Field Activity 2016-654-FA

Identifier 2016-654-FA
Purpose 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.
Location Icy Bay, Alaska
Summary data submitted to FAD on 8/30/2016; ctds, MCS, multibeam, Pos_config, readme, Taan2016_log
Info derived Multichannel seismic, multibeam bathymetry
Comments 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.
Alaskan Gyre
Start Homer, AK 2016-08-02
End Homer, AK 2016-08-17
Days in the field 15
West -142.35
East -140.78976004
North 60.35514924
South 59.64543994


2885 Mission Street
Santa Cruz, CA95060
(831) 460-7401
Principal investigators Maureen AL Walton
Crew members
(not identified)
Scientist, Staff
Information specialist(s)
Patrick E Hart
Specialist, Information
Maureen AL Walton
Specialist, Information
Affiliate principal Peter Haeussler USGS Ancorage Alaska Science Center; Sean Gulick, the University of Texas at Austin Institute for Geophysics; Bobby Reece, Texas A&M University

Data types and categories

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

Equipment used

Equipment Usage description Data types Datasets
multibeam Reson SeaBat T50-P sonar, also used to collect sidescan sonar data. Used in conjunction with POS MV positioning system. Multibeam (no data reported)
soundvelocityprofiler A CastAway CTD profiler was used to acquire sound velocity information to be applied to the multibeam data. Sound Velocity (no data reported)
sparker Applied Acoustics Dura-Spark 240 Sparker (no data reported)
GPS Navigation (no data reported)
navigation Navigation (no data reported)
POS MV Navigation (no data reported)
Surface Wave Source Multichannel (no data reported)
24channel Multichannel (no data reported)
multichannel Multichannel (no data reported)
Sparker Sparker (no data reported)
side scan sonar Sidescan (no data reported)


Samples collected during this field activity