Chinook salmon and green sturgeon migrate through San Francisco Estuary despite large distortions in the local magnetic field produced by bridges
Fig 1
Overview of the Trans Bay Cable route and survey area.
The Trans Bay Cable (dark blue line) conducts electricity from the city of Pittsburg, CA to San Francisco. Magnetic field surveys were conducted over an area with a width of 1 km (pink survey lines) at the following sites: 1) Benicia Bridge, 2) San Pablo Bay, 3) Richmond Bridge, and 4) Bay Bridge. The inset shows both a picture of the cable and its construction.