Monthly Ri_hemispheric Report

:Issued: 2026 May 01 08:35 UTC
:Product: documentation at http://www.sidc.be/products/ri_hemispheric
#--------------------------------------------------------------------#
# MONTHLY TABLE OF THE TOTAL AND HEMISPHERIC SUNSPOT NUMBERS         #
# from the World Data Center SILSO                                   #
#--------------------------------------------------------------------#


                                     APRIL 2026


        PROVISIONAL INTERNATIONAL NORMALIZED HEMISPHERIC SUNSPOT NUMBERS


               Date             Sn           Sn(N)           Sn(S)
       __________________________________________________________________

                 1             129              95              34
                 2             133              97              36
                 3             120              82              38
                 4             106              80              26
                 5              89              70              19
                 6              97              72              25
                 7              89              69              20
                 8              70              48              22
                 9              59              36              23
                10              28              17              11
                11              39              27              12
                12              38              23              15
                13              53              30              23
                14              53              32              21
                15              49              37              12
                16              50              39              11
                17              48              37              11
                18              41              30              11
                19              36              25              11
                20              37              26              11
                21              50              39              11
                22              71              56              15
                23              68              54              14
                24              94              64              30
                25             114              79              35
                26             115              75              40
                27             117              81              36
                28             128              81              47
                29             123              78              45
                30             135              80              55
       __________________________________________________________________

       MONTHLY MEAN :          79.3            55.3            24.0

       COOPERATING STATIONS :   68              59              59

                 PILOT STATION : Specola Solare Ticinese, Locarno

       __________________________________________________________________

                   Reproduction permitted if source mentionned



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