title: Geophysics. Mapping long-term changes in Earth's magnetic field.
authors.affiliation: Institute of Geophysics and Planetary Physics, University of California at San Diego, La Jolla, CA 92093, USA. cljohnson@ucsd.edu
authors.forename: Catherine L
authors.initials: CL
authors.lastname: Johnson
authors.forename: Catherine G
authors.initials: CG
authors.lastname: Constable
authors.forename: Lisa
authors.initials: L
authors.lastname: Tauxe