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

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Frequently anticipated questions:

What does this data set describe?

Title:
Event deposit characteristics from percussion driven gravity cores collected in Alaskan lakes and fjords following the 2018 Anchorage earthquake
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.
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.
  1. How might this data set be cited?
    Singleton, Drake M., Brothers, Daniel S., Hill, Jenna C., Haeussler, Peter J., and Witter, Robert C., 20231014, Event deposit characteristics from percussion driven gravity cores collected in Alaskan lakes and fjords following the 2018 Anchorage earthquake: data release DOI:10.5066/P924775B, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

    This is part of the following larger work.

    Singleton, Drake M., Brothers, Daniel S., Hill, Jenna C., Haeussler, Peter J., and Witter, Robert C., 2023, Geophysical and core sample data collected in lakes and fjords of southcentral Alaska following the 2018 Anchorage earthquake (ver. 2.0, October 2023): data release DOI:10.5066/P924775B, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, CA.

    Online Links:

    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.
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -151.490850
    East_Bounding_Coordinate: -148.537050
    North_Bounding_Coordinate: 62.520180
    South_Bounding_Coordinate: 60.071108
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 08-Aug-2020
    Ending_Date: 22-Jun-2021
    Currentness_Reference:
    Ground conditions at time data were collected
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: comma-delimited text
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Point data set. It contains the following vector data types (SDTS terminology):
      • Point (81)
    2. What coordinate system is used to represent geographic features?
      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.00001. Longitudes are given to the nearest 0.00001. Latitude and longitude values are specified in Decimal Degrees. The horizontal datum used is WGS 1984.
      The ellipsoid used is WGS 84.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.257224.
  7. How does the data set describe geographic features?
    2021-612_2020-625_2020-615_Event_Deposit_Characteristics.csv
    Comma-delimited text file containing event deposit thickness and grain size data from core samples. (Source: producer defined)
    Core ID
    Location name, year collected, and core ID (for example, SK20-01A is Skilak Lake 2020 core 01A) (Source: U.S. Geological Survey) Unique identifier for the sample used given in the field
    Distance to delta (km)
    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. (Source: producer defined)
    Range of values
    Minimum:0.45
    Maximum:21.3
    Units:km (kilometers)
    Resolution:0.1
    Sk1 2018 EQ thickness (mm)
    Measured thickness of the Sk1 event deposit. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:1.0
    Maximum:17.0
    Units:mm (millimeters)
    Resolution:0.1
    Sk2 2016 EQ thickness (mm)
    Measured thickness of the Sk2 event deposit. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:1.0
    Maximum:26.0
    Units:mm (millimeters)
    Resolution:0.1
    Sk3 2009 FL thickness (mm)
    Measured thickness of the Sk3 event deposit. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:3.5
    Maximum:14
    Units:mm (millimeters)
    Resolution:0.1
    Sk4 1995 FL thickness (mm)
    Measured thickness of the Sk4 1995 event deposit. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:3.0
    Maximum:10.0
    Units:mm (millimeters)
    Resolution:0.01
    Sk4 1997 FL thickness (mm)
    Measured thickness of the Sk4 1997 event deposit. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:1.32
    Maximum:14.0
    Units:mm (millimeters)
    Resolution:0.01
    Sk5 1964 EQ thickness (mm)
    Measured thickness of the Sk5 event deposit. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:12.0
    Maximum:790.0
    Units:mm (millimeters)
    Resolution:0.1
    Sk6 1954 EQ thickness (mm)
    Measured thickness of the Sk6 event deposit. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:18.0
    Maximum:61.5
    Units:mm (millimeters)
    Resolution:0.1
    Thickness error (mm)
    Error on the measured thickness of event deposit. Errors in event deposit thickness are assigned the CT-scan resolution rounded up to the nearest tenth of a millimeter (i.e., 0.1 mm). (Source: producer defined)
    Range of values
    Minimum:0.1
    Maximum:0.1
    Units:mm (millimeters)
    Resolution:0.1
    2018/1964 Ratio
    Ratio of Sk1 (2018) measured thickness relative to Sk5 (1964) measured thickness. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:0.0063
    Maximum:0.2308
    Resolution:0.001
    2016/1964 Ratio
    Ratio of Sk2 (2016) measured thickness relative to Sk5 (1964) measured thickness. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:0.0065
    Maximum:0.2068
    Resolution:0.001
    Sk1 Basal D80 (microm)
    The D80 value of the basal sample from event deposit Sk1. The D80 statistic is a measure of grain size fractionation and indicates the grain size diameter that 80-volume percent of the sample is smaller than. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:8.373
    Maximum:176.77
    Units:micrometers
    Resolution:0.001
    Sk1 Basal sorting (microm)
    The sorting value of the basal sample from event deposit Sk1. The sorting statistic is a measure of grain size range and the spread about the mean of the grain size population. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:1.8639
    Maximum:3.1745
    Units:micrometers
    Resolution:0.0001
    Sk2 Basal D80 (microm)
    The D80 value of the basal sample from event deposit Sk2. The D80 statistic is a measure of grain size fractionation and indicates the grain size diameter that 80-volume percent of the sample is smaller than. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:9.618
    Maximum:307.786
    Units:micrometers
    Resolution:0.001
    Sk2 Basal sorting (microm)
    The sorting value of the basal sample from event deposit Sk2. The sorting statistic is a measure of grain size range and the spread about the mean of the grain size population. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:1.644
    Maximum:5.9833
    Units:micrometers
    Resolution:0.0001
    Sk3 Basal D80 (microm)
    The D80 value of the basal sample from event deposit Sk3. The D80 statistic is a measure of grain size fractionation and indicates the grain size diameter that 80-volume percent of the sample is smaller than. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:6.8012
    Maximum:14.57
    Units:micrometers
    Resolution:0.0001
    Sk3 Basal sorting (microm)
    The sorting value of the basal sample from event deposit Sk3. The sorting statistic is a measure of grain size range and the spread about the mean of the grain size population. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:2.048
