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Geomagnetic Observatory 2.5 Minute Data

Data provided by  National Oceanic and Atmospheric Administration

Geomagnetic variation data with 2.5 minute resolution

Modified:

Source: https://www.ncei.noaa.gov/metadata/geoportal//rest/metadata/item/gov.noaa.ngdc.stp.geomag%3AG10121

Geomagnetic Observatory 10 Second Data

Data provided by  National Oceanic and Atmospheric Administration

Geomagnetic 10 second data provides high temporal resolution of geomagnetic variations

Modified:

Source: https://www.ncei.noaa.gov/metadata/geoportal//rest/metadata/item/gov.noaa.ngdc.stp.geomag%3AG10122

Boulder Magnetic Observatory

Data provided by  National Oceanic and Atmospheric Administration

These data are vector and scalar component values of the Earth's magnetic field for 2004 recorded at the Boulder Magnetic Observatory in Colorado. Vector values are measured using 3 mutually orthogonal fluxgate magnetometer sensors. The scalar value of the total magnetic field is recorded with a proton precession magnetometer. All values are calibrated with measurements of the absolute value of the geomagnetic field using a DI-Flux magnetometer. The data are

Modified:

Source: https://www.ncei.noaa.gov/metadata/geoportal//rest/metadata/item/gov.noaa.ngdc.stp.geomag%3AG10130

Magnetometer Data recovered from 35mm film

Data provided by  National Oceanic and Atmospheric Administration

The L57 CDMP recovery project takes magnetometer data on 35mm film stored at the archive's climate controlled warehouse and digitizes them.

Modified:

Source: https://www.ncei.noaa.gov/metadata/geoportal//rest/metadata/item/gov.noaa.ngdc.stp.geomag%3AG10160

Intermagnet definitive observatory data

Data provided by  National Oceanic and Atmospheric Administration

1 minute and hourly values reported as definitive from Intermagnet observatories.

Modified:

Source: https://www.ncei.noaa.gov/metadata/geoportal//rest/metadata/item/gov.noaa.ngdc.stp.geomag%3AG10161

Digitized Historical Geomagnetic Publications in PDF format

Data provided by  National Oceanic and Atmospheric Administration

A catalog of 732 historical geomagnetic publications that were at risk of loss have been digitized and converted in pdf documents.

Modified:

Source: https://www.ncei.noaa.gov/metadata/geoportal//rest/metadata/item/gov.noaa.ngdc.stp.geomag%3AG10162

AA Index

Data provided by  National Oceanic and Atmospheric Administration

The geomagnetic aa index provides a long climatology of global geomagnetic activity using 2 antipodal observatories at Greenwich and Melbourne- IAGA Bulletin 37, 1975 p. 128

Modified:

Source: https://www.ncei.noaa.gov/metadata/geoportal//rest/metadata/item/gov.noaa.ngdc.stp.indices%3AAA

AM Index

Data provided by  National Oceanic and Atmospheric Administration

Geomagnetic Range index using data from multiple observatories - Mayaud 1948

Modified:

Source: https://www.ncei.noaa.gov/metadata/geoportal//rest/metadata/item/gov.noaa.ngdc.stp.indices%3AAM

AP Index

Data provided by  National Oceanic and Atmospheric Administration

Planetary Amplitude index - Bartels 1951. The a-index ranges from 0 to 400 and represents a K-value converted to a linear scale in gammas (nanoTeslas)--a scale that measures equivalent disturbance am- plitude of a station at which K=9 has a lower limit of 400 gammas.

Modified:

Source: https://www.ncei.noaa.gov/metadata/geoportal//rest/metadata/item/gov.noaa.ngdc.stp.indices%3AAP

Geomagnetic aa Indices

Data provided by  National Oceanic and Atmospheric Administration

The geomagnetic aa indices are the continuation of the series beginning in the year 1868. A full description of these indices is given in the International Association of Geomagnetism and Aeronomy (IAGA) Bulletin No 33, which contains them for the years 1868-1967. Descriptions are also given (especially comparisons with am, ap, or Ci indices) in two short papers [Ann. Geoph., 27, 62-70, 1971 and J. Geophys. Res., 77, 6870-6874, 1972]. The aa values form 1968-1975 are contained in the IAGA Bulletin 39. From 1976 onward they are included in IAGA Bulletin 32.

Modified:

Source: https://www.ncei.noaa.gov/metadata/geoportal//rest/metadata/item/gov.noaa.ngdc.stp.indices%3AG00020