Solar Mean Magnetic Field Data (All ftp)

Sun-As-A-Star measurements of the solar magnetic field are summed over the solar disk (the net magnetic field intensity in microTeslas). V.A. Kotov of the Crimean Astrophysical Observatory provides the data from 19 March 1968 through 13 October 1976; P.H. Scherrer of the Stanford Solar Observatory provides values from 16 May 1975 to the present.

Several observations are made daily, centered around local noon. Each value reported is a weighted average of all measurements for that day. The weighting arises from effects that include solar rotation, limb darkening, and weakening of the sensitive absorption line within active regions. For a complete explanation of the program, see P.H. Scherrer, The Mean Magnetic Field of the Sun: Observations at Stanford, SOLAR PHYSICS, Vol. 54, pp. 353-361 (1977).

• Description of the data (text)
  • Daily values in microTeslas in annual tables
    • 1968 1969
    • 1970 1971 1972 1973 1974 1975 1976
• Daily values in one x-y plot file
  • X-Y Plot File 1968-1976
  
  

• Description of the data (text)
  • Daily values in microTeslas in annual files
    • 1975 1976 1977 1978 1979
    • 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989
    • 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999
    • 2000 2001 2002 2003 2004 2005 2006 2007 2008
  • Daily values in one x-y plot file
    • X-Y Plot File 1975-present
    
    

• E-mail message from Dr. Karen Harvey -- information from her Ph.D. thesis work