K Indices of Magnetic Activity Relative to an assumed Quiet-day for each 3-Hour Period
The NOAA National Centers for Environmental Information (formerly National Geophysical
Data Center) receives the K indices on a current basis from approximately 85 observatories.
The K index is a quasi-logarithmic local index of the 3-hourly range in magnetic activity
relative to an assumed quiet-day curve for the recording site. First introduced by
J. Bartels in 1938, it consists of a single digit 0 through 9 for each 3-hourly interval.
The K indices are received on a monthly basis from the various observatories and are
available from 1938 to present. The NOAA National Centers for Environmental Information (formerly National Geophysical Data Center) also receives KP indices from the Institute for Geophysik in Gottingen, Germany on a monthly basis. The KP index is a planetary index based on the K index from 12 or 13 selected stations and has been derived routinely from 1932.
available from 1938 to present. The NOAA National Centers for Environmental Information (formerly National Geophysical Data Center) also receives KP indices from the Institute for Geophysik in Gottingen, Germany on a monthly basis. The KP index is a planetary index based on the K index from 12 or 13 selected stations and has been derived routinely from 1932.
Cite this dataset when used as a source.
- ID not available.
gov.noaa.ngdc.stp.indices:G00590
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Ordering Instructions | Ordering Instructions: Data is available via our FTP site 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 | 1938-01-01 to Present |
Spatial Bounding Box Coordinates |
West:-180.000000
East:180.000000
South:-90.000000
North:90.000000
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Spatial Coverage Map |
Documentation links not available. |
Publication Dates |
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Edition | First |
Dataset Progress Status | Under development - data is currently in the process of being created |
Data Update Frequency | Irregular |
Purpose | Magnetic Activity Research |
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Theme keywords | NASA/GCMD Earth Science Keywords
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Data Center keywords | Global Change Master Directory (GCMD) Data Center Keywords
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Place keywords | NASA/GCMD Location Keywords
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Project keywords | Global Change Master Directory (GCMD) Project Keywords
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Last Modified: 2015-09-18
For questions about the information on this page, please email:Justin.Mabie@noaa.gov