2018-641-FA (CMHRP activity #7917)

Field Activity 2018-641-FA

Identifier

2018-641-FA

Purpose

Geologic framework and habitat geophysics in Federal Waters of South Central California for offshore energy hazards and impacts.

Location

South Central California

Summary

Chirp, MCS, and YoNav data submitted to FAD by Maureen Walton 10/10/2018

Info derived

Bathymetry, backscatter intesity, seismic profiles.

Comments

Cruise will be run on two legs on the NOAA Ship Rainier with some staff swap outs.

Projects

Marine Geomorphology, Evolution, and Habitats

Platform

Rainier

Length 231 feet; beam 42 feet; draft 17 feet. Launched 1967, USCGS (United States Coast and Geodetic Survey) owned 1968 to 1970. NOAA acquired in 1970. She is named for Mount Rainier in the state of Washington and is the sister ship of NOAAS Fairweather and the decommissioned NOAAS Mount Mitchell.

Vehicles

None

Itinerary

Start	San Francisco	2018-08-27
End	Los Angeles	2018-09-22
Days in the field	22

Bounds

West	-121.98
East	-120.94
North	35.83
South	34.53

Personnel

Organization

USGS, Pacific Coastal and Marine Science Center(PCMSC)

2885 Mission Street

Santa Cruz, CA95060

(831) 460-7401

Principal investigators

Guy R CochraneMaureen AL Walton

Crew members

Ray W Sliter	Scientist, Staff
Jackson E Currie	Scientist, Staff
Robert M Wyland	Scientist, Staff
Jared W Kluesner	Scientist, Staff
Rachel K Marcuson	Scientist, Staff
Daniel J Kennedy	Scientist, Staff

Information specialist(s)

Evan T Dailey

Specialist, Information

Affiliate principal

Lisa Gilbane

Data types and categories

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

Equipment used

Equipment	Data types	Datasets
Yonav	Navigation	(no data reported)
Other	Unknown, Multichannel, Boomer, Sub Bottom Profiler, Sparker, Bubble Gun, Air Gun / Water Gun, Ocean Bottom Seismometer, Sonobuoy	(no data reported)
Multichannel	Multichannel	1
512 chirp-source	Sub Bottom Profiler	(no data reported)
512 chirp	Sub Bottom Profiler	1
Sparker	Sparker	(no data reported)
Other	Unknown, Multibeam, Single Beam, Sidescan, Interferometric, Sound Velocity	(no data reported)

Datasets

Datasets produced in this activity

Dataset name	Equipment	Description	Dataset contact
High-resolution multi-channel seismic-reflection data	Multichannel	Multi-channel seismic (MCS) reflection data were collected as part of a geophysical survey aboard the NOAA Ship Rainier during two legs at sea, the first from 8/28/2018 to 9/7/2018 and the second from 9/10/2018 to 9/21/2018. The data were collected using a SIG 2-Mille minisparker and a 64-channel streamer, although the majority of the survey was conducted using a 56-channel setup due to technical issues with one 8-channel section early on in the survey. The MCS data were processed to post-stack time migration and include filtering and other noise removal corrections.	Daniel J Kennedy
High-resolution Chirp seismic-reflection data	512 chirp	High-resolution Chirp seismic-reflection data were collected offshore south-central California as part of a geophysical survey aboard the NOAA Ship Rainier during two legs at sea, the first from 8/28/2018 to 9/7/2018 and the second from 9/10/2018 to 9/21/2018. The data were collected using an Edgetech 512i towfish with a 1-6 kHz sweep. Consistently high winds and rough seas prevented additional Chirp data collection and caused noisy data in some cases, especially during the second leg of the survey, which largely took place in the southern part of the study area. The Chirp data were post-processed to include filtering and other noise removal corrections.	Daniel J Kennedy