National Geophysical Data Center (NGDC), NOAA Satellite and Information Service

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Values of Kp Indices, Ap Indices, Cp Indices, C9 Indices, Sunspot Number, and 10.7 cm Flux

This data file consists of Kp indices, Ap indices, Cp indices, C9 indices, sunspot number, and 10.7 cm flux. The most often requested parameter of this file are the Kp indices. These planetary indices are derived from the K indices ( a quasi-logarithmic three-hourly measure of magnetic activity ranging from 0 for the least disturbed periods to 9 for the most disturbed) from 12 observatories located between 46 degrees north geomagneticlatitude and 63 degrees south geomagnetic latitude.

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Distributor Distributor information not available
No point of contact available for this dataset
Documentation links not available.
  • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • publication: 1957-01-01
Edition: First
Dataset Progress Status Under development
Data Update Frequency: Monthly
Purpose: Magnetic Activity 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.
Time Period: 1932-01-01  to  Present
Spatial Bounding Box Coordinates:
N: 46.00
S: -63.00
E: 180.00
W: -180.00
Spatial Coverage Map:
  • Earth Science > Solid Earth > Geomagnetism > Geomagnetic Indices
  • Earth Science > Sun-Earth Interactions > Ionosphere/Magnetosphere Dynamics > Geomagnetic Indices
  • Earth Science > Sun-Earth Interactions > Solar Activity > Sunspots
  • Global
Use Constraints
  • Use Constraints: None
Access Constraints
  • Access Constraints: No Constraints
  • Data is free online
Lineage Statement Lineage statement not available.
Processing Steps
  • The NOAA National Centers for Environmental Information (formerly National Geophysical Data Center) adds the adjusted 10.7 cm flux to the Indices provided to complete the dataset.

Metadata Last Modified: 2015-09-18

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