For
the first time, scientists are using advanced technology and an innovative
vessel to study, image, and map the unexplored offshore Northern San Andreas
Fault from north of San Francisco to its termination at the junction of three
tectonic plates off Mendocino, California.
The
team includes scientists from NOAA’s National Marine Fisheries Service, Oregon State
University, the California Seafloor Mapping
Program, the U.S. Geological Survey and Woods Hole Oceanographic
Institution. The expedition which concludes Sunday is sponsored by NOAA’s Office of Ocean Exploration
and Research.
While
the fault on land is obscured by erosion, vegetation
and urbanization in many places, scientists expect the subsea portion
of the
fault to include deep rifts and high walls, along with areas supporting
animal
life. The expedition team is using high-resolution sonar mapping,
subsurface
seismic data and imaging with digital cameras for the first-ever
three-dimensional bathymetric-structural map that will model the
undersea Northern San Andreas Fault and its structure. Little is
known about the offshore fault due to perennial bad weather that has
limited
scientific investigations.