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

Field Activity A198SC

Identifier A198SC
Alternate names A-1-98-SC
Purpose To identify active faults on shelf and inner basin slopes between Point Dume and Dana Point.
Description United States Geological Survey, Menlo Park, California. Chief Scientist: Bill Normark. Geophysical data (Huntec, 24channel) of field activity A-1-98-SC in Southern California from 08/09/1998 to 08/23/1998
Location Southern California
Summary Obtain multichannel and high resolution seismic data throughout study area.
Info derived Define active faults and potentially active faults that would affect Los Angeles
Comments Staff information imported from InfoBank Bill Normark (USGS Western Region) - Chief Scientist Ray Sliter (USGS Western Region) - Geophysicist Bob Bohannon (USGS Western Region) - Geophysicist Gita Dunhill (USGS Western Region) - Geologist Dave Scholl (USGS Western Region) - Geologist Jane Laursen (Aarhus Univ. Denmark) - Geologist Fred Payne (USGS Western Region) - Electronic Tech Larry Kooker (USGS Western Region) - Electronic Tech Graham Standan (Geoforce) - Tech Rep Hal Williams (USGS Western Region) - Mechanical Tech Walt Olson (USGS Western Region) - Mechanical Tech Lisa Schlender (Cascadia Research) - Marine Biologist Jen Quan (Cascadia Research) - Marine Biologist Kevin Blakley (Auriga) - Mate Russ Brisendine (Auriga) - Engineer Dick Corrigan (Auriga) - Captain Marcus Ballweber (Auriga) - Mate Paul Giron (Auriga) - Ab Ricky Labrador (Auriga) - Chef
Projects
Platform
Auriga
Itinerary
Start Redwood City, CA 1998-08-09
End Fish Harbor, CA 1998-08-23
Bounds
West -118.927
East -117.64443
North 34.00136
South 33.27702
Activity Geophysical

Personnel

Organization
2885 Mission Street
Santa Cruz, CA95060
(831) 460-7401
Principal investigators Normark, Bill
Crew members
Ray W Sliter
Scientist, Staff
David W Scholl
Scientist, Staff
Bohannon, Bob
Scientist, Staff
Dunhill, Gita
Scientist, Staff
Kooker, Larry
Scientist, Staff
Olson, Walt
Scientist, Staff
Payne, Fred
Scientist, Staff
Williams, Hal
Scientist, Staff
Affiliate staff Jane Laursen (Aarhus Univ. Denmark) - Geologist,Graham Standan (Geoforce) - Tech Rep,Lisa Schlender (Cascadia Research) - Marine Biologist,Jen Quan (Cascadia Research) - Marine Biologist,Kevin Blakley (Auriga) - Mate,Russ Brisendine (Auriga) - Engineer,Dick Corrigan (Auriga) - Captain,Marcus Ballweber (Auriga) - Mate,Paul Giron (Auriga) - Ab,Ricky Labrador (Auriga) - Chef

Data types and categories

Data category: Location-Elevation, Seismics
Data type: Navigation, Boomer, Multichannel

Equipment used

Equipment Usage description Data types Datasets
24channel Multichannel 5
navigation Navigation 2
Huntec Boomer 8

Datasets

Datasets produced in this activity

Dataset name Equipment Description Dataset contact
Multichannel data (stack data) 24channel Ray W Sliter
Raw seismic shot point data a-1-98-sc.400 24channel Bill Normark
Seismic FFID/Shot/CDP data a-1-98-sc.410_mcs 24channel Provisional best file Bill Normark
survey information 24channel multichanned 24 channel Bill Normark
Global positioning system (GPS) data a-1-98-sc.060 navigation Bill Normark
Global positioning system (GPS) data a-1-98-sc.062 navigation Bill Normark
Eotvos/course/speed/distance data a-1-98-sc.075 Huntec Bill Normark
Global positioning system (GPS) data a-1-98-sc.063 Huntec Bill Normark
Global positioning system (GPS) data a-1-98-sc.064 Huntec Bill Normark
NGDC MGD77 data Huntec Carolyn Hayashida Degnan
Raw depth (bathymetry) data a-1-98-sc.300 Huntec Bill Normark
Raw depth (bathymetry) data a-1-98-sc.300_062 Huntec Bill Normark
Raw depth (bathymetry) data a-1-98-sc.300_065 Huntec Provisional best file Bill Normark
survey information Huntec hi res Huntec Bill Normark

Datasets compiled from multiple sources

Dataset name Equipment Description Dataset contact
Multichannel seismic-reflection data acquired off the coast of southern California - Part A 1997, 1998, 1999, and 2000 24channel Multichannel seismic-reflection (MCS) data were collected in the California Continental Borderland as part of southern California Earthquake Hazards Task. Five data acquisition cruises conducted over a six-year span collected MCS data from offshore Santa Barbara, California south to the Exclusive Economic Zone boundary with Mexico. The primary mission was to map late Quaternary deformation as well as identify and characterize fault zones that have potential to impact high population areas of southern California. To meet its objectives, the project work focused on the distribution, character, and relative intensity of active (i.e., Holocene) deformation along the continental shelf and basins adjacent to the most highly populated areas. In addition, the project examined the Pliocene-Pleistocene record of how deformation shifted in space and time to help identify actively deforming structures that may constitute current significant seismic hazards. The MCS data accessible through this report cover the first four years of survey activity and include data from offshore Malibu coastal area west of Santa Monica, California to the southern survey limit offshore San Diego. The MCS data, which were collected with a 250-m-long, 24-channel streamer used a small gas-injector airgun source. This system provided optimum resolution of the upper 1 to 2 km of sediment for mapping active fault systems. The report includes trackline maps showing the location of the data, as well as both digital data files (SEG-Y) and images of all of the profiles. These data are also available via GeoMapApp (http://www.geomapapp.org/) and Virtual Ocean ( http://www.virtualocean.org/) earth science exploration and visualization applications. Ray W Sliter

Publications

Samples collected during this field activity