Provisional sunspot numbers December 1999 +------+----------------+-------------------+-------+--------------+ | | | | | | | Day | Groups | Wolf number | Beck | No. of Obs. | | | | | index | | | | N S Total | N S Total | | N/S T Beck | | | | | | | +------+----------------+-------------------+-------+--------------+ | 1. | 2.1 2.4 4.5 | 37 41 78 | 1126 | 3 6 2 | | 2. | 3.1 1.3 4.4 | 47 20 67 | 506 | 5 8 3 | | 3. | 3.0 0.7 3.7 | 36 11 48 | 388 | 3 4 3 | | 4. | 2.7 0.8 3.4 | 40 11 51 | 581 | 5 12 3 | | 5. | 2.3 0.8 3.0 | 37 10 47 | 712 | 6 16 6 | | 6. | 3.4 0.8 4.2 | 54 9 62 | 598 | 4 6 3 | | 7. | 2.4 1.0 3.4 | 44 11 56 | 771 | 4 7 4 | | 8. | 3.4 1.6 5.0 | 54 19 72 | 669 | 6 15 6 | | 9. | 3.8 2.2 6.0 | 58 26 84 | 456 | 4 8 3 | | 10. | 4.3 2.5 6.7 | 66 34 101 | 788 | 4 9 3 | | 11. | 4.2 2.3 6.5 | 64 32 96 | 440 | 4 9 2 | | 12. | 3.4 2.0 5.4 | 49 24 73 | 181 | 1 5 1 | | 13. | 2.5 3.7 6.1 | 35 50 84 | 533 | 5 12 3 | | 14. | 2.4 3.9 6.2 | 29 57 87 | 527 | 4 7 3 | | 15. | 1.1 3.2 4.3 | 13 62 75 | 1501 | 2 5 1 | | 16. | 0.9 3.2 4.0 | 9 65 74 | 998 | 3 7 3 | | 17. | 1.6 2.3 3.9 | 17 65 82 | 1521 | 4 7 3 | | 18. | 1.9 2.4 4.4 | 29 62 91 | 2748 | 6 12 2 | | 19. | 1.6 2.0 3.6 | 34 50 84 | 2155 | 5 17 6 | | 20. | 1.8 2.3 4.1 | 36 49 85 | 1582 | 3 10 2 | | 21. | 1.5 1.7 3.2 | 38 43 81 | 2364 | 4 9 5 | | 22. | 1.8 2.1 3.8 | 51 46 96 | 2609 | 6 18 8 | | 23. | 1.5 2.2 3.8 | 41 34 75 | 1234 | 4 6 3 | | 24. | 2.9 1.8 4.7 | 59 26 84 | 1178 | 4 8 2 | | 25. | 2.6 1.8 4.3 | 53 23 76 | 1353 | 5 12 4 | | 26. | 2.1 0.7 2.8 | 45 8 53 | 662 | 1 4 1 | | 27. | 2.7 0.8 3.5 | 58 9 67 | 951 | 5 8 3 | | 28. | 2.5 1.3 3.7 | 45 13 59 | 891 | 2 3 2 | | 29. | 2.3 2.6 4.9 | 38 30 68 | 781 | 3 4 4 | | 30. | 1.8 0.9 2.8 | 34 12 47 | 408 | 3 7 2 | | 31. | 2.3 1.2 3.5 | 35 17 52 | 450 | 2 3 3 | +------+----------------+-------------------+-------+--------------+ | Mean | 2.4 1.9 4.3 | 41.5 31.3 72.7 | 1021 | 4 9 3 | +------+----------------+-------------------+-------+--------------+ | Days | 31 31 31 | 31 31 31 | 31 | | +------+----------------+-------------------+-------+--------------+ Based on 264 observations of 27 stations. Edited by Martin Dillig