sunspot number

sunspot number

[′sən‚spät ‚nəm·bər]
References in periodicals archive ?
But unlike Earth's, the sun's magnetic poles flip every 11 years or so, just as the sunspot number is peaking.
The citation of the Sunspot award reads: "For a cumulative contribution since 1999 of 1 500 sunspot observations in support of the American Relative Sunspot Number program and service to the AAVSO Solar observing program.
This cycle peaked in 1957 with a yearly sunspot number of 190, just at the time that the first space physics satellites were being launched (Odenwald et al.
The sunspot number represents solar activity on the sun itself, but the number does not report whether the earth is affected by solar activity.
There was a slight upturn in solar activity in both hemispheres during August with the relative sunspot number (R) around the average for the year so far.
It turns out, however, that these changes in irradiance correlate closely with the sunspot number, which astronomers have been measuring for hundreds of years.
65 (36) g = active areas (AAs) MDF = mean daily frequency R = relative sunspot number The no.
The sunspot number for May was the highest recorded since 2011 November and the first time the southern hemisphere has been more active than the north since 2012 October.
29 NATIRE, Todor Stanev of the University of Delaware in Newark and his colleagues describe a "strong" correlation between the neutrino detection rate and the monthly sunspot number.
33 (37) g = active areas (AAs) MDF = mean daily frequency R = relative sunspot number The no.
The sun apparently changes its tune in time with the rise and fall in sunspot number and magnetic activity marking the solar cycle.
Solar activity in January increased and the relative sunspot number recorded was the highest since 2011 December.