    Maximum:2.3337
    Units:micrometers
    Resolution:0.0001
    Sk5 Basal D80 (microm)
    The D80 value of the basal sample from event deposit Sk5. The D80 statistic is a measure of grain size fractionation and indicates the grain size diameter that 80-volume percent of the sample is smaller than. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:38.4733
    Maximum:466.5165
    Units:micrometers
    Resolution:0.0001
    Sk5 Basal sorting (microm)
    The sorting value of the basal sample from event deposit Sk5. The sorting statistic is a measure of grain size range and the spread about the mean of the grain size population. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:1.4532
    Maximum:15.6086
    Units:micrometers
    Resolution:0.0001
    Sk6 Basal D80 (microm)
    The D80 value of the basal sample from event deposit Sk6. The D80 statistic is a measure of grain size fractionation and indicates the grain size diameter that 80-volume percent of the sample is smaller than. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:8.3732
    Maximum:189.4646
    Units:micrometers
    Resolution:0.0001
    Sk6 Basal sorting (microm)
    The sorting value of the basal sample from event deposit Sk6. The sorting statistic is a measure of grain size range and the spread about the mean of the grain size population. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:2.3190
    Maximum:10.0257
    Units:micrometers
    Resolution:0.0001
    Tu1 2016 EQ thickness (mm)
    Measured thickness of the Tu1 event deposit. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:5.1
    Maximum:91.6
    Units:mm (millimeters)
    Resolution:0.1
    Tu2 1995 FL thickness (mm)
    Measured thickness of the Tu2 event deposit. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:3.6
    Maximum:14.1
    Units:mm (millimeters)
    Resolution:0.1
    Tu3 1964 EQ thickness (mm)
    Measured thickness of the Tu3 event deposit. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:20.1
    Maximum:538.4
    Units:mm (millimeters)
    Resolution:0.1
    Tu1 Basal D80 (microm)
    The D80 value of the basal sample from event deposit Tu1. The D80 statistic is a measure of grain size fractionation and indicates the grain size diameter that 80-volume percent of the sample is smaller than. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:38.4733
    Maximum:38.4733
    Units:micrometers
    Resolution:0.0001
    Tu1 Basal sorting (microm)
    The sorting value of the basal sample from event deposit Tu1. The sorting statistic is a measure of grain size range and the spread about the mean of the grain size population. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:3.4024
    Maximum:3.4024
    Units:micrometers
    Resolution:0.0001
    PC1 (HF0) 2018 EQ thickness (mm)
    Measured thickness of the PC1 (or HF0) event deposit. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:3
    Maximum:23
    Units:mm (millimeters)
    Resolution:1
    PC1 Basal D80 (microm)
    The D80 value of the basal sample from event deposit PC1. The D80 statistic is a measure of grain size fractionation and indicates the grain size diameter that 80-volume percent of the sample is smaller than. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:535.8867
    Maximum:535.8867
    Units:micrometers
    Resolution:0.0001
    PC1 Basal sorting (microm)
    The sorting value of the basal sample from event deposit PC1. The sorting statistic is a measure of grain size range and the spread about the mean of the grain size population. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:1.9196
    Maximum:1.9196
    Units:micrometers
    Resolution:0.0001
    Ch1 2018 EQ thickness (mm)
    Measured thickness of the Ch1 event deposit. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:1.4
    Maximum:159.0
    Units:mm (millimeters)
    Resolution:0.1
    Ch2 1991 EQ thickness (mm)
    Measured thickness of the Ch2 event deposit. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:1.6
    Maximum:144.3
    Units:mm (millimeters)
    Resolution:0.1
    Ch3 1964 EQ thickness (mm)
    Measured thickness of the Ch3 event deposit. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:1.7
    Maximum:117.3
    Units:mm (millimeters)
    Resolution:0.1
    Ch7 ~1890s FL thickness (mm)
    Measured thickness of the Ch7 event deposit. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:3.4
    Maximum:18.5
    Units:mm (millimeters)
    Resolution:0.1
    Ch1 Basal D80 (microm)
    The D80 value of the basal sample from event deposit Ch1. The D80 statistic is a measure of grain size fractionation and indicates the grain size diameter that 80-volume percent of the sample is smaller than. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:50.765
    Maximum:50.765
    Units:micrometers
    Resolution:0.001
    Ch1 Basal sorting (microm)
    The sorting value of the basal sample from event deposit Ch1. The sorting statistic is a measure of grain size range and the spread about the mean of the grain size population. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:7.6582
    Maximum:7.6582
    Units:micrometers
    Resolution:0.0001
    Ch7 Basal D80 (microm)
    The D80 value of the basal sample from event deposit Ch7. The D80 statistic is a measure of grain size fractionation and indicates the grain size diameter that 80-volume percent of the sample is smaller than. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:15.625
    Maximum:15.625
    Units:micrometers
    Resolution:0.001
    Ch7 Basal sorting (microm)
    The sorting value of the basal sample from event deposit Ch7. The sorting statistic is a measure of grain size range and the spread about the mean of the grain size population. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:4.2087
    Maximum:4.2087
    Units:micrometers
    Resolution:0.0001
    Ke1 1964 EQ thickness (mm)
    Measured thickness of the Ke1 event deposit. Fields marked -9999 represent either 'no data' areas based on insufficient observations or lack of reliable data, or blank cells/no values. (Source: producer defined)
    Range of values
    Minimum:12.5
    Maximum:346.0
    Units:mm (millimeters)
    Resolution:0.1
    Cumulative Turbidite Thickness (mm)
    Sum of event deposit thickness for each individual event deposit observed in more than ten cores. Values are reported in millimeters followed by the specific deposit name in parentheses. Fields marked NaN represent blank cell/no value. (Source: producer defined)
    Range of values
    Minimum:137.6
    Maximum:6049.5
    Units:mm (millimeters)
    Resolution:0.1
    Entity_and_Attribute_Overview:
    The first line of the csv file is a header line. Location information for each sediment core can be found in the 2021_612_2020_625_2020_615_core_nav shapefile included in this data release.
    Entity_and_Attribute_Detail_Citation: U.S. Geological Survey

