UC Berkeley GeoData Repository

Start Over Place Rocky Mountains Creator National Geophysical Data Center Bounding Box -180 -89.81531 180 89.456192

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.

2. Magnetic Field - Vertical Component of the Total Field Intensity for the Epoch 2010.0

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.