Colored Shaded-Relief Bathymetry and Acoustic Backscatter of Lake Sammamish, Washington
Scientific Investigations Map
3537
Coastal and Marine Hazards and Resources Program
Links
- Sheets:
- Related Work: Data Report 1207 - Bathymetric and acoustic-backscatter mapping of Lake Sammamish, Washington, during USGS field activity 2021-656-FA
- Data Release: USGS data release - Bathymetry and acoustic-backscatter data for Lake Sammamish, Washington collected during USGS field activity 2021-656-FA
- Download citation as: RIS | Dublin Core
Abstract
Evidence of strong earthquakes (such as underwater landslides and associated deposits) may be recorded within the lacustrine sediments of Pacific Northwest lakes. The floor of Lake Sammamish, Wash., an approximately 11 kilometer (6.8 mile) long, 2 kilometer (1.2 mile) wide, and 35 meter (114.8 feet) deep lake located in a populated region just east of Seattle, was mapped by the U.S. Geological Survey in November of 2021 to search for evidence of past earthquakes. Mapping was conducted using a SWATHplus-M 234-kHz interferometric side-scan sonar system was pole-mounted on the U.S. Geological Survey research vessel Parke Snavely, and the system collected full-coverage bathymetric and acoustic backscatter data, which were processed to 2-meter spatial resolution. Two maps were created, a colored shaded-relief bathymetric map showing lake floor morphology (sheet 1), and an acoustic-backscatter map showing backscatter intensities (sheet 2). The results may then be utilized together to investigate past earthquake activity.
Suggested Citation
Dartnell, P., Brothers, D.S., Sherrod, B., Hatcher, G.A., Powers, D.C., Hill, J.C., Currie, J.E., and Dal Ferro, P., 2025, Colored shaded-relief bathymetry and acoustic backscatter of Lake Sammamish, Washington: U.S. Geological Survey Scientific Investigations Map 3537, 2 sheets, scale 1:14,000, https://doi.org/10.3133/sim3537.
ISSN: 2329-132X (online)
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Colored shaded-relief bathymetry and acoustic backscatter of Lake Sammamish, Washington |
| Series title | Scientific Investigations Map |
| Series number | 3537 |
| DOI | 10.3133/sim3537 |
| Publication Date | September 26, 2025 |
| Year Published | 2025 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Contributing office(s) | Earthquake Science Center, Pacific Coastal and Marine Science Center |
| Description | 2 Sheets: 23.66 × 40.73 inches; Data Release |
| Country | United States |
| State | Washington |
| Other Geospatial | Lake Sammamish |
| Online Only (Y/N) | Y |