Provisional sunspot numbers September 1998 +------+----------------+-------------------+-------+--------------+ | | | | | | | Day | Groups | Wolf number | Beck | No. of Obs. | | | | | index | | | | N S Total | N S Total | | N/S T Beck | | | | | | | +------+----------------+-------------------+-------+--------------+ | 1. | 3.3 0.7 4.0 | 60 33 93 | 2649 | 5 7 3 | | 2. | 2.6 1.4 4.0 | 44 43 87 | 2267 | 5 8 3 | | 3. | 3.0 1.0 4.0 | 37 36 73 | 1836 | 6 9 3 | | 4. | 2.5 0.9 3.5 | 29 36 65 | 1555 | 5 6 3 | | 5. | 3.2 1.5 4.7 | 39 46 85 | 1802 | 3 5 2 | | 6. | 3.5 2.4 5.8 | 50 55 105 | 1338 | 2 7 1 | | 7. | 3.9 2.3 6.2 | 62 54 116 | 1962 | 4 8 1 | | 8. | 3.6 2.9 6.5 | 62 51 114 | 834 | 2 6 1 | | 9. | 4.1 2.6 6.6 | 72 46 117 | 1145 | 5 8 2 | | 10. | 3.8 2.0 5.8 | 69 27 96 | 922 | 5 8 1 | | 11. | 3.9 1.4 5.3 | 67 19 86 | 1073 | 3 6 2 | | 12. | 2.9 3.0 5.9 | 53 39 92 | 1057 | 2 4 2 | | 13. | 2.9 2.8 5.7 | 48 37 86 | 985 | 3 5 2 | | 14. | 2.0 2.6 4.6 | 34 33 67 | 780 | 3 6 2 | | 15. | 1.6 2.5 4.1 | 26 27 53 | 467 | 1 1 1 | | 16. | 1.2 2.8 3.9 | 16 36 53 | 321 | 5 9 2 | | 17. | 2.1 2.1 4.2 | 24 29 53 | 342 | 4 6 2 | | 18. | 2.0 2.0 4.0 | 28 31 59 | 701 | 3 5 2 | | 19. | 3.0 2.8 5.8 | 44 48 91 | 752 | 5 10 3 | | 20. | 2.8 3.2 6.0 | 48 62 110 | 1073 | 7 13 5 | | 21. | 3.5 3.2 6.7 | 59 55 114 | 1071 | 5 10 4 | | 22. | 3.1 3.9 7.0 | 63 60 123 | 1196 | 4 9 4 | | 23. | 3.1 3.7 6.8 | 57 54 111 | 1239 | 2 7 2 | | 24. | 3.4 3.7 7.1 | 60 56 116 | 766 | 4 10 3 | | 25. | 2.8 3.0 5.8 | 45 50 95 | 758 | 5 9 3 | | 26. | 2.2 3.2 5.4 | 33 51 84 | 1128 | 2 5 1 | | 27. | 2.3 3.0 5.2 | 31 44 75 | 506 | 2 6 2 | | 28. | 2.1 3.3 5.4 | 27 51 79 | 519 | 3 7 2 | | 29. | 2.4 3.5 5.9 | 27 48 75 | 290 | 4 5 2 | | 30. | 1.1 1.5 2.6 | 12 21 33 | 142 | 2 4 2 | +------+----------------+-------------------+-------+--------------+ | Mean | 2.8 2.5 5.3 | 44.2 42.6 86.9 | 1049 | 4 7 2 | +------+----------------+-------------------+-------+--------------+ | Days | 30 30 30 | 30 30 30 | 30 | | +------+----------------+-------------------+-------+--------------+ Based on 209 observations of 15 stations. Edited by Martin Dillig