NCEI (formerly NGDC)
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Geomagnetic Absolute Mean Values at Hourly Intervals from 220 Observatories Worldwide

This file is comprised of absolute mean hourly values of the geomagnetic components D, H and Z or X, Y and Z. These values, on magnetic tape, are available from approximately 220 of the 400 worldwide observatories which have ever operated. Most of the values were hand-scaled from the analog recordings (magnetograms) and were added to the file via punched cards. From some observations, for more recent years, there are means of values recorded directly on magnetic tape from digital magnetometers at various sample rates, for example, each minute. The accuracy of these data varies but is generally good, particularly for the more recent years. Approximately 60 observation-years of these data are added to the files each year.
Cite this dataset when used as a source.
Online Access
Distribution Formats
  • ASCII
Distributor DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
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
Documentation links not available.
Date(s)
  • publication: 1957-01-01
Edition: First
Dataset Progress Status Under development
Data Update Frequency: Irregular
Supplemental Information:
Observing station type: Geophysical Observatory. Data collection type: Network. Number of sites: 200 observatories.Quality control: The accuracy of these data varies but is generally good, particularly for the more recent years. Processing: Most of the values were hand-scaled from the analog recordings (magnetograms). In more recent years they include means of values recorded directly on magnetic tape from digital magnetometers at various sample rates, for example, each minute.
Purpose: Solar Wind/Magnetospheric Research
Use Limitations
  • While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
Originator(s)
  • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Publisher(s)
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Time Period: 1902-01-02 to Present
Spatial Bounding Box Coordinates:
N: 90.000000
S: -90.000000
E: 180.000000
W: -180.000000
Spatial Coverage Map:
Theme keywords
  • EARTH SCIENCE > Sun-earth Interactions > Ionosphere/Magnetosphere Particles
  • EARTH SCIENCE > SOLID EARTH > Geomagnetism > Magnetic Declination
  • EARTH SCIENCE > SOLID EARTH > Geomagnetism > Magnetic Intensity
  • Earth Science > Interior & Crust
  • Geomagnetism
  • Geomagnetic Components
Data Center keywords
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Place keywords
  • Global
Project keywords
  • ICSU-WDS > International Council for Science - World Data System
Use Constraints
  • Use Constraints: None
Access Constraints
  • Access Constraints: No Constraints
Fees
  • Depends on the amount of data requested
Lineage information for: repository
Processing Steps
  • 2015-04-22T00:00:00 - NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
Lineage information for: Scope not available.
Processing Steps
  • Mission Start Date
Acquisition Information (collection)
Instrument
  • MAGNETOMETERS
Platform
  • Ground Geomagnetic Observatories
Operation
  • CGC > Climate & Global Change
Last Modified: 2015-09-18
For questions about the information on this page, please email: Justin.Mabie@noaa.gov