F A C U L A A C T I V I T Y 1st quarter 2001 Fwo, Fw, Asf, Psf * 10 Day January February March 1 33 10 420 -1 50 15 465 140 23 23 878 130 2 0 30 300 0 26 12 320 130 20 20 300 -1 3 17 33 480 0 90 30 900 150 55 30 770 100 4 40 10 390 -1 60 40 800 120 -1 -1 -1 -1 5 -1 -1 -1 -1 10 10 150 -1 10 20 240 -1 6 0 30 500 -1 30 17 350 -1 31 14 631 30 7 17 37 590 130 45 10 775 0 60 20 555 80 8 10 30 880 0 20 10 200 10 40 10 455 -1 9 20 20 320 -1 -1 -1 -1 -1 45 20 485 -1 10 60 30 880 170 25 23 918 97 15 40 1240 -1 11 60 20 630 80 10 14 304 -1 50 45 715 260 12 35 15 350 80 -1 -1 -1 -1 -1 -1 -1 -1 13 30 20 660 0 33 27 397 160 18 20 880 30 14 20 20 807 -1 43 27 1110 60 50 10 770 -1 15 10 20 845 170 27 36 939 50 25 8 248 0 16 20 14 358 140 30 20 781 80 45 10 338 100 17 29 23 869 60 30 20 1005 -1 30 10 280 -1 18 25 25 365 170 24 8 294 -1 20 10 400 -1 19 10 20 220 -1 -1 -1 -1 -1 -1 -1 -1 -1 20 20 25 860 -1 30 13 427 -1 8 35 938 -1 21 40 17 320 125 -1 -1 -1 -1 25 45 790 150 22 40 20 240 -1 50 50 560 90 30 40 770 140 23 15 25 220 -1 20 20 400 70 40 60 690 80 24 -1 -1 -1 -1 31 17 627 50 20 30 2090 -1 25 33 20 533 -1 25 18 275 60 50 40 740 100 26 38 10 1330 30 35 10 305 -1 27 37 887 120 27 25 25 670 -1 35 11 748 90 26 26 592 210 28 18 30 492 -1 75 0 500 40 23 43 515 50 29 10 20 90 -1 -1 -1 -1 -1 28 58 888 60 30 25 25 310 100 -1 -1 -1 -1 20 30 510 -1 31 20 30 310 -1 -1 -1 -1 -1 19 33 1096 -1 Mean: 25 23 525 84 36 19 565 82 30 28 703 103 29 ( 15) Days 24 ( 17) Days 28 ( 16) Days Explanation of the data: Fwo - number of area shaped facula regions without spots; Fw - number of area shaped facula regions with spots; Asf - total number of the individual faculae observed inside of the fwo- and the fw-areas only; Psf - total number of the single point shaped faculae observed outside of the fwo- and fw-areas only and without the polar faculae. The value "-1" means a observation was not made. All other numbers are the daily means of all observers multiplied by 10. Observers: F.Brandl, H.Bretschneider, M.Delfs ( WFS-Berlin ), M.Holl, E.Junker, A.Reszin, B.Schmidt, H.Stetter, M.Szulc, A.Winzer, M.Winzer Instruments: Refractors and reflectors from 50/600 to 150/2250 mm (apertures between 2 and 6 inches) Compilation and data processing: Michael Delfs, 7 June 2001 Special thanks to the "Berliner Letteverein" (vocational school in Ber- lin's district Tempelhof-Schoeneberg) for using the VAX-computer in the electronic and data engineering compartment.