Provisional sunspot numbers April 2009 +------+----------------+-------------------+-------+--------------+ | | | | | | | Day | Groups | Wolf number | Beck | No. of Obs. | | | | | index | | | | N S Total | N S Total | | N/S T Beck | | | | | | | +------+----------------+-------------------+-------+--------------+ | 01. | 0.0 0.0 0.0 | 0 0 0 | 0 | 7 18 6 | | 02. | 0.0 0.0 0.0 | 0 0 0 | 0 | 10 22 8 | | 03. | 0.0 0.0 0.0 | 0 0 0 | 0 | 11 22 8 | | 04. | 0.0 0.0 0.0 | 0 0 0 | 0 | 7 19 8 | | 05. | 0.0 0.0 0.0 | 0 0 0 | 0 | 10 22 10 | | 06. | 0.1 0.0 0.1 | 1 0 1 | 0 | 10 20 8 | | 07. | 0.0 0.0 0.0 | 0 0 0 | 0 | 9 19 9 | | 08. | 0.0 0.0 0.0 | 0 0 0 | 0 | 9 17 7 | | 09. | 0.0 0.0 0.0 | 0 0 0 | 0 | 8 18 9 | | 10. | 0.0 0.0 0.0 | 0 0 0 | 0 | 10 21 9 | | 11. | 0.0 0.0 0.0 | 0 0 0 | 0 | 9 19 7 | | 12. | 0.0 0.0 0.0 | 0 0 0 | 0 | 9 18 7 | | 13. | 0.0 0.0 0.0 | 0 0 0 | 0 | 11 23 10 | | 14. | 0.0 0.0 0.0 | 0 0 0 | 0 | 8 20 9 | | 15. | 0.0 0.0 0.0 | 0 0 0 | 0 | 11 23 9 | | 16. | 0.0 0.0 0.0 | 0 0 0 | 0 | 9 20 7 | | 17. | 0.0 0.0 0.0 | 0 0 0 | 0 | 6 13 5 | | 18. | 0.0 0.0 0.0 | 0 0 0 | 0 | 7 18 8 | | 19. | 0.0 0.0 0.0 | 0 0 0 | 0 | 11 22 9 | | 20. | 0.0 0.0 0.0 | 0 0 0 | 0 | 10 23 9 | | 21. | 0.3 0.0 0.3 | 3 0 3 | 7 | 9 23 9 | | 22. | 0.2 0.0 0.2 | 3 0 3 | 1 | 8 16 6 | | 23. | 0.0 0.0 0.0 | 0 0 0 | 0 | 8 18 6 | | 24. | 0.0 0.0 0.0 | 0 0 0 | 0 | 10 24 8 | | 25. | 0.0 0.0 0.0 | 0 0 0 | 0 | 9 23 8 | | 26. | 0.0 0.0 0.0 | 0 0 0 | 0 | 9 19 8 | | 27. | 0.0 0.0 0.0 | 0 0 0 | 0 | 9 16 5 | | 28. | 0.0 0.2 0.2 | 0 2 2 | 1 | 8 12 4 | | 29. | 0.0 0.2 0.2 | 0 3 3 | 11 | 7 13 4 | | 30. | 0.0 0.4 0.4 | 0 5 5 | 8 | 10 20 9 | +------+----------------+-------------------+-------+--------------+ | Mean | 0.0 0.0 0.1 | 0.2 0.3 0.6 | 1 | 9 19 8 | +------+----------------+-------------------+-------+--------------+ | Days | 30 30 30 | 30 30 30 | 30 | | +------+----------------+-------------------+-------+--------------+ Based on 581 observations of 30 stations. Araujo,G. L 80 910 28 Kaczmarek,A. L 80 400 8 Barnes,H. L 76 910 8 Kandilli Obs. L2003070 24 Battaiola,R. S 901250 5 Lau,D. L 60 700 21 Beltran,G.V. S2001600 21 Michalovce Obs. L1502250 15 Bretschneider,H.L 63 840 24 Moeller,M. L 791000 29 Bruegger,S. L 80 400 23 Morales,G. S 902000 26 Bullon,J.M. L1201000 13 Rim. Sobota Obs.L1502250 29 Bullon,J.M. S2002000 7 Ruemmler,F. L 801200 23 Chudy,M. L 60 700 24 Schott,G.-L. L 80 910 11 Fritsche,S. L 63 840 21 Schroeder,G. L 751200 17 Hesse,A. L1001000 22 Suzuki,M. L100 0 24 Holl,M. L 80 400 25 Tiendesprong ObsL 751200 19 Hurbanovo Obs. L1502250 30 Van Slooten,B. L 901300 30 Joppich,H. L 60 900 7 WFS,Berlin L1502250 17 Junker,E. L 50 600 13 Willi,X. S2001320 17