USGS CMG A-1-00-SC Metadata

leg 1: identify fault and landslide hazards in the offshore
area of Southern California. The study areas were selected to
(a) obtain multichannel and high-resolution seismic-reflection data
    inside the 3-mile limit between Port Hueneme and the Mexican border; and
(b) extend data coverage within a relatively unsurveyed segment of the
    margin seaward of the shelf between Dana Point and San Diego,
    California.

leg 2: to obtain multichannel and high-resolution data in
       Los Angeles/Long Beach harbor and adjacent shelf for study of
       salt-water intrusion in local aquifers.

Identify and map active and potentially active faults, folds,
and submarine slide-prone areas that may threaten densely populated
areas of Southern California.  Map pathways of salt-water intrusion
into local aquifers critical to the large population of the greater
Los Angeles metropolitan area.

Extensive high-resolution geopulse and huntec data were
collected within the 3-mile limit and farther seaward in areas
sparsely surveyed during previous operations, as well as in the
Los Angeles / Long Beach harbor and adjacent shelf. Problems with
the minisparker power supplies prevented its use during much of
the cruise, despite unflagging efforts by the shipboard engineering
and electronic technicians.  In the end, only 36 hours of multichannel
minisparker data were collected in the harbor/shelf area and an
additional 10 hours in the shelf and slope area east of Port Hueneme.
1200 line-km geopulse (960 hazards, 240 aquifers)
1400 line-km huntec (1300 hazards, 100 aquifers)
470 line-km minisparker (100 hazards, 370 aquifers)

Gutmacher, Christina E., Normark, William R., Ross, Stephanie L., Edwards,
Brian, Sliter, Ray, Hart, Patrick, Cooper, Becky, Childs, Jon, and Reid,
Jane, 2000, Cruise report for A1-00-SC Southern California earthquake hazards
project, Part A: U.S. Geological Survey Open-File Report 00-516:

walrus.wr.usgs.gov/reportsof00-516

Fisher, Michael, Normark, William, Langenheim, Victoria, Calvert, Andrew
and Sliter, Ray, 2004, Marine geology and earthquake hazards of the San Pedro
shelf region, Southern California: U.S. Geological Survey Professional Paper
1687, URL:
http://pubs.usgs.gov/pp/pp1687/

Wolf, Stephen C., and Gutmacher, Christina E., 2004,
Geologic and bathymetric reconnaissance overview of
the San Pedro Shelf region, Southern California:
U.S. Geological Survey Open-File Report 2004-1049,
7 sheets, scales range from 1:43,000 to 1:174,000, URL:
http://pubs.usgs.gov/of/2004/1049/