You searched for: Author National Geophysical Data Center Remove constraint Author: National Geophysical Data Center Access Public Remove constraint Access: Public Subject Geomagnetism Remove constraint Subject: Geomagnetism Subject Magnetic fields Remove constraint Subject: Magnetic fields Subject Geoscientific Information Remove constraint Subject: Geoscientific Information Place Canada Remove constraint Place: Canada Place Alabama Remove constraint Place: Alabama Format Shapefile Remove constraint Format: Shapefile Bounding Box 50.273438 19.12441 59.589844 28.748397 Remove constraint Bounding Box: 50.273438 19.12441 59.589844 28.748397
1. Magnetic Field - Secular Variation of the Vertical Component of the Total Field Intensity for the Epoch 2010.0
2010. National Geophysical Data Center. This line shapefile shows lines of equal annual change (secular variation) in the vertical component of the total field intensity of the Earth's ma... National Atlas of the United States.
2010. National Geophysical Data Center. This line shapefile shows lines of equal vertical intensity of the Earth's magnetic field, derived from the International Geomagnetic Reference Fie... National Atlas of the United States.