GeoData @ UCB

Magnetic Field - Secular Variation of the Declination Component for the Epoch 2010.0

Author(s):
Description:
This map layer shows isoporic lines (lines of equal annual change, or secular variation, in the declination of the Earth's magnetic field), derived from the International Geomagnetic Reference Field (IGRF) for the epoch 2010.0. Magnetic declination is the angle between true north and magnetic north (the direction of the magnetic field vector) in the horizontal plane. The change is measured in arc minutes per year. This layer is part of the 1997-2014 edition National Atlas of the United States.These data are intended for geographic display and analysis at the national level, and for large regional areas. The data should be displayed and analyzed at scales appropriate for 1:2,000,000-scale data. No responsibility is assumed by the National Atlas of the United States or the U.S. Geological Survey in the use of these data.
Publisher:
National Atlas of the United States
Place(s):
Vermont, Washington, Georgia, California, New York, South Carolina, Illinois, Minnesota, USA, Wisconsin, Delaware, Connecticut, New Mexico, Indiana, Arizona, Oklahoma, Maryland, District of Columbia, Greenland, Oregon, Iowa, Caribbean, Louisiana, Rhode Island, Florida, Maine, Mississippi, North America, New Hampshire, North Dakota, U.S. Virgin Islands, Utah, United States, Kansas, Nevada, Kentucky, Tennessee, Canada, West Virginia, Alabama, Colorado, Pennsylvania, Wyoming, Montana, Michigan, New Jersey, Arkansas, South Dakota, Cuba, Ohio, Massachusetts, Iceland, Texas, Virginia, Mexico, Hawaii, Idaho, Nebraska, North Carolina, Puerto Rico, Missouri, Virgin Islands, and Alaska
Subject(s):
Geomagnetism, Magnetic declination, Geomagnetism--Secular variations, and Geoscientific Information
Year:
2010
Held by:
Stanford
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