Provisional sunspot numbers May 1997 +------+----------------+-------------------+-------+--------------+ | | | | | | | Day | Groups | Wolf number | Beck | No. of Obs. | | | | | index | | | | N S Total | N S Total | | N/S T Beck | | | | | | | +------+----------------+-------------------+-------+--------------+ | 1. | 0.0 0.0 0.0 | 0 0 0 | 0 | 8 14 7 | | 2. | 0.0 0.0 0.0 | 0 0 0 | 0 | 9 15 8 | | 3. | 0.0 0.0 0.0 | 0 0 0 | 0 | 6 13 7 | | 4. | 0.0 0.1 0.1 | 0 1 1 | 1 | 6 11 4 | | 5. | 0.4 0.0 0.4 | 4 0 4 | 28 | 3 5 2 | | 6. | 0.8 0.0 0.8 | 8 0 8 | 49 | 3 5 2 | | 7. | 0.8 0.1 0.9 | 9 1 10 | 62 | 6 11 3 | | 8. | 0.8 0.0 0.8 | 9 0 9 | 59 | 7 11 4 | | 9. | 0.8 0.0 0.8 | 9 0 9 | 70 | 4 8 2 | | 10. | 1.1 0.0 1.1 | 13 0 13 | 141 | 6 12 5 | | 11. | 1.0 0.0 1.0 | 12 0 12 | 118 | 6 7 3 | | 12. | 0.8 0.0 0.8 | 10 0 10 | 125 | 6 10 3 | | 13. | 0.8 0.0 0.8 | 13 0 13 | 119 | 6 11 6 | | 14. | 0.8 0.0 0.8 | 14 0 14 | 129 | 7 12 6 | | 15. | 0.9 0.0 0.9 | 12 0 12 | 58 | 4 9 6 | | 16. | 1.0 0.0 1.0 | 12 0 12 | 34 | 6 12 6 | | 17. | 0.8 0.0 0.8 | 10 0 10 | 18 | 7 12 6 | | 18. | 1.1 0.0 1.1 | 20 0 20 | 178 | 6 11 4 | | 19. | 1.2 0.0 1.2 | 24 0 24 | 297 | 6 11 6 | | 20. | 1.4 0.5 1.9 | 28 6 34 | 223 | 5 7 4 | | 21. | 1.7 0.7 2.4 | 42 8 50 | 906 | 5 8 3 | | 22. | 2.0 0.7 2.7 | 41 7 48 | 630 | 3 4 3 | | 23. | 1.4 1.3 2.7 | 23 14 38 | 280 | 5 9 6 | | 24. | 0.7 1.5 2.2 | 11 18 29 | 119 | 8 15 8 | | 25. | 0.9 1.4 2.3 | 11 18 29 | 114 | 9 14 6 | | 26. | 1.9 0.9 2.8 | 23 11 34 | 123 | 5 9 3 | | 27. | 1.3 0.6 1.9 | 15 8 23 | 36 | 2 3 2 | | 28. | 0.7 0.4 1.1 | 10 5 15 | 70 | 7 12 6 | | 29. | 0.5 0.3 0.8 | 9 4 13 | 59 | 3 8 4 | | 30. | 0.7 0.5 1.2 | 10 6 15 | 37 | 6 13 7 | | 31. | 0.7 0.5 1.1 | 9 6 15 | 41 | 7 12 7 | +------+----------------+-------------------+-------+--------------+ | Mean | 0.9 0.3 1.2 | 13.3 3.6 16.9 | 133 | 6 10 5 | +------+----------------+-------------------+-------+--------------+ | Days | 31 31 31 | 31 31 31 | 31 | | +------+----------------+-------------------+-------+--------------+ Based on 314 observations of 17 stations. Edited by Martin Dillig