2019-643-FA (CMHRP activity #8236)

Field Activity 2019-643-FA

Identifier

2019-643-FA

Purpose

To collect sediment cores for marine geohazard studies

Location

Northern California, Southern Oregon, United States, Pacific Ocean

Summary

Collected 36 piston cores, 2 gravity cores, 41 minisparker multichannel seismic profiles, and 100 chirp line segments that make up 42 total chirp profiles.

Info derived

Sediment age, character and distribution; fault characterization

Projects

Coastal and marine earthquake, tsunami, and landslide active margin field studies

Platform

Bold Horizon

Length 170 feet.

Vehicles

MarFac; Ford 650 Box truck - White G71-03559

Itinerary

Start	San Francisco, CA	2019-09-27
End	San Francisco, CA	2019-10-10
Days in the field	13

Bounds

West	-125.25388241
East	-124.07787323
North	41.76311745
South	40.2854841

Marine operations

Yes

Personnel

Organization

USGS, Pacific Coastal and Marine Science Center(PCMSC)

2885 Mission Street

Santa Cruz, CA95060

(831) 460-7401

Principal investigators

Hill, Jenna

Crew members

Janet Tilden Watt	Scientist, Staff
Gerald Hatcher	Scientist, Staff
Peter Dal Ferro	Scientist, Staff
Daniel Brothers	Scientist, Staff
Hill, Jenna	Scientist, Staff
McKee, Jennifer	Scientist, Staff

Information specialist(s)

Alicia F Balster-gee

Specialist, Information

Data types and categories

Data category:	Sampling, Seismics
Data type:	Geology, Sparker, Sub Bottom Profiler

Equipment used

Equipment	Data types	Datasets
pistoncore	Geology	1
512 chirp-source	Sub Bottom Profiler	(no data reported)
Other	Unknown, Multichannel, Boomer, Sub Bottom Profiler, Sparker, Bubble Gun, Air Gun / Water Gun, Ocean Bottom Seismometer, Sonobuoy	(no data reported)
512 chirp	Sub Bottom Profiler	1
Mini sparker	Sparker	(no data reported)
Gravity Core	Geology	1
48-channel streamer	Sparker	1

Datasets

Datasets produced in this activity

Dataset name	Equipment	Description	Dataset contact
Chirp sub-bottom data	512 chirp	Chirp sub-bottom data were collected by the U.S. Geological Survey in 2019 offshore Humboldt County of northern California to expand data coverage along the southern Cascadia Margin.	Alicia F Balster-gee
Multichannel minisparker seismic-reflection data	48-channel streamer	High-resolution multichannel seismic (MCS) data were collected by the U.S. Geological Survey in 2019 offshore Humboldt County of northern California to expand data coverage along the southern Cascadia Margin.	Alicia F Balster-gee

Datasets compiled from multiple sources

Dataset name	Equipment	Description	Dataset contact
Sediment core data from offshore southern Cascadia during field activity 2019-643-FA	pistoncore	Sediment core data including core imagery, multi-sensor core logger (MSCL) data, and radiocarbon age data.	Jenna C Hill
Sediment core data from offshore southern Cascadia during field activity 2019-643-FA	Gravity Core	Sediment core data including core imagery, multi-sensor core logger (MSCL) data, and radiocarbon age data.	Jenna C Hill