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

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Abstract/Contents

Abstract
This line shapefile shows lines of equal annual change (secular variation) in the vertical component of 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 change in intensity is measured in nanoTeslas per year. This layer is part of the 1997-2014 edition National Atlas of the United States.
Purpose
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.

Description

Type of resource cartographic, software, multimedia
Form Shapefile
Extent 0.629
Publisher National Atlas of the United States
Date valid 2010
Publication date 2011
Language English
Digital origin born digital
Map data Scale not given. ; EPSG::4269 W 179°49ʹ45ʺ--E 179°12ʹ9ʺ/N 85°46ʹ32ʺ--N 3°26ʹ10ʺ, Scale not given ; EPSG::4326

Creators/Contributors

Creator National Geophysical Data Center

Subjects

Subject Geomagnetism
Subject Magnetic fields
Subject Alabama
Subject Arizona
Subject Arkansas
Subject Colorado
Subject Connecticut
Subject Delaware
Subject Florida
Subject Georgia
Subject Idaho
Subject Illinois
Subject Indiana
Subject Iowa
Subject Kansas
Subject Kentucky
Subject Louisiana
Subject Maine
Subject Maryland
Subject Massachusetts
Subject Michigan
Subject Minnesota
Subject Mississippi
Subject Missouri
Subject Montana
Subject Nebraska
Subject Nevada
Subject New Hampshire
Subject New Jersey
Subject New Mexico
Subject New York (State)
Subject North Carolina
Subject North Dakota
Subject Ohio
Subject Oklahoma
Subject Oregon
Subject Pennsylvania
Subject Rhode Island
Subject Rocky Mountains
Subject South Carolina
Subject South Dakota
Subject Tennessee
Subject Texas
Subject Utah
Subject Vermont
Subject Virginia
Subject Washington (D.C.)
Subject Washington (State)
Subject West Virginia
Subject Wisconsin
Subject Wyoming
Subject United States
Subject Canada
Subject Mexico
Subject Alaska
Subject Hawaii
Subject 2010
Subject Geoscientific Information
Genre Geospatial data
Genre Cartographic dataset

Bibliographic information

Supplemental information The vertical component (Z) and the secular variation (ZSV, the time rate of change of Z) of the IGRF change smoothly over most of the Earth. For more information about the geomagnetic field, please visit <http://www.ngdc.noaa.gov/geomag/faqgeom.shtml.>
WGS84 Cartographics This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.
Location https://purl.stanford.edu/tf850kx9173

Access conditions

Use and reproduction
This item is in the public domain. There are no restrictions on use.
Copyright
This work is in the Public Domain, meaning that it is not subject to copyright.

Preferred citation

National Atlas of the United States. (2011). Magnetic Field - Secular Variation of the Vertical Component of the Total Field Intensity for the Epoch 2010.0. National Atlas of the United States. Available at: http://purl.stanford.edu/tf850kx9173.

Collection

National atlas of the United States of America, 1997-2014

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