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Solar Bulletin August, 2001
Solar Bulletin | | THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS - SOLAR DIVISION | Carl E. Feehrer, Editor
9 Gleason Rd.
Bedford, MA 01730 | Email: cfeehrer@hotmail.com
ISSN 0271-8480 |
| | Volume 57 Number 8 | August
2001 |
| Table I. Mean Sunspot Numbers for August
[boldface =
maximum, minimum] | Table II. August
Observers | | Day | N | Raw | s.d. | K-corrected | s.d. | s.e. |
| 1 |
47 | 93 | 4.1 | 73 | 2.3 | 0.34 | | 2 | 35 | 115 | 4.4 | 94 | 2.7 | 0.46 | | 3 | 44 | 133 | 4.5 | 111 | 2.4 | 0.36 | | 4 | 44 | 164 | 6.1 | 132 | 3.1 | 0.47 | | 5 | 45 | 183 | 7.4 | 146 | 3.7 | 0.55 | | 6 | 46 | 173 | 6.3 | 139 | 2.8 | 0.41 | | 7 | 42 | 171 | 4.7 | 140 | 2.1 | 0.32 | | 8 | 45 | 159 | 5.3 | 133 | 2.4 | 0.36 | | 9 | 43 | 139 | 5.1 | 111 | 2.5 | 0.38 | | 10 | 48 | 129 | 3.7 | 106 | 1.5 | 0.22 | | 11 | 43 | 159 | 5.2 | 131 | 2.8 | 0.43 | | 12 | 41 | 148 | 5.6 | 122 | 3.4 | 0.53 | | 13 | 37 | 120 | 5.1 | 95 | 2.3 | 0.38 | | 14 | 50 | 124 | 4.5 | 100 | 1.9 | 0.27 | | 15 | 55 | 145 | 4.3 | 118 | 2.4 | 0.32 | | 16 | 42 | 162 | 6.3 | 124 | 3.4 | 0.52 | | 17 | 42 | 145 | 6.0 | 113 | 3.8 | 0.59 | | 18 | 43 | 139 | 5.9 | 115 | 2.9 | 0.44 | | 19 | 42 | 137 | 4.7 | 110 | 3.0 | 0.46 | | 20 | 41 | 128 | 5.4 | 102 | 2.0 | 0.31 | | 21 | 45 | 150 | 5.4 | 125 | 2.6 | 0.39 | | 22 | 46 | 159 | 5.6 | 126 | 3.0 | 0.44 | | 23 | 40 | 157 | 6.5 | 124 | 3.4 | 0.54 | | 24 | 44 | 144 | 7.4 | 114 | 3.9 | 0.59 | | 25 | 47 | 133 | 4.8 | 107 | 2.5 | 0.36 | | 26 | 36 | 135 | 5.2 | 113 | 2.9 | 0.48 | | 27 | 39 | 156 | 6.3 | 125 | 2.6 | 0.42 | | 28 | 37 | 155 | 6.9 | 123 | 3.0 | 0.49 | | 29 | 45 | 139 | 4.4 | 112 | 2.8 | 0.42 | | 30 | 35 | 143 | 5.2 | 116 | 3.4 | 0.57 | | 31 | 33 | 155 | 6.8 | 126 | 3.2 | 0.56 | | Means: | | 144.9 | | 117.1 | | | No. of Observations: 1322
No. of Observers: 71
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Reporting Addresses Sunspot Reports --
email: solar@aavso.org - postal mail: AAVSO, 25 Birch St.
Cambridge, MA 02138
- FAX (AAVSO): (617) 354-0665
SES Reports -- email: noatak@aol.com - postal mail: Mike Hill 114 Prospect St.
Marlboro, MA 01752
Magnetometer Reports -- email: capaavso@aol.com - postal mail: Casper Hossfield PO Box 23,
New Milford, NY 10959
- FAX: (973) 853-2588 or (407) 482-3963
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27 | AAP
ANDE
ATON
BARH
BATR
BEB
BEDJ
BEGM
BLAJ
BMF
BOSB
BRAB
BRAM
BRAR
BROB
BURS
CAMP
CARJ
CHAG
CKB
CLZ
COMT
CORA
CR
DEMF
DRAJ
DUBF
ELR
FEEC
FERJ
FLET
FUJK
GIOR
GOTS
HALB
HSF
IMPR
JAMD
JEFT
JENJ
KAPJ
KHAR
KNJS
KUZM
