Geophysical and core sample data collected in lakes and fjords of southcentral Alaska following the 2018 Anchorage earthquake (ver. 2.0, October 2023)
By Drake M. Singleton, Daniel S. Brothers, Jenna C. Hill, Robert C. Witter, and Peter J. Haeussler
https://doi.org/10.5066/P924775B
Dates
Published: July 6, 2023
Last Revised: Oct. 14, 2023 (ver. 2)
Summary
This dataset includes sub-bottom seismic and sediment core data collected during USGS field activities 2021-612-FA, 2020-625-FA, and 2020-615-FA. Sub-bottom data include Chirp seismic in SEG-Y format with associated navigation tracklines. Core data include photo and computed tomography (CT) scans, and various mineralogical, radiometric, and other sampling data. Users are advised to read the metadata documents thoroughly for information on each data type provided. These data were collected from several lakes and fjords following the M7.1 2018 Anchorage earthquake by the USGS to gain a better understanding of the conditions that produce seismically triggered deposits in subaqueous basins. 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.
Environmental Data
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Cesium-137 concentration data of percussion driven gravity cores collected in Alaskan lakes and fjords following the 2018 Anchorage earthquake
This dataset includes Cesium-137 concentration data 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.
Data Files
2021-612_2020-625_2020-615_CS137.csv - 935 bytes
Metadata Files
2021-612_2020-625_2020-615_Cs137_metadata_052223.05-22-2023.xml - 14.5 KB
2021-612_2020-625_2020-615_Cs137_metadata_052223.05-22-2023.txt - 14.1 KB
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Event deposit characteristics from percussion driven gravity cores collected in Alaskan lakes and fjords following the 2018 Anchorage earthquake
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.
Data Files
2021-612_2020-625_2020-615_Event_Deposit_Characteristics.csv - 19.5 KB
Metadata Files
2021-612_2020-625_2020-615_Event_Deposit_Characteristics_metadata.xml - 38.4 KB
2021-612_2020-625_2020-615_Event_Deposit_Characteristics_metadata.txt - 38.1 KB
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Grain-size data of percussion driven gravity cores collected in Alaskan lakes and fjords following the 2018 Anchorage earthquake
This dataset includes grain-size data 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.
Data Files
2021-612_2020-625_2020-615_grainsize.csv - 42.7 KB
Metadata Files
2021-612_2020-625_2020-615_grainsize_metadata_052223.05-22-2023.xml - 44.9 KB
2021-612_2020-625_2020-615_grainsize_metadata_052223.05-22-2023.txt - 44.0 KB
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Multi-sensor core logger (MSCL) data of percussion driven gravity cores collected in Alaskan lakes and fjords following the 2018 Anchorage earthquake
This dataset includes multi-sensor core logger (MSCL) data 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.
Data Files
2021-612_2020-625_2020-615_MSCL.csv - 217.7 KB
Metadata Files
2021-612_2020-625_2020-615_MSCL_metadata_052223.05-22-2023.xml - 15.9 KB
2021-612_2020-625_2020-615_MSCL_metadata_052223.05-22-2023.txt - 15.5 KB
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Summary of event deposit characteristics from percussion driven gravity cores collected in Alaskan lakes and fjords following the 2018 Anchorage earthquake
This dataset includes qualitative interpretations of event deposits 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.
Data Files
2021-612_2020-625_2020-615_Event_Deposit_Summary.csv - 1.5 KB
Metadata Files
2021-612_2020-625_2020-615_Event_Deposit_Summary_metadata.xml - 17.5 KB
2021-612_2020-625_2020-615_Event_Deposit_Summary_metadata.txt - 17.1 KB
Imagery Data
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Computed tomography (CT) scans of percussion driven gravity cores collected in Alaskan lakes and fjords following the 2018 Anchorage earthquake
This dataset includes computed tomography (CT) scans of 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.
Data Files
2021-612_2020-625_2020-615_core_CT_Images.zip - 283.6 MB
Metadata Files
2021-612_2020-625_2020-615_core_CT_Images_metadata_052223.05-22-2023.xml - 13.8 KB
2021-612_2020-625_2020-615_core_CT_Images_metadata_052223.05-22-2023.txt - 13.4 KB
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Photographs of percussion driven gravity cores collected in Alaskan lakes and fjords following the 2018 Anchorage earthquake
This dataset includes photographs of 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.
Data Files
2021-612_2020-625_2020-615_core_photos.zip - 588.0 MB
Metadata Files
2021-612_2020-625_2020-615_core_photos_metadata_052223.05-22-2023.xml - 12.7 KB
2021-612_2020-625_2020-615_core_photos_metadata_052223.05-22-2023.txt - 12.3 KB
Location-Elevation Data
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Coordinates of percussion driven gravity cores collected in Alaskan lakes and fjords following the 2018 Anchorage earthquake
This dataset includes coordinate information for 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.
Data Files
2021_612_2020_625_2020_615_core_nav.zip - 7.9 KB
Metadata Files
2021-612_2020-625_2020-615_core_nav_metadata_052223.05-22-2023.xml - 14.8 KB
2021-612_2020-625_2020-615_core_nav_metadata_052223.05-22-2023.txt - 14.5 KB
Seismic Data
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Chirp seismic-reflection and navigation data collected in Alaskan lakes and fjords following the 2018 Anchorage earthquake
Chirp seismic-reflection data and associated navigation files were collected from lacustrine and fjord basins in southcentral Alaska following the 2018 Anchorage earthquake. These data were collected from a 25-foot Boston Whaler (R/V Moose Dancer),18-foot cataraft (R/V Enterprise), and the R/V Alaskan Gyre in the summers of 2020 and 2021 for use in regional hazard assessments relating to Alaska’s seismic hazards.
Data Files
2021-612_2020-625_2020-615_chirp_nav.zip - 374.1 KB
2021-612_2020-625_2020-615_chirp.zip - 4.3 GB
Metadata Files
2021-612_2020-625_2020-615_seismic_metadata_052223.06-13-2023.xml - 17.8 KB
2021-612_2020-625_2020-615_seismic_metadata_052223.06-13-2023.txt - 17.4 KB
Supplemental Files
- VersionHistory_P924775B.txt - 1.2 KB
Suggested Citation
Singleton, D.M., Brothers, D.S., Hill, J.C., Haeussler, P.J., and Witter, R.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): U.S. Geological Survey data release, https://doi.org/10.5066/P924775B.
Revision History
First release: 2023
Revised: October 2023 (ver. 2)
Changes in Version 2
Two csv tables added containing information describing sediment deposit characteristics associated with recent historical earthquakes in south-central Alaska