Solar Sunspot Regions . Since July 1st 2015, the original Sunspot number data have been replaced by a new entirely revised data series. About us : home: about: gallery: data/archive: operations: publications The official daily and monthly sunspot numbers are determined by the World Data Center – Sunspot Index and Long-term Solar Observations (WDC-SILSO (link is external)) at the Royal Observatory of Belgium. Brussels International Sunspot Number, Data Files. The derived data (daily_area.txt, sunspot_area.txt, sunspot_area_north.txt, sunspot_area_south.txt, and bflydata.txt) do include the correction factor of 1.4x after 1976/12/31. download_co2_ml: Mauna Loa Atmospheric CO2 Concentration (Latest Data) download_grapes: Grape Harvest Dates; download_paris_precipitation: Paris Monthly Precipitation 1688-2009; download_sunspots_daily: Daily Sunspot Numbers (Latest Data) grapes: Grape Harvest Dates; import_lynx_1942: Annual Canadian Lynx Trappings 1821-1939 relative sunspot number is defined as R = K (10g + s), where g is the number of sunspot groups and s is the total number of distinct spots. These reports are used to form a composite picture of each individual region, including sunspot number, area and classification, taking into account such factors as the time of observation and the quality of seeing. Predicted values are based on the consensus of the Solar Cycle 25 Prediction Panel The thin blue line indicates the daily sunspot number, while the dark blue line indicates the running annual average. They typically last for several days, although very large ones may live for several weeks. Daily observations of the number of sunspots since 1 January 1900 according to Solar Influences Data Analysis Center (SIDC). The sunspot region information used to compute the daily sunspot number incorporates reports from as many as six observatories. Penticton, B.C., Canada: 10.7cm radio flux values (sfu), Data Files. On this occasion, the data are presented in a new array of files, containing additional values that were not present in the original series. This data comes from the NOAA SWPC and is updated daily. In both plots, the black line represents the monthly averaged data and the purple line represents a 13-month weighted, smoothed version of the monthly averaged data. The scale factor K (usually less than unity) depends on the observer and is intended to effect the conversion to the scale originated by Wolf. Sunspots appear as dark spots on the surface of the Sun. For many years solar observatories have been tracking sunspot regions as they move across the solar disk. To download a data file, click on one of the title Predicted Solar Cycle: Sunspot Number And Radio Flux Values with Expected Ranges. The observed and predicted Solar Cycle solar cycle is depicted in Sunspot Number in the top graph and observed and predicted F10.7cm Radio Flux in the bottom graph. Predicted Solar Cycle Data (JSON) Sources. For proper tracking of those changes, the present version is numbered 2.0. Daily sunspot number (yellow), monthly mean sunspot number (blue), smoothed monthly sunspot number (red) for the last 13 years and 12-month ahead predictions of the monthly smoothed sunspot number: SC (red dots) : prediction method based on an interpolation of Waldmeier's standard curves; It is only based on the sunspot number series. The graph below shows you the number of C, M and X-class solar flares that were produced during past month together with the sunspot number of each day. 30 March 2021 - Mission Day: 9251 - DOY: 089. S.I.D.C. This gives you an idea of the solar activity during the past month. Name Last modified Size; Parent Directory - aavso-arssn_1944.txt: 2012-09-12 17:41 : 2.9K: aavso-arssn_1945.txt After 1976/12/31 several days, although daily sunspot number data large ones may live for weeks!: operations: publications solar sunspot Regions as they move across the solar disk the present version is 2.0... 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