Provisional sunspot numbers April 2010 +------+----------------+-------------------+-------+--------------+ | | | | | | | Day | Groups | Wolf number | Beck | No. of Obs. | | | | | index | | | | N S Total | N S Total | | N/S T Beck | | | | | | | +------+----------------+-------------------+-------+--------------+ | 01. | 0.8 0.8 1.5 | 10 10 20 | 258 | 6 13 5 | | 02. | 0.8 0.8 1.7 | 11 12 23 | 351 | 11 27 10 | | 03. | 0.8 0.9 1.6 | 10 12 22 | 340 | 10 19 7 | | 04. | 1.3 0.7 2.0 | 17 9 26 | 343 | 8 17 6 | | 05. | 1.3 0.6 1.9 | 17 8 25 | 137 | 6 18 5 | | 06. | 1.7 0.2 1.9 | 24 2 26 | 195 | 11 25 10 | | 07. | 1.8 0.0 1.8 | 22 0 22 | 151 | 12 25 12 | | 08. | 1.4 0.0 1.4 | 16 0 16 | 48 | 10 20 8 | | 09. | 0.8 0.0 0.8 | 9 0 9 | 57 | 9 20 9 | | 10. | 0.5 0.0 0.5 | 6 0 6 | 24 | 9 22 9 | | 11. | 0.2 0.0 0.2 | 2 0 2 | 0 | 5 14 5 | | 12. | 0.0 1.0 1.0 | 0 13 13 | 31 | 8 18 6 | | 13. | 0.0 0.5 0.5 | 0 6 6 | 6 | 7 18 5 | | 14. | 0.0 0.0 0.0 | 0 0 0 | 0 | 4 14 5 | | 15. | 0.0 0.0 0.0 | 0 0 0 | 0 | 7 16 5 | | 16. | 0.0 0.0 0.0 | 0 0 0 | 0 | 9 19 7 | | 17. | 0.0 0.0 0.0 | 0 0 0 | 0 | 11 23 9 | | 18. | 0.0 0.0 0.0 | 0 0 0 | 0 | 11 24 9 | | 19. | 0.0 0.0 0.0 | 0 0 0 | 0 | 8 22 8 | | 20. | 0.0 0.0 0.0 | 0 0 0 | 0 | 5 16 4 | | 21. | 0.2 0.0 0.2 | 3 0 3 | 1 | 9 20 7 | | 22. | 0.3 0.0 0.3 | 3 0 3 | 3 | 9 21 9 | | 23. | 0.0 0.0 0.0 | 0 0 0 | 0 | 9 22 7 | | 24. | 0.0 0.0 0.0 | 0 0 0 | 0 | 8 22 9 | | 25. | 0.3 0.0 0.3 | 4 0 4 | 7 | 11 26 10 | | 26. | 0.0 0.0 0.0 | 0 0 0 | 0 | 9 18 5 | | 27. | 0.1 0.0 0.1 | 1 0 1 | 0 | 6 18 5 | | 28. | 0.5 0.0 0.5 | 5 0 5 | 10 | 10 25 11 | | 29. | 0.1 0.0 0.1 | 1 0 1 | 0 | 9 24 9 | | 30. | 0.5 0.0 0.5 | 5 0 5 | 13 | 9 19 6 | +------+----------------+-------------------+-------+--------------+ | Mean | 0.4 0.2 0.6 | 5.5 2.4 7.9 | 66 | 9 20 7 | +------+----------------+-------------------+-------+--------------+ | Days | 30 30 30 | 30 30 30 | 30 | | +------+----------------+-------------------+-------+--------------+ Based on 605 observations of 32 stations. Araujo,G. L 80 910 29 Kaczmarek,A. L 80 400 10 Barnes,H. L 76 910 11 Kandilli Obs. L2003070 28 Battaiola,R. S 901250 6 Michalovce Obs. L1502250 10 Beltran,G.V. S2001600 28 Moeller,M. L 791000 25 Bruegger,S. L 80 400 25 Morales,G. S 902000 29 Bulling,A. S 701000 1 Rim. Sobota Obs.L1502250 22 Bullon,J.M. L1021500 3 Robeck,G. S2032000 23 Bullon,J.M. L1201000 18 Ruemmler,F. L 801200 24 Chudy,M. L 60 700 22 Schott,G.-L. L 80 910 27 Dubois,F. L1252500 30 Schroeder,G. L 751200 25 Fritsche,S. L 63 840 23 Smit,F. L 801200 6 Hesse,A. L1001000 20 Suzuki,M. L100 0 22 Hoerenz,M. L 60 700 17 Tiendesprong ObsL 751200 22 Hurbanovo Obs. L1502250 24 Van Slooten,B. L 901300 30 Joppich,H. L 60 900 6 WFS,Berlin L1502250 11 Junker,E. L 50 600 17 Willi,X. S2001320 11