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INDICES of SOLAR ACTIVITY

ZURICH AND INTERNATIONAL SUNSPOT NUMBERS:

Daily means (1818 to present), monthly, and smoothed monthly means (1749 to present), and yearly means (1700 to present); includes American sunspot numbers in separate subdirectory (1944 to present).

  1. Single diskette
  2. Publication, Report UAG-95, 112 pages
  3. Annual subscription to monthly Solar Indices Bulletin, 2 pages

SUNSPOT REGION HISTORIES:

Compressed monthly or yearly files.

  1. Sunspot groups, Rome; (Jan 1958 - Jun 1989); 1 diskette
  2. Sunspot groups, Catania; (Jan 1978 - Dec 1987); 1 diskette
  3. Sunspot groups, Mt. Wilson (Jan 1962 - present); 1 diskette
  4. Sunspot groups, Greenwich (May 1874 - Dec 1981); 4 diskettes
  5. Sunspot groups, U.S. Air Force; (Dec 1981 - present); 3 diskettes
  6. Sunspot daily total area; Greenwich (Jan 1874 - Dec 1982); 1 diskette

REGIONS OF SOLAR ACTIVITY:

Daily evolution and development of active centers; compressed yearly files; each on 2 diskettes.

  1. Plage regions [McMath, Hale, Big Bear (Jun 1942 - Oct 1987)]
  2. Plage regions and sunspot groups (Jan 1969 - Aug 1982)

OTTAWA 10.7 cm (2800 MHz) SOLAR FLUX:

Observed, adjusted, and absolute daily values, monthly means, and yearly means (Feb 1947 - present).

  1. Single diskette; compressed files
  2. Annual subscription to monthly Solar Indices Bulletin, 2 pages

STANFORD MEAN SOLAR MAGNETIC FIELD:

Net solar magnetic field summed over the disk; sun-as-a-star measurement (May 1975 - present); includes Crimea values (Mar 1968 - Oct 1976); 1 diskette

SOLAR IRRADIANCE:

Daily measurements (by NIMBUS and SMM and by ERBS and NOAA 9 and 10 satellites) of the total energy emitted by the sun over all wavelengths (Nov 1978 - present); 1 diskette.

CORONAL INDEX OF SOLAR ACTIVITY:

Daily full-disk Fe XIV emission at 530.3 nm; (Jan 1964 - Dec 1989); 1 diskette.

SOLAR RADIO NOISE BURSTS:

Time, frequency, type, peak flux density

  1. Fixed frequency; (Jan 1960 - present); compressed files; 9 diskettes
  2. Sweep frequency; (Jan 1967 - present); compressed files; 2 diskettes

SOLAR FLARE REPORTS:

Importance, area, time, position, active region

  1. Grouped records; compressed; (Jan 1975 - present); 4 diskettes
  2. Records not grouped; compressed; (Apr 1938 - present); 6 diskettes
  3. X-ray flares Solrad (1968 - 1974); GOES (1975 - present); diskette
  4. X-ray hourly background flux Solrad (Mar 1968 - Feb 1974); diskette

GEOMAGNETIC INDICES:

  1. Kp, Kp-sum, ap, Ap, Cp, C9, Rz (Jan 1932 to present); adjusted solar flux (Feb 1947 to present); compressed yearly files; 1 diskette
  2. Annual subscription to monthly Geomagnetic Indices Bulletin. Bulletin contains daily Kp, Kp-sum, Ap, Cp, ssc, AFr, An, As, Am, aa.
  3. Equatorial Dst (1957 - 1990 final; 1991- present preliminary); diskette
  4. Worldwide aa indices, 3-hourly (1868 - present); diskette
  5. Indices aa daily and IMF directions (1974 - present); diskette
  6. IMF sector boundary crossings (Jan 1947 - Jul 1978); diskette
  7. Hourly AE and components (1957 - Jul 1987); 2 diskettes
  8. 2.5-min AE and components (1966 - 1974); 2 magnetic tapes
  9. 1.0-min AE and components (1975, 1978 - Jul 1987)- call for more information.

PARTICLES AND FIELDS AT GEOSTATIONARY ALTITUDE:

Continuous 3-second samples with three kinds of sensors on the SMS / GOES Satellites (July 1974 to present). Magnetometers measure 3 components of the earth's magnetic field; x-ray telescopes monitor whole-sun fluxes in the bands 0.5 to 4 and 1 to 8 Angstroms; and particle detectors count protons between 0.8 and 500 MeV, electrons above 2 MeV, and alpha particles from 4 to 392 MeV.

  1. Magnetic tape; binary (one tape per sensor per month)
  2. Magnetic tape; ASCII code (one tape per sensor per month)
  3. Diskette; 5-min averages for 1 month (or up to 12 months)

Display software; requires EGA or VGA graphics adapter, also available from NGDC.

To order or find out more information on any of these products, please click here.

Magnetic tapes are written on 9 tracks, at either 1600 or 6250 bpi, and coded in either ASCII or EBCDIC. When ordering please specify density and code. Diskettes are either 3.5 or 5.25-inch, high-density (for most products), and for use on any personal computer compatible with an XT or AT machine. All files contain standard ASCII characters, which can be modified with any text editor. And for files that have been compressed, we provide an extraction utility.

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