Science Explorer

Exploring: Magnetic Field (earth)

The magnetic field of the earth, 1980 magnetic horizontal intensity

Modified 2012-02-02
https://pubs.er.usgs.gov/publication/i1459 (HTML Document 15.48 KB)

The magnetic field of the earth, 1980 magnetic horizontal intensity IMAP 1459 The magnetic field of the earth, 1980 magnetic horizontal intensity ...

The magnetic field of the earth, 1980 magnetic vertical intensity

Modified 2012-02-02
https://pubs.er.usgs.gov/publication/i1460 (HTML Document 15.44 KB)

The magnetic field of the earth, 1980 magnetic vertical intensity IMAP 1460 The magnetic field of the earth, 1980 magnetic vertical intensity Series ...

The magnetic field of the earth, 1980 magnetic total intensity

Modified 2012-02-02
https://pubs.er.usgs.gov/publication/i1461 (HTML Document 15.43 KB)

The magnetic field of the earth, 1980 magnetic total intensity IMAP 1461 The magnetic field of the earth, 1980 magnetic total intensity Series title ...

Earth Science Week, Continued: Geomagnetism and the Self-Sustaining Dynamo Called Earth

https://www.usgs.gov/media/audio/earth-science-week-continued-geomagnetism-and-self-sustaining-dynamo-called-earth (HTML Document 49.02 KB)

Earth's magnetic field and what is it? And what causes it? And why the Earth's magnetic field is important? Duane Champion Sure Leslie. The Earth has ... going to talk about why we have poles. Not just the geographic poles around which the Earth rotates, but the Earth's magnetic poles. Today my guest ... turn in response to the earth's rotation to the east, and forms the magnetic field as we see it at the surface. The magnetic field protects the surface ... particles that come from the sun are not particularly healthy and the magnetic field protects us from that radiation. Leslie So today's magnetic field is it ...

Earth Science Week, Continued: Geomagnetism and the Self-Sustaining Dynamo Called Earth

https://www.usgs.gov/atom/11595 (HTML Document 49.02 KB)

Earth's magnetic field and what is it? And what causes it? And why the Earth's magnetic field is important? Duane Champion Sure Leslie. The Earth has ... going to talk about why we have poles. Not just the geographic poles around which the Earth rotates, but the Earth's magnetic poles. Today my guest ... turn in response to the earth's rotation to the east, and forms the magnetic field as we see it at the surface. The magnetic field protects the surface ... particles that come from the sun are not particularly healthy and the magnetic field protects us from that radiation. Leslie So today's magnetic field is it ...

Can the earth be dated from decay of its magnetic field?.

Modified 2012-03-12
https://pubs.er.usgs.gov/publication/70011351 (HTML Document 17.69 KB)

Can the earth be dated from decay of its magnetic field?. Journal of Geological Education The Publications Warehouse does not have links to digital ... as definitive proof that the earth is very young. Barnes is wrong, and has ignored or misrepresented much of the data on the earth's magnetic field ... . - Author Additional publication details Title: Can the earth be dated from decay of its magnetic field?. Series title: ... , El Paso, and a creationist, argues that the geomagnetic field was created by unknown processes at the time of creation of the earth and has been ...

The magnetic field of the Earth, 1990; vertical intensity chart

Modified 2012-02-10
https://pubs.er.usgs.gov/publication/gp1004Z (HTML Document 17.82 KB)

The magnetic field of the Earth, 1990; vertical intensity chart Geophysical Investigation Map 1004-Z Download citation as: RIS The magnetic field of ... the Earth, 1990; vertical intensity chart Series title: 1993 Language: ENGLISH Description: 1 map :col. ;63 x 100 cm., on sheet 86 x 123 cm. Scale ...

The magnetic field of the Earth, 1990; horizontal intensity chart

Modified 2012-02-10
https://pubs.er.usgs.gov/publication/gp1004H (HTML Document 17.84 KB)

The magnetic field of the Earth, 1990; horizontal intensity chart Geophysical Investigation Map 1004-H Download citation as: RIS The magnetic field ... of the Earth, 1990; horizontal intensity chart Series title: 1993 Language: ENGLISH Description: 1 map :col. ;63 x 100 cm., on sheet 86 x 123 cm. Scale ...

The magnetic field of the Earth, 1990; total intensity chart

Modified 2012-02-10
https://pubs.er.usgs.gov/publication/gp1004F (HTML Document 17.80 KB)

The magnetic field of the Earth, 1990; total intensity chart Geophysical Investigation Map 1004-F Download citation as: RIS The magnetic field of the ... Earth, 1990; total intensity chart Series title: 1993 Language: ENGLISH Description: 1 map :col. ;63 x 100 cm., on sheet 86 x 123 cm. Scale: 4005700 ...

The Magnetic field of the earth, 1985; total intensity chart

Modified 2012-02-10
https://pubs.er.usgs.gov/publication/gp987F (HTML Document 17.52 KB)

The Magnetic field of the earth, 1985; total intensity chart Geophysical Investigation Map 987-F The Magnetic field of the earth, 1985; total ...

