DAILY SUNSPOT NUMBERS 1820 =============================================================================== Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Yr Day ------------------------------------------------------------------------------- 17 19 0 0 31 15 18 0 0 1820 01 19 0 0 20 17 16 0 0 1820 02 0 0 0 15 15 0 0 1820 03 0 0 0 0 15 0 0 1820 04 0 0 0 15 0 15 0 0 0 1820 05 0 0 15 0 0 0 0 1820 06 0 0 31 15 0 0 0 0 32 1820 07 0 0 31 0 0 0 1820 08 0 43 0 15 40 0 0 0 21 1820 09 38 0 36 0 0 0 1820 10 0 15 36 0 0 0 0 39 1820 11 0 58 0 0 15 1820 12 15 29 0 56 0 0 15 1820 13 33 0 38 60 0 20 0 15 21 1820 14 29 32 0 60 42 0 38 0 15 23 1820 15 50 16 40 19 0 19 16 30 1820 16 29 17 35 23 0 43 32 15 1820 17 15 46 29 20 15 24 17 1820 18 29 16 15 17 27 16 39 1820 19 15 24 15 16 15 23 16 36 0 1820 20 15 15 17 40 0 1820 21 15 15 15 16 59 23 40 0 1820 22 49 25 15 0 1820 23 46 27 0 1820 24 53 31 23 0 0 0 1820 25 22 32 38 0 0 0 1820 26 39 20 44 31 0 0 19 0 1820 27 16 0 36 15 0 0 17 0 1820 28 33 0 0 20 15 0 0 16 0 1820 29 0 35 15 39 0 0 1820 30 32 0 32 16 0 0 1820 31 ------------------------------------------------------------------------------- 19.2 26.6 4.5 19.4 29.3 10.8 20.6 25.9 5.2 8.9 7.9 9.1 Mean ------------------------------------------------------------------------------- Yearly Mean = 15.6