Provisional sunspot numbers May 1998 +------+----------------+-------------------+-------+--------------+ | | | | | | | Day | Groups | Wolf number | Beck | No. of Obs. | | | | | index | | | | N S Total | N S Total | | N/S T Beck | | | | | | | +------+----------------+-------------------+-------+--------------+ | 1. | 0.7 1.5 2.2 | 22 31 53 | 691 | 4 7 2 | | 2. | 0.7 1.9 2.6 | 28 38 66 | 1354 | 5 8 2 | | 3. | 0.6 1.9 2.5 | 31 30 61 | 521 | 3 5 1 | | 4. | 0.9 1.8 2.7 | 36 26 62 | 504 | 3 7 1 | | 5. | 0.9 1.7 2.6 | 44 26 70 | 1649 | 3 7 2 | | 6. | 0.7 2.2 2.9 | 27 28 55 | 1008 | 3 6 2 | | 7. | 1.0 2.1 3.1 | 28 31 60 | 1149 | 3 5 2 | | 8. | 0.9 1.8 2.7 | 22 29 51 | 827 | 4 8 4 | | 9. | 0.8 1.6 2.4 | 16 30 46 | 834 | 7 11 3 | | 10. | 0.4 1.8 2.3 | 5 35 40 | 720 | 6 12 4 | | 11. | 0.5 2.7 3.2 | 6 43 48 | 532 | 6 11 4 | | 12. | 0.8 2.5 3.3 | 12 47 59 | 691 | 5 11 4 | | 13. | 0.9 2.5 3.4 | 17 50 66 | 810 | 6 12 4 | | 14. | 1.2 2.3 3.6 | 28 47 75 | 1117 | 4 9 3 | | 15. | 0.9 1.7 2.7 | 24 46 70 | 1083 | 4 10 3 | | 16. | 1.1 1.7 2.8 | 26 46 72 | 736 | 5 9 2 | | 17. | 1.0 1.8 2.8 | 24 42 66 | 813 | 6 10 3 | | 18. | 0.9 1.6 2.5 | 25 35 60 | 862 | 5 11 3 | | 19. | 1.1 2.5 3.6 | 23 33 56 | 391 | 7 13 4 | | 20. | 0.9 1.2 2.1 | 17 14 31 | 200 | 7 11 3 | | 21. | 0.8 0.7 1.5 | 13 7 20 | 166 | 3 5 1 | | 22. | 0.8 0.0 0.8 | 12 0 12 | 138 | 2 4 1 | | 23. | 1.1 0.6 1.7 | 18 6 24 | 44 | 2 5 1 | | 24. | 0.8 0.8 1.7 | 21 11 32 | 448 | 1 3 1 | | 25. | 1.2 0.7 2.0 | 27 8 35 | 532 | 5 8 1 | | 26. | 1.6 0.8 2.5 | 31 8 39 | 400 | 4 7 3 | | 27. | 1.4 1.1 2.5 | 27 13 40 | 361 | 7 11 2 | | 28. | 1.5 0.4 1.9 | 25 5 30 | 258 | 5 8 1 | | 29. | 0.6 0.7 1.4 | 13 9 22 | 132 | 2 6 1 | | 30. | 0.6 1.6 2.2 | 11 22 33 | 233 | 5 7 2 | | 31. | 0.6 1.8 2.4 | 12 29 42 | 341 | 5 8 2 | +------+----------------+-------------------+-------+--------------+ | Mean | 0.9 1.5 2.5 | 21.6 26.6 48.3 | 630 | 4 8 2 | +------+----------------+-------------------+-------+--------------+ | Days | 31 31 31 | 31 31 31 | 31 | | +------+----------------+-------------------+-------+--------------+ Based on 255 observations of 13 stations. Edited by Martin Dillig