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USGS Coastal and Marine Geology Program

Field Activity Details for field activity 2016-654-FA

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AKA: none

Other ID: none

Status: Completed

Organization(s): USGS, Pacific Coastal and Marine Science Center

Funding Program(s): Other (Other)

Principal Investigator(s): Maureen Walton, Other

Affiliate Investigator(s): Peter Haeussler USGS Ancorage Alaska Science Center; Sean Gulick, the University of Texas at Austin Institute for Geophysics; Bobby Reece, Texas A&M University

Information Specialist(s): Patrick Hart, Maureen Walton

Data Type(s): Location-Elevation: Navigation, Seismics: Multichannel, Seismics: Sparker, Sonar: Multibeam, Sonar: Sidescan, Sonar: Sound Velocity

Scientific Purpose/Goals: To map faults related to Yakutat Terrane subduction using multi-channel seismic reflection, and to obtain high-resolution bathymetry data in Taan Fjord, which recently saw a large landslide and tsunami.

Vehicle(s): None

Start Port/Location: Homer, AK

End Port/Location: Homer, AK

Start Date: 2016-08-02

End Date: 2016-08-17

Equipment Used: multibeam, soundvelocityprofiler, sparker, GPS, navigation, POS MV, Surface Wave Source, 24channel, multichannel, Sparker, side scan sonar

Information to be Derived: Multichannel seismic, multibeam bathymetry

Summary of Activity and Data Gathered: data submitted to FAD on 8/30/2016; ctds, MCS, multibeam, Pos_config, readme, Taan2016_log

Staff: Other

Affiliate Staff:

Notes: Field study funded by the USGS Earthquake Hazards Program and in part by NSF. Fieldwork was led by Sean Gulick at the University of Texas at Austin Institute for Geophysics (UTIG), Maureen Walton (USGS Pacific Coastal and Marine Science Center), and Peter Haeussler (Alaska Science Center). Bobby Reece (Texas A&M University) participated in the cruise as a co-investigator. All equipment except for the R/V Alaskan Gyre was borrowed from other institutions. Equipment used includes a Dura-Spark 240 sparker source (Texas A&M); a 24 channel, 75 m high-resolution receiver streamer (UTIG); a 24 channel, 150-m MicroEel receiver streamer (Texas A&M); a Reson SeaBat T50-P multibeam sonar (UTIG), which also collected sidescan sonar data; a CastAway CTD velocity profiler (UTIG); and several navigation systems including two GPS units (UTIG, Texas A&M) and an Applanix POS MV system (UTIG). Navigation data should be available in MCS headers and in multibeam files.

Location:

Icy Bay, Alaska

Boundaries
North: 60.35514924 South: 59.64543994 West: -142.35 East: -140.78976004

Platform(s):

photo of Alaskan Gyre
Alaskan Gyre

Publications

Portals/Viewers

Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
multibeamReson SeaBat T50-P sonar, also used to collect sidescan sonar data. Used in conjunction with POS MV positioning system.Multibeam
soundvelocityprofilerA CastAway CTD profiler was used to acquire sound velocity information to be applied to the multibeam data.Sound Velocity
sparkerApplied Acoustics Dura-Spark 240Sparker
GPS --- Navigation
navigation --- Navigation
POS MV --- Navigation
Surface Wave Source --- Multichannel
24channel --- Multichannel
multichannel --- Multichannel
Sparker --- Sparker
side scan sonar --- Sidescan

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