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Drake M. Singleton
    • Daniel S. Brothers
    • Jenna C. Hill
    • Peter J. Haeussler
    • Robert C. Witter
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    U.S. Geological Survey, Pacific Coastal and Marine Science Center
    Attn: PCMSC Science Data Coordinator
    2885 Mission Street
    Santa Cruz, CA

    831-427-4747 (voice)
    pcmsc_data@usgs.gov

Why was the data set created?

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.

How was the data set created?

  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
    Date: 22-Jun-2021 (process 1 of 2)
    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.
    Date: 30-Oct-2021 (process 2 of 2)
    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).
  3. What similar or related data should the user be aware of?
    Schneider, Caroline A., Rasband, Wayne S., and Eliceiri., Kevin W., 2012, NIH Image to ImageJ: 25 years of image analysis..

    Online Links:

    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.

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
    Quality control of attribute accuracy was conducted during field data collection and processing workflows.
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    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.
  5. How consistent are the relationships among the observations, including topology?
    Data received review from USGS scientists collecting and processing the data at the end of each workday.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
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.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey - CMGDS
    2885 Mission Street
    Santa Cruz, CA

    831-427-4747 (voice)
    pcmsc_data@usgs.gov
  2. What's the catalog number I need to order this data set? Event deposit characteristics and grain size data are provided in a comma-delimited text file (2021-612_2020-625_2020-615_Event_Deposit_Characteristics.csv) accompanied by CSDGM FGDC-compliant metadata.
  3. What legal disclaimers am I supposed to read?
    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.
  4. How can I download or order the data?
    • Availability in digital form:
      Data format: Comma-delimited text file of event deposit characteristics and grain size data. in format comma-delimited text Size: 0.019
      Network links: https://doi.org/10.5066/P924775B
    • Cost to order the data: None.

  5. What hardware or software do I need in order to use the data set?
    Event deposit characteristics and grain size data are in .csv format can be viewed with any standard table editing software (for example, Excel, Numbers).

Who wrote the metadata?

Dates:
Last modified: 14-Oct-2023
Metadata author:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Attn: PCMSC Science Data Coordinator
2885 Mission Street
Santa Cruz, CA

831-427-4747 (voice)
pcmsc_data@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/CMGDS_DR_tool/DR_P924775B/2021-612_2020-625_2020-615_Event_Deposit_Characteristics_metadata.faq.html>
Generated by mp version 2.9.51 on Mon Oct 23 09:36:23 2023