Metadata: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.45 Range_Domain_Maximum: 21.3 Attribute_Units_of_Measure: km (kilometers) Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: Sk1 2018 EQ thickness (mm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.0 Range_Domain_Maximum: 17.0 Attribute_Units_of_Measure: mm (millimeters) Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: Sk2 2016 EQ thickness (mm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.0 Range_Domain_Maximum: 26.0 Attribute_Units_of_Measure: mm (millimeters) Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: Sk3 2009 FL thickness (mm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3.5 Range_Domain_Maximum: 14 Attribute_Units_of_Measure: mm (millimeters) Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: Sk4 1995 FL thickness (mm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3.0 Range_Domain_Maximum: 10.0 Attribute_Units_of_Measure: mm (millimeters) Attribute_Measurement_Resolution: 0.01 Attribute: Attribute_Label: Sk4 1997 FL thickness (mm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.32 Range_Domain_Maximum: 14.0 Attribute_Units_of_Measure: mm (millimeters) Attribute_Measurement_Resolution: 0.01 Attribute: Attribute_Label: Sk5 1964 EQ thickness (mm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 12.0 Range_Domain_Maximum: 790.0 Attribute_Units_of_Measure: mm (millimeters) Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: Sk6 1954 EQ thickness (mm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 18.0 Range_Domain_Maximum: 61.5 Attribute_Units_of_Measure: mm (millimeters) Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: Thickness error (mm) Attribute_Definition: 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). Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.1 Range_Domain_Maximum: 0.1 Attribute_Units_of_Measure: mm (millimeters) Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: 2018/1964 Ratio Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0063 Range_Domain_Maximum: 0.2308 Attribute_Measurement_Resolution: 0.001 Attribute: Attribute_Label: 2016/1964 Ratio Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0065 Range_Domain_Maximum: 0.2068 Attribute_Measurement_Resolution: 0.001 Attribute: Attribute_Label: Sk1 Basal D80 (microm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 8.373 Range_Domain_Maximum: 176.77 Attribute_Units_of_Measure: micrometers Attribute_Measurement_Resolution: 0.001 Attribute: Attribute_Label: Sk1 Basal sorting (microm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.8639 Range_Domain_Maximum: 3.1745 Attribute_Units_of_Measure: micrometers Attribute_Measurement_Resolution: 0.0001 Attribute: Attribute_Label: Sk2 Basal D80 (microm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 9.618 Range_Domain_Maximum: 307.786 Attribute_Units_of_Measure: micrometers Attribute_Measurement_Resolution: 0.001 Attribute: Attribute_Label: Sk2 Basal sorting (microm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.644 Range_Domain_Maximum: 5.9833 Attribute_Units_of_Measure: micrometers Attribute_Measurement_Resolution: 0.0001 Attribute: Attribute_Label: Sk3 Basal D80 (microm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 6.8012 Range_Domain_Maximum: 14.57 Attribute_Units_of_Measure: micrometers Attribute_Measurement_Resolution: 0.0001 Attribute: Attribute_Label: Sk3 Basal sorting (microm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2.048 Range_Domain_Maximum: 2.3337 Attribute_Units_of_Measure: micrometers Attribute_Measurement_Resolution: 0.0001 Attribute: Attribute_Label: Sk5 Basal D80 (microm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 38.4733 Range_Domain_Maximum: 466.5165 Attribute_Units_of_Measure: micrometers Attribute_Measurement_Resolution: 0.0001 Attribute: Attribute_Label: Sk5 Basal sorting (microm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.4532 Range_Domain_Maximum: 15.6086 Attribute_Units_of_Measure: micrometers Attribute_Measurement_Resolution: 0.0001 Attribute: Attribute_Label: Sk6 Basal D80 (microm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 8.3732 Range_Domain_Maximum: 189.4646 Attribute_Units_of_Measure: micrometers Attribute_Measurement_Resolution: 0.0001 Attribute: Attribute_Label: Sk6 Basal sorting (microm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2.3190 Range_Domain_Maximum: 10.0257 Attribute_Units_of_Measure: micrometers Attribute_Measurement_Resolution: 0.0001 Attribute: Attribute_Label: Tu1 2016 EQ thickness (mm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 5.1 Range_Domain_Maximum: 91.6 Attribute_Units_of_Measure: