Provisional sunspot numbers April 2004 +------+----------------+-------------------+-------+--------------+ | | | | | | | Day | Groups | Wolf number | Beck | No. of Obs. | | | | | index | | | | N S Total | N S Total | | N/S T Beck | | | | | | | +------+----------------+-------------------+-------+--------------+ | 01. | 0.9 2.0 2.9 | 22 31 53 | 779 | 8 14 6 | | 02. | 0.9 2.4 3.3 | 15 37 53 | 455 | 7 19 9 | | 03. | 0.7 2.4 3.1 | 9 36 45 | 400 | 5 10 4 | | 04. | 1.3 2.4 3.7 | 15 42 57 | 650 | 5 10 4 | | 05. | 1.4 2.2 3.6 | 17 38 55 | 502 | 5 14 6 | | 06. | 0.7 1.7 2.4 | 9 31 40 | 358 | 3 11 5 | | 07. | 0.4 2.1 2.5 | 4 33 37 | 321 | 1 8 3 | | 08. | - - 1.3 | - - 21 | 252 | 0 9 4 | | 09. | - - 1.0 | - - 16 | 114 | 0 11 3 | | 10. | - - 0.9 | - - 13 | 19 | 0 6 1 | | 11. | - - 1.0 | - - 15 | 40 | 0 10 3 | | 12. | - - 1.8 | - - 23 | 58 | 0 10 3 | | 13. | - - 2.5 | - - 36 | 143 | 0 10 4 | | 14. | 0.7 2.1 2.7 | 8 33 41 | 368 | 6 19 8 | | 15. | 0.8 1.6 2.4 | 9 25 33 | 229 | 8 17 9 | | 16. | 0.9 1.8 2.7 | 10 24 34 | 152 | 7 17 8 | | 17. | 0.7 2.9 3.6 | 10 38 48 | 303 | 3 13 4 | | 18. | 0.9 2.9 3.8 | 10 47 58 | 354 | 5 15 6 | | 19. | 0.8 2.7 3.5 | 8 53 61 | 680 | 5 9 5 | | 20. | 0.7 2.5 3.2 | 8 48 56 | 507 | 5 18 7 | | 21. | - - 3.3 | - - 57 | 653 | 0 17 11 | | 22. | - - 3.3 | - - 57 | 609 | 0 14 7 | | 23. | - - 2.3 | - - 39 | 305 | 0 14 4 | | 24. | 0.9 1.4 2.3 | 14 22 36 | 438 | 3 12 3 | | 25. | 0.9 0.8 1.7 | 19 11 30 | 393 | 5 17 6 | | 26. | 1.5 0.7 2.1 | 25 9 33 | 310 | 6 15 6 | | 27. | 0.9 0.8 1.6 | 15 10 26 | 224 | 7 16 8 | | 28. | 1.0 0.8 1.9 | 16 11 26 | 233 | 6 15 8 | | 29. | 0.8 1.0 1.7 | 11 11 22 | 126 | 6 15 6 | | 30. | 0.7 1.5 2.2 | 9 26 36 | 297 | 9 19 9 | +------+----------------+-------------------+-------+--------------+ | Mean | 0.9 1.8 2.5 | 12.6 29.3 38.6 | 342 | 5 13 6 | +------+----------------+-------------------+-------+--------------+ | Days | 21 21 30 | 21 21 30 | 30 | | +------+----------------+-------------------+-------+--------------+ Based on 404 observations of 27 stations. Barnes,H. L 76 910 11 Keller,H.U. L 40 480 5 Battaiola,R. S 901250 10 Michalovce Obs. L1502250 17 Beltran,G.V. S2001600 16 Morales,G. S 902000 26 Capricornio Obs.L1502250 10 Rim. Sobota Obs.L1502250 24 Fritsche,S. L 63 840 20 Schott,G.-L. S2032032 27 Gahsche,C.-D. L 751200 21 Schulze,W. L 63 840 11 Goetz,M. S1001000 23 Strickling,W. S1501200 3 Hannig,R. L114 600 1 Van Heek,K.H. S1001000 11 Hickmann,R. L 60 700 16 Van Slooten,B. L 901300 30 Hoerenz,M. L 60 700 17 Vstw. Wertheim L1551400 18 Hofmann,W. L 80 400 18 WFS,Berlin L1502250 12 Hurbanovo Obs. L1502250 21 Willi,X. S2001320 5 Joppich,H. L 60 900 7 Wolf,T. L 60 700 3 Kandilli Obs. L2003070 21