Monthly Ri_hemispheric Report

:Issued: 2012 May 01 1100 UTC
:Product: documentation at http://www.sidc.be/products/ri_hemispheric
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# MONTHLY REPORT ON THE INTERNATIONAL SUNSPOT NUMBER                 #
# from the SIDC (RWC-Belgium)                                        #
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                                     APRIL 2012


        PROVISIONAL INTERNATIONAL NORMALIZED HEMISPHERIC SUNSPOT NUMBERS


               Date             Ri              Rn              Rs
       __________________________________________________________________

                 1              42              19              23
                 2              51              24              27
                 3              46              26              20
                 4              41              27              14
                 5              34              34               0
                 6              34              34               0
                 7              19              19               0
                 8              16              16               0
                 9               9               9               0
                10              10              10               0
                11              19              11               8
                12              37              16              21
                13              35              27               8
                14              33              33               0
                15              58              37              21
                16              39              23              16
                17              51              32              19
                18              72              26              46
                19              95              35              60
                20             108              35              73
                21             104              31              73
                22              94              31              63
                23              89              28              61
                24              86              38              48
                25              81              41              40
                26              75              35              40
                27              68              36              32
                28              72              30              42
                29              71              21              50
                30              67              15              52
       __________________________________________________________________

       MONTHLY MEAN :          55.2            26.6            28.6

       COOPERATING STATIONS :   70              65              65

                 PILOT STATION : Specola Solare Ticinese, Locarno

       __________________________________________________________________

                   Reproduction permitted if source mentionned
                                Frederic Clette
                  3, avenue Circulaire, B-1180 Bruxelles, Belgium
 
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