A proposed International Geomagnetic Reference Field for 1965- 1985.

Modified 2012-03-12
https://pubs.er.usgs.gov/publication/70011657 (HTML Document 16.85 KB)

model using the secular variation models.-Authors spherical harmonic models Earth main magnetic field Magsat data Additional publication details Series title: ... citation as: RIS Abstract A set of spherical harmonic models describing the Earth's main magnetic field from 1965 to 1985 has been developed and is ... from magnetic observatory annual mean values. Models of the main field at 1965, 1970, 1975, and 1980 were obtained by extrapolating the main-field ... proposed as the next revision of the International Geomagnetic Reference Field (IGRF). A tenth degree and order spherical harmonic model of the main ...

Declination of the Earth 1590 - 1990

https://geomag.usgs.gov/products/movies/index.php?format=gif&type=declination (HTML Document 4.61 KB)

( Flash | GIF) Available Videos

Geomagnetism Research

https://www.usgs.gov/science/geomagnetism-research (HTML Document 41.82 KB)

Research projects within the USGS Geomagnetism Program are targeted for societal relevance, especially for space-weather hazard science.

Magnetic monitoring of earth and space

Modified 2016-10-05
https://pubs.er.usgs.gov/publication/70000364 (HTML Document 21.07 KB)

Physics Today Abstract For centuries, navigators of the world’s oceans have been familiar with an effect of Earth’s magnetic field: It imparts a ... accurate records of the magnetic-field direction and intensity at fixed locations and over long periods of time. Magnetic observatories were first ... can be used for so many purposes, one needs only to recall that the geomagnetic field is a continuum, connecting the different parts of Earth to each ... complicated field that exhibits a wide variety of time-dependent behavior. 1 In this article I review the status of the global community of magnetic ...

Core Radial Field of the Earth 1590 - 1990

https://geomag.usgs.gov/products/movies/index.php?format=gif&type=corefield (HTML Document 4.64 KB)

( Flash | GIF) Available Videos

Getting Down to Earth with Space Hazards

https://www.usgs.gov/news/getting-down-earth-space-hazards (HTML Document 57.59 KB)

magnetic and electric field variation over time. Data from such surveys allow scientists to construct three-dimensional models of the Earth’s interior ... electrical conductivity structure. These models, in turn, enable scientists to estimate electric fields that can be generated in the Earth during magnetic ... United States to determine whether or not geoelectric fields induced in the Earth during a magnetic storm could be mapped. Their analysis showed that ... the USGS. The USGS Geomagnetism Program monitors variations in the Earth’s magnetic field through a network of 14 ground-based observatories around the ...

Getting Down to Earth with Space Hazards

https://www.usgs.gov/news/getting-down-earth-space-hazards (HTML Document 57.59 KB)

magnetic and electric field variation over time. Data from such surveys allow scientists to construct three-dimensional models of the Earth’s interior ... electrical conductivity structure. These models, in turn, enable scientists to estimate electric fields that can be generated in the Earth during magnetic ... United States to determine whether or not geoelectric fields induced in the Earth during a magnetic storm could be mapped. Their analysis showed that ... the USGS. The USGS Geomagnetism Program monitors variations in the Earth’s magnetic field through a network of 14 ground-based observatories around the ...

Interpretation of long- and short-wavelength magnetic anomalies

Modified 2014-06-18
https://pubs.er.usgs.gov/publication/70112909 (HTML Document 18.89 KB)

models of the global magnetic field, and extending methods for interpreting long-wavelength magnetic anomalies preceded this launch Magnetic data collected ... by satellite can be interrupted by using a method of analysis that quantitively describes the magnetic field resulting from three-dimensional ... included in the same magnetic field calculations. This single reference system also simplified adjustments in position and direction to account for ... the external field, the component normal to each face is obtained by using an expression for the solid angle subtended by a generalized polygon. The ...

Getting Down to Earth with Space Hazards

https://www.usgs.gov/node/722498 (HTML Document 57.59 KB)

magnetic and electric field variation over time. Data from such surveys allow scientists to construct three-dimensional models of the Earth’s interior ... electrical conductivity structure. These models, in turn, enable scientists to estimate electric fields that can be generated in the Earth during magnetic ... United States to determine whether or not geoelectric fields induced in the Earth during a magnetic storm could be mapped. Their analysis showed that ... the USGS. The USGS Geomagnetism Program monitors variations in the Earth’s magnetic field through a network of 14 ground-based observatories around the ...

Tectonomagnetic effects

Modified 2016-04-07
https://pubs.er.usgs.gov/publication/70169278 (HTML Document 18.42 KB)

, such as ground strain, or the indirect effects, such as changes in resistivity, strain, changes in seismic velocity or changes in magnetic field, and so ... (seismomagnetic effects). Second, a long-term monitoring of the magnetic field in the vicinity of an active fault to detect magnetic changes due to general ... of the actual stress within the Earth and its changes with time are very difficult. It is much easier to monitor the direct effects of this stress ... a few instruments. It derives from the piezomagnetic properties of rocks (that is, the change in rock magnetization and, therefore, local magnetic ...