AKA: Queen Charlotte-Fairweather Marine Geohazards
Other ID: none
Status: Completed
Organization(s): USGS, Pacific Coastal and Marine Science Center
Funding Program(s): Coastal and marine earthquake, tsunami, and landslide active margin field studies (ZP00EQV)
Principal Investigator(s): Daniel Brothers
Affiliate Investigator(s): Brian Andrews (WHSC)
Information Specialist(s): Peter Dartnell, Jared Kluesner
Data Type(s): Location-Elevation: Navigation, Seismics: Multichannel, Seismics: Sparker, Sonar: Multibeam
Scientific Purpose/Goals: Seismic and tsunamigenic hazard assessment along the Queen Charlotte-Fairweather Fault System in southeastern Alaska. This fault has generated more than 6 magnitude &+ earthquakes in the last 150 years. Very little modern marine geophysical data exist along its length.
Vehicle(s): None
Start Port/Location: Juneau, AK
End Port/Location: Juneau, AK
Start Date: 2016-05-17
End Date: 2016-06-12
Equipment Used: POS MV, Reson 7160, Other, 24channel
Information to be Derived: Seafloor morphology, backscatter and substrate structural mapping of the Queen Charlotte-Fairweather Fault System for seismic hazard assessments.
Summary of Activity and Data Gathered: water column backkscatter submitted to FAD 3/10/2017 BATHYMETRY: Collected 4,178 linear km of Reson 7160 Multibeam data covering 4,621 square kms of the shelf/slope waters between Cross Sound in the north and Noyes Canyon to the south. Depth range between 110-2140 meters. MULTICHANNEL SEISMICS: Collected approximately XXXX kms of multichannel seismic profiles.
Staff: Jackson Currie, Robert Wyland
Affiliate Staff:
Notes: Mob and Demob will be in Juneau aboard the R/V Medeia, a vessel owned and operated by the Alaska Department of Fish and Game. Mob/demob will be for several days on either end of the actual cruise dates. TerraSond was contracted to lead mob/demob for multibeam sonar data acquisition. They will provide a Reson 7160 and all peripherals. USGS will provide high-res MCS sparker acquisition.
Location:
Southeastern Alaska
| Boundaries | |||
|---|---|---|---|
| North: 58.37867854 | South: 55.11237468 | West: -137.241 | East: -133.33496094 |
Platform(s):
Medeia |
Balster-Gee, A.F., Andrews, B.D., Brothers, D.S., ten Brink, U.S., Kluesner, J.W., and Haeussler, P.J., 2017, Multibeam and multichannel sparker seismic-reflection data between Cross Sound and Dixon Entrance, offshore southeastern Alaska, collected from 2016-05-17 to 2016-06-12 during field activity 2016-625-FA: U.S. Geological Survey data release.
Prouty, N.G., Brothers, D.S., Kluesner, J.W., Barrie, J.V., Andrews, B.D., Lauer, R.M., Greene, H.G., Conrad, J.E., Lorenson, T.D., Law, M.D., Sahy, D., Conway, K., McGann, M.L., and Dartnell, P., 2020, Focused fluid flow and methane venting along the Queen Charlotte fault, offshore Alaska (USA) and British Columbia (Canada): Geosphere, v. 16 no. 6, pp. 1336–1357, doi: 10.1130/GES02269.1.
Andrews, B.D., Brothers, D.S., Dartnell, P., and Barrie, J.V., 2022, A bathymetric terrain model of multibeam sonar data collected between 2005 and 2018 along the Queen Charlotte Fault System in the Eastern Gulf of Alaska from Cross Sound, Alaska to Queen Charlotte Sound, Canada: U.S. Geological Survey data release, https://doi.org/10.5066/P9YGDHIQ.
Andrews, B.D., Brothers, D.S., ten Brink, U.S., Kluesner, J.W., Haeussler, P.J., Wyland, R.M., and Currie, J.E., 2022, Multibeam bathymetric and backscatter data collected in the eastern Gulf of Alaska along the Queen Charlotte Fault, U.S. Geological Survey Field Activity 2016-625-FA: U.S. Geological Survey data release, https://doi.org/10.5066/P9BTWEXK.
| Survey Equipment | Survey Info | Data Type(s) | Data Collected |
|---|---|---|---|
| POS MV | --- | Navigation | |
| Reson 7160 | --- | Multibeam | Multibeam backscatter data (Approximately 453 square kilometers of multibeam backscatter data gridded at 10-meter resolution.) Multibeam bathymetric data (Approximately 453 square kilometers of multibeam bathymetry data gridded at 10-meter resolution.) Trackline navigation (Trackline navigation collected with a Reson 7160 Multibeam echosounder in the eastern Gulf of Alaska) Multibeam bathymetry data between Cross Sound and Dixon Entrance, offshore southeastern Alaska (This data release contains approximately 4,600 square kilometers of multibeam bathymetry and backscatter data, organized into zip files for each Julian Day of the survey.) |
| Other | --- | --- | --- |
| 24channel | --- | Multichannel | Multichannel sparker seismic-reflection data between Cross Sound and Dixon Entrance, offshore southeastern Alaska (Multichannel sparker (MCS) seismic-reflection data were collected along the Queen Charlotte-Fairweather Fault between Cross Sound and Dixon Entrance, offshore southeastern Alaska from 2016-05-17 to 2016-06-12. Data were collected aboard the Alaska Department of Fish and Game R/V Medeia, and recorded using a 32 channel GeoEel digital streamer, an Applied Acoustics power supply, and a SIG SLP 790 Sparker Electrode. MCS profiles were collected coincident with multibeam data collected at higher survey speeds (5-6 knots), which reduced the MCS data quality.) |
