Provisional sunspot numbers April 2015 +------+----------------+-------------------+-------+--------------+ | | | | | | | Day | Groups | Wolf number | Beck | No. of Obs. | | | | | index | | | | N S Total | N S Total | | N/S T Beck | | | | | | | +------+----------------+-------------------+-------+--------------+ | 01. | 0.7 1.5 2.2 | 9 18 27 | 106 | 5 12 5 | | 02. | 0.8 0.8 1.6 | 16 8 24 | 195 | 3 14 7 | | 03. | 1.4 0.0 1.4 | 20 0 20 | 112 | 4 15 6 | | 04. | 1.5 1.5 3.0 | 21 22 43 | 221 | 7 16 7 | | 05. | 1.7 1.0 2.8 | 22 20 42 | 371 | 7 18 8 | | 06. | 1.3 1.0 2.3 | 17 21 38 | 364 | 5 14 5 | | 07. | 0.9 0.9 1.7 | 15 24 39 | 605 | 6 15 7 | | 08. | 0.9 0.9 1.8 | 13 22 35 | 588 | 7 15 6 | | 09. | 0.6 1.1 1.7 | 9 25 34 | 556 | 7 19 7 | | 10. | 0.4 1.1 1.5 | 4 23 27 | 340 | 7 16 8 | | 11. | 1.3 1.0 2.3 | 17 20 37 | 322 | 6 19 6 | | 12. | 1.8 2.0 3.8 | 32 30 62 | 868 | 6 17 6 | | 13. | 2.4 2.1 4.5 | 45 28 73 | 1038 | 6 19 7 | | 14. | 3.4 1.0 4.5 | 63 13 76 | 1326 | 5 11 5 | | 15. | 3.5 0.5 4.0 | 70 5 75 | 1485 | 7 20 9 | | 16. | 3.5 0.4 3.9 | 73 4 77 | 1417 | 8 21 8 | | 17. | 3.5 0.9 4.4 | 69 10 79 | 1325 | 6 14 4 | | 18. | 3.8 2.1 6.0 | 72 25 97 | 1367 | 7 18 9 | | 19. | 4.4 2.2 6.6 | 76 28 104 | 1366 | 5 16 7 | | 20. | 4.1 1.9 6.1 | 68 27 95 | 1126 | 7 19 8 | | 21. | 3.9 2.6 6.4 | 59 38 97 | 985 | 8 21 8 | | 22. | 4.2 3.4 7.5 | 58 48 106 | 973 | 6 17 7 | | 23. | 4.0 1.9 5.9 | 50 30 80 | 630 | 7 19 9 | | 24. | 2.8 1.4 4.1 | 34 26 60 | 628 | 8 20 9 | | 25. | 2.1 1.4 3.4 | 26 26 52 | 763 | 5 8 3 | | 26. | 1.3 1.9 3.2 | 16 31 47 | 591 | 5 12 3 | | 27. | 0.5 1.8 2.3 | 8 25 33 | 257 | 6 16 6 | | 28. | 1.0 1.4 2.4 | 13 17 30 | 149 | 5 14 5 | | 29. | 0.4 1.1 1.5 | 4 12 16 | 39 | 6 15 4 | | 30. | 0.0 0.9 0.9 | 0 11 11 | 73 | 6 20 7 | +------+----------------+-------------------+-------+--------------+ | Mean | 2.1 1.4 3.5 | 33.3 21.2 54.5 | 673 | 6 16 7 | +------+----------------+-------------------+-------+--------------+ | Days | 30 30 30 | 30 30 30 | 30 | | +------+----------------+-------------------+-------+--------------+ Based on 490 observations of 25 stations. Araujo,G. L 80 910 30 Kaczmarek,A. L 80 400 10 Barnes,H. L 76 910 12 Kysucka Obs. L2003000 14 Battaiola,R. S 901250 7 Moeller,M. L 791000 25 Beltran,G.V. S2001600 18 Morales,G. S 902000 26 Bruegger,S. L 80 400 26 Rim. Sobota Obs.L1502250 17 Chudy,M. L 60 700 11 Rothermel,J. L1001650 11 Daub,K.-P. L1521200 23 Ruemmler,F. L 801200 23 Dubois,F. L1252500 27 Schott,G.-L. L 80 910 27 Fritsche,S. L 63 840 26 Schroeder,G. L 751200 25 Gieseke,R. F 80 0 15 Smit,F. L 801200 21 Hilbrecht,H. L1021000 1 Suzuki,M. L100 0 15 Hoerenz,M. L 60 700 23 Van Slooten,B. L 901300 28 Hurbanovo Obs. L1502250 29