field

Attribute:

Attribute_Label: Distance to delta (km)
Attribute_Definition:

Distance between core location and primary fluvial source. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values.