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

Description:

This line shapefile shows lines of equal annual change (secular variation), in the total field intensity of the Earth's magnetic field, derived from the International Geomagnetic Reference Field (IGRF) for the epoch 2010.0. Magnetic intensity is the strength of the magnetic field, and is described in terms of a horizontal component and a vertical component. The total field intensity is the strength of the field, not divided into its component parts. The change in intensity is measured in nanoTeslas per year. This layer is part of the 1997-2014 edition of the 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 U.S. Geological Survey in the use of these data. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.

Creator:

National Geophysical Data Center

Publisher:

National Atlas of the United States

Provider:

Stanford

Resource Class:

Datasets

Resource Type:

Line data

Subject:

Geomagnetism and Geoscientific Information

Temporal Coverage:

2010

Date Issued:

2011

Spatial Coverage:

United States, Alaska, Alabama, Arizona, Arkansas, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York (State), North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington (D.C.), Washington (State), West Virginia, Wisconsin, Wyoming, Puerto Rico, United States Virgin Islands, Cuba, North America, Mexico, and Canada

Rights:

This item is in the public domain. There are no restrictions on use.

Rights Holder:

This work is in the Public Domain, meaning that it is not subject to copyright.

Access Rights:

Public

Format:

Shapefile

Georeferenced:

More details at:

https://purl.stanford.edu/wc571cd7743