Early magnetic profiles from PIONEER surveys.
Shows repeating pattern and offset at Mendocino Fracture Zone.
Serendipitous that survey lines primarily east-west.
Otherwise magnetic striping would not have showed clearly
Image ID: theb2713, Voyage To Inner Space - Exploring the Seas With NOAA Collect Location: Mendocino Fracture Zone, Northeast Pacific Photo Date: 1959? Credit: C&GS Season's Report Jones 1960-2