Provisional sunspot numbers August 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 | 4 7 3 | | 2. | 0.3 0.2 0.5 | 3 2 5 | 2 | 4 10 5 | | 3. | 0.6 0.4 1.1 | 7 7 15 | 106 | 5 13 3 | | 4. | 0.0 0.8 0.8 | 0 10 10 | 66 | 3 12 4 | | 5. | 0.2 0.9 1.1 | 3 11 13 | 50 | 6 17 6 | | 6. | 0.7 1.3 2.0 | 16 14 30 | 336 | 5 14 5 | | 7. | 0.9 1.8 2.7 | 19 24 44 | 416 | 4 16 7 | | 8. | 1.2 1.2 2.4 | 19 21 39 | 403 | 7 17 7 | | 9. | 1.4 0.7 2.1 | 20 14 34 | 254 | 6 17 7 | | 10. | 0.7 0.7 1.3 | 7 11 18 | 38 | 7 18 6 | | 11. | 1.3 0.6 1.9 | 17 8 25 | 147 | 7 18 5 | | 12. | 2.2 0.9 3.1 | 30 13 43 | 219 | 7 17 5 | | 13. | 2.4 0.9 3.2 | 30 17 47 | 412 | 7 15 4 | | 14. | 2.4 0.6 3.0 | 29 9 38 | 288 | 6 14 4 | | 15. | 2.2 0.3 2.5 | 27 3 31 | 169 | 4 14 4 | | 16. | 1.6 0.1 1.7 | 20 1 21 | 146 | 6 17 6 | | 17. | 1.2 0.1 1.4 | 15 1 16 | 104 | 5 14 3 | | 18. | 0.8 0.1 0.9 | 9 2 11 | 95 | 4 12 4 | | 19. | 0.9 0.2 1.0 | 10 2 11 | 120 | 3 10 2 | | 20. | 0.8 0.0 0.8 | 9 0 9 | 79 | 5 14 3 | | 21. | 0.8 0.0 0.8 | 9 0 9 | 89 | 7 18 5 | | 22. | 0.7 0.0 0.7 | 8 0 8 | 91 | 5 10 2 | | 23. | 0.3 0.0 0.3 | 3 0 3 | 42 | 2 8 2 | | 24. | 0.0 0.0 0.0 | 0 0 0 | 0 | 7 16 4 | | 25. | 0.8 0.4 1.2 | 11 5 15 | 112 | 7 16 5 | | 26. | 0.9 0.4 1.3 | 17 5 22 | 326 | 5 9 2 | | 27. | 1.6 0.2 1.8 | 26 2 28 | 249 | 6 14 5 | | 28. | 1.4 0.0 1.4 | 28 0 28 | 519 | 4 8 2 | | 29. | 1.1 0.0 1.1 | 34 0 34 | 950 | 2 8 2 | | 30. | 2.3 0.0 2.3 | 49 0 49 | 555 | 4 10 3 | | 31. | 2.5 0.0 2.5 | 51 0 51 | 1230 | 4 15 6 | +------+----------------+-------------------+-------+--------------+ | Mean | 1.1 0.4 1.5 | 17.0 5.9 22.8 | 246 | 5 13 4 | +------+----------------+-------------------+-------+--------------+ | Days | 31 31 31 | 31 31 31 | 31 | | +------+----------------+-------------------+-------+--------------+ Based on 418 observations of 22 stations. Edited by Martin Dillig