Worldwide Magnetograms with Geomagnetic Components D, H, Z, or X, Y, and Z
The NOAA National Centers for Environmental Information (formerly National Geophysical
Data Center) receives magnetograms from over 200 geomagnetic observatories. The Center
archives data from 1867 to the present, however the primary holdings are from 1957
to the present. The archives contain over 5,000 reels of 35 mm microfilm copies of
magnetograms. Magnetograms are records obtained from an instrument known as a magnetometer
which is designed to measure small variations in the components of the geomagnetic
field. There are two types of magnetometers, the La Cour and the Ruska. The magnetogram
consists of one or more (usually 3) variometers, one for each element usually D, H,
Z (less common X, Y, Z) and a recorder. The standard magnetogram usually has all three
components recorded simultaneously on one sheet of paper. In addition to the 3 traces,
reference lines (baselines) are recorded. The baselines are used in absolute calibration
of the magnetogram. The normal recording speed is 20 mm/hour with the drum turning
once in 24 hours.
Cite this dataset when used as a source.
- ID not available.
gov.noaa.ngdc.stp.geomag:G00583
Other Access | Online access information not available. |
Distribution Formats | Format not available
|
Ordering Instructions | Non-Digital Form: 35mm Film Reels Ordering Instructions: Data is currently available only on microfiche. Custom Order Process: Contact data center for information |
Distributor | Justin Mabie Space and Terrestrial Weather Specialist DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce (303) 497-6135 Justin.Mabie@noaa.gov |
Dataset Point of Contact | Justin Mabie Space and Terrestrial Weather Specialist DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce (303) 497-6135 Justin.Mabie@noaa.gov |
Time Period | 1957-01-01 to Present |
Spatial Bounding Box Coordinates |
West:-180.000000
East:180.000000
South:-90.000000
North:90.000000
|
Spatial Coverage Map |
Documentation links not available. |
Publication Dates |
|
Edition | First |
Dataset Progress Status | Under development - data is currently in the process of being created |
Data Update Frequency | Weekly |
Purpose | Geomagnetic Research |
Use Limitations |
|
Originators |
|
Publishers |
|
Theme keywords | NASA/GCMD Earth Science Keywords
|
Data Center keywords | Global Change Master Directory (GCMD) Data Center Keywords
|
Place keywords | NASA/GCMD Location Keywords
|
Project keywords | Global Change Master Directory (GCMD) Project Keywords
|
Use Constraints |
|
Access Constraints |
|
Fees |
|
Processing Steps |
|
Instrument |
|
Platform |
|
Operation |
|
Last Modified: 2015-09-18
For questions about the information on this page, please email:Justin.Mabie@noaa.gov