Provisional sunspot numbers April 2017 +------+----------------+-------------------+-------+--------------+ | | | | | | | Day | Groups | Wolf number | Beck | No. of Obs. | | | | | index | | | | N S Total | N S Total | | N/S T Beck | | | | | | | +------+----------------+-------------------+-------+--------------+ | 01. | 1.1 0.9 2.0 | 16 28 44 | 1243 | 5 13 5 | | 02. | 0.8 1.4 2.2 | 22 34 56 | 1740 | 4 13 6 | | 03. | 1.6 1.6 3.1 | 28 39 67 | 1646 | 7 15 7 | | 04. | 0.9 1.7 2.6 | 12 37 49 | 961 | 7 15 8 | | 05. | 0.4 1.2 1.6 | 6 27 33 | 862 | 3 10 4 | | 06. | 0.2 1.4 1.5 | 3 24 27 | 515 | 4 12 3 | | 07. | 0.0 0.5 0.5 | 0 7 7 | 27 | 3 9 3 | | 08. | 0.0 0.0 0.0 | 0 0 0 | 0 | 2 10 4 | | 09. | 0.0 0.2 0.2 | 0 2 2 | 2 | 3 18 9 | | 10. | 0.8 0.0 0.8 | 9 0 9 | 45 | 5 15 7 | | 11. | 0.8 0.0 0.8 | 10 0 10 | 45 | 3 12 6 | | 12. | 0.9 0.0 0.9 | 11 0 11 | 29 | 4 9 3 | | 13. | 1.2 0.0 1.2 | 15 0 15 | 52 | 4 14 7 | | 14. | 0.9 0.0 0.9 | 11 0 11 | 17 | 2 13 5 | | 15. | 0.1 0.0 0.1 | 1 0 1 | 0 | 3 12 5 | | 16. | 0.0 0.0 0.0 | 0 0 0 | 0 | 3 12 5 | | 17. | 0.1 0.0 0.1 | 1 0 1 | 0 | 2 14 8 | | 18. | 1.0 0.0 1.0 | 13 0 13 | 93 | 4 15 7 | | 19. | 0.8 0.0 0.8 | 11 0 11 | 126 | 3 15 6 | | 20. | 1.4 0.0 1.4 | 19 0 19 | 229 | 3 13 4 | | 21. | 1.4 0.7 2.1 | 20 8 28 | 259 | 4 11 4 | | 22. | 0.8 0.8 1.6 | 13 9 22 | 267 | 1 11 4 | | 23. | 1.2 0.9 2.1 | 18 12 30 | 261 | 3 14 6 | | 24. | 1.5 0.8 2.3 | 24 9 33 | 223 | 6 14 6 | | 25. | 1.8 0.5 2.3 | 24 6 30 | 184 | 3 15 6 | | 26. | 1.2 0.9 2.1 | 16 10 26 | 140 | 3 15 8 | | 27. | 0.8 0.8 1.6 | 10 10 20 | 120 | 3 13 7 | | 28. | 1.0 1.0 2.0 | 13 12 25 | 80 | 1 10 4 | | 29. | 1.2 0.8 2.0 | 14 9 23 | 118 | 3 15 7 | | 30. | 0.8 0.8 1.6 | 9 9 18 | 129 | 5 18 9 | +------+----------------+-------------------+-------+--------------+ | Mean | 0.8 0.6 1.4 | 11.6 9.7 21.4 | 314 | 4 13 6 | +------+----------------+-------------------+-------+--------------+ | Days | 30 30 30 | 30 30 30 | 30 | | +------+----------------+-------------------+-------+--------------+ Based on 395 observations of 24 stations. Araujo,G. L 80 910 29 Hurbanovo Obs. L1502250 24 Barnes,H. L 76 910 12 Joppich,H. L 60 900 3 Battaiola,R. S 901250 7 Junker,E. L 50 600 5 Beltran,G.V. S2001600 25 Kaczmarek,A. L 80 400 3 Bruegger,S. L 80 400 21 Kysucka Obs. L2003000 9 Chudy,M. L 60 700 18 Michalovce Obs. L1502250 6 Daub,K.-P. L1521200 17 Morales,G. S 902000 25 Dubois,F. L1252500 30 Rim. Sobota Obs.L1502250 6 Fritsche,S. L 63 840 22 Robeck,G. S2032000 17 Gieseke,R. F 80 0 24 Schroeder,G. L 751200 19 Hoerenz,M. L 60 700 18 Suzuki,M. L100 0 23 Holl,M. L 80 400 24 Willi,X. S2001320 8