Collected bathymetric data, seismic data, and sediment cores from Lake Ozette in 2019, a USGS-US National Park Service partnership
These surveys are part of the USGS project, “Cascadia Subduction Zone Marine Geohazards.”
Objectives
Conduct surveys to reconstruct the timing of large earthquakes in northern Cascadia from earthquake-triggered landslide deposits in Lake Ozette, WA
Participants
USGS scientists Danny Brothers (Principal Investigator), Andy Ritchie, Pete Dal Ferro, Dan Powers, and Jackson Currie
Partners
U.S. National Park Service, USGS Earthquake Science Center scientist Brian Sherrod
Platforms Used
San Lorenzo, R/V Hadai
Data Collected
Swath bathymetry, chirp sub-bottom, boomer seismic-reflection, and vibracores
Highlights
- Combined with new subaerial LiDAR data, topo-bathymetry data of the entire Ozette lake basin is resolved to ~2 m resolution
- Bathymetry highlight areas of blocky, rugged, lake floor that appear to be covered in mass transport deposits (MTDs)
- Coring and sub-bottom imagery reveal a series of Holocene stacked discrete graded sandy beds that may record shaking during large earthquakes
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Collected bathymetric data, seismic data, and sediment cores from Lake Ozette in 2019, a USGS-US National Park Service partnership
These surveys are part of the USGS project, “Cascadia Subduction Zone Marine Geohazards.”
Objectives
Conduct surveys to reconstruct the timing of large earthquakes in northern Cascadia from earthquake-triggered landslide deposits in Lake Ozette, WA
Participants
USGS scientists Danny Brothers (Principal Investigator), Andy Ritchie, Pete Dal Ferro, Dan Powers, and Jackson Currie
Partners
U.S. National Park Service, USGS Earthquake Science Center scientist Brian Sherrod
Platforms Used
San Lorenzo, R/V Hadai
Data Collected
Swath bathymetry, chirp sub-bottom, boomer seismic-reflection, and vibracores
Highlights
- Combined with new subaerial LiDAR data, topo-bathymetry data of the entire Ozette lake basin is resolved to ~2 m resolution
- Bathymetry highlight areas of blocky, rugged, lake floor that appear to be covered in mass transport deposits (MTDs)
- Coring and sub-bottom imagery reveal a series of Holocene stacked discrete graded sandy beds that may record shaking during large earthquakes
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~