mm (millimeters) Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: Tu2 1995 FL thickness (mm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3.6 Range_Domain_Maximum: 14.1 Attribute_Units_of_Measure: mm (millimeters) Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: Tu3 1964 EQ thickness (mm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 20.1 Range_Domain_Maximum: 538.4 Attribute_Units_of_Measure: mm (millimeters) Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: Tu1 Basal D80 (microm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 38.4733 Range_Domain_Maximum: 38.4733 Attribute_Units_of_Measure: micrometers Attribute_Measurement_Resolution: 0.0001 Attribute: Attribute_Label: Tu1 Basal sorting (microm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3.4024 Range_Domain_Maximum: 3.4024 Attribute_Units_of_Measure: micrometers Attribute_Measurement_Resolution: 0.0001 Attribute: Attribute_Label: PC1 (HF0) 2018 EQ thickness (mm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3 Range_Domain_Maximum: 23 Attribute_Units_of_Measure: mm (millimeters) Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: PC1 Basal D80 (microm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 535.8867 Range_Domain_Maximum: 535.8867 Attribute_Units_of_Measure: micrometers Attribute_Measurement_Resolution: 0.0001 Attribute: Attribute_Label: PC1 Basal sorting (microm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.9196 Range_Domain_Maximum: 1.9196 Attribute_Units_of_Measure: micrometers Attribute_Measurement_Resolution: 0.0001 Attribute: Attribute_Label: Ch1 2018 EQ thickness (mm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.4 Range_Domain_Maximum: 159.0 Attribute_Units_of_Measure: mm (millimeters) Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: Ch2 1991 EQ thickness (mm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.6 Range_Domain_Maximum: 144.3 Attribute_Units_of_Measure: mm (millimeters) Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: Ch3 1964 EQ thickness (mm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.7 Range_Domain_Maximum: 117.3 Attribute_Units_of_Measure: mm (millimeters) Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: Ch7 ~1890s FL thickness (mm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3.4 Range_Domain_Maximum: 18.5 Attribute_Units_of_Measure: mm (millimeters) Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: Ch1 Basal D80 (microm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 50.765 Range_Domain_Maximum: 50.765 Attribute_Units_of_Measure: micrometers Attribute_Measurement_Resolution: 0.001 Attribute: Attribute_Label: Ch1 Basal sorting (microm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 7.6582 Range_Domain_Maximum: 7.6582 Attribute_Units_of_Measure: micrometers Attribute_Measurement_Resolution: 0.0001 Attribute: Attribute_Label: Ch7 Basal D80 (microm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 15.625 Range_Domain_Maximum: 15.625 Attribute_Units_of_Measure: micrometers Attribute_Measurement_Resolution: 0.001 Attribute: Attribute_Label: Ch7 Basal sorting (microm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 4.2087 Range_Domain_Maximum: 4.2087 Attribute_Units_of_Measure: micrometers Attribute_Measurement_Resolution: 0.0001 Attribute: Attribute_Label: Ke1 1964 EQ thickness (mm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 12.5 Range_Domain_Maximum: 346.0 Attribute_Units_of_Measure: mm (millimeters) Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: Cumulative Turbidite Thickness (mm) Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 137.6 Range_Domain_Maximum: 6049.5 Attribute_Units_of_Measure: mm (millimeters) Attribute_Measurement_Resolution: 0.1 Overview_Description: 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 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: 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. 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: comma-delimited text Format_Version_Date: 2016 Format_Information_Content: Comma-delimited text file of event deposit characteristics and grain size data. Transfer_Size: 0.019 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.5066/P924775B Access_Instructions: Data can be downloaded using the Network_Resource_Name link and scrolling to the Environmental Data section. Fees: None. Technical_Prerequisites: Event deposit characteristics and grain size data are in .csv format can be viewed with any standard table editing software (for example, Excel, Numbers). Metadata_Reference_Information: Metadata_Date: 20231014 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