1. Coastal and Marine Hazards and Resources
  2. Geoscience Data System

Field Activity 2016-625-FA

Identifier 2016-625-FA
Also known as Queen Charlotte-Fairweather Marine Geohazards
Purpose 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.
Location Southeastern Alaska
Summary 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.
Info derived Seafloor morphology, backscatter and substrate structural mapping of the Queen Charlotte-Fairweather Fault System for seismic hazard assessments.
Comments 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.
Projects
Platform
Medeia
Owned and operated by the Alaska Department of Fish and Game
Vehicles
None
Itinerary
Start Juneau, AK 2016-05-17
End Juneau, AK 2016-06-12
Days in the field 27
Bounds
West -137.241
East -133.33496094
North 58.37867854
South 55.11237468

Personnel

Organization
2885 Mission Street
Santa Cruz, CA95060
(831) 460-7401
Principal investigators Daniel Brothers
Crew members
Jackson E Currie
Scientist, Staff
Robert M Wyland
Scientist, Staff
Information specialist(s)
Peter Dartnell
Specialist, Information
Jared W Kluesner
Specialist, Information
Affiliate principal Brian Andrews (WHSC)

Data types and categories

Data category: Location-Elevation, Seismics, Sonar
Data type: Navigation, Multichannel, Sparker, Multibeam

Equipment used

Equipment Usage description Data types Datasets
POS MV Navigation (no data reported)
Reson 7160 Multibeam 5
Other Unknown, Multichannel, Boomer, Sub Bottom Profiler, Sparker, Bubble Gun, Air Gun / Water Gun, Ocean Bottom Seismometer, Sonobuoy (no data reported)
24channel Multichannel 1

Datasets

Datasets produced in this activity

Dataset name Equipment Description Dataset contact
Multibeam backscatter data Reson 7160 Approximately 453 square kilometers of multibeam backscatter data gridded at 10-meter resolution. Brian Andrews
Multibeam bathymetric data Reson 7160 Approximately 453 square kilometers of multibeam bathymetry data gridded at 10-meter resolution. Brian Andrews
Multibeam bathymetry data between Cross Sound and Dixon Entrance, offshore southeastern Alaska Reson 7160 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. Alicia F Balster-gee
Trackline navigation Reson 7160 Trackline navigation collected with a Reson 7160 Multibeam echosounder in the eastern Gulf of Alaska Brian Andrews
Multichannel sparker seismic-reflection data between Cross Sound and Dixon Entrance, offshore southeastern Alaska 24channel 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. Alicia F Balster-gee

Datasets compiled from multiple sources

Dataset name Equipment Description Dataset contact
Bathymetric terrain model Reson 7160 Six different multibeam surveys covering the previously unmapped Queen Charlotte Fault offshore southeast Alaska and Haida Gwaii, Canada Brian Andrews

Datasets not currently associated with specific equipment

Dataset name Description Dataset contact
Data sources shapefile Shapefile showing extents of six different multibeam surveys covering the previously unmapped Queen Charlotte Fault offshore southeast Alaska and Haida Gwaii, Canada Brian Andrews

Publications

Samples collected during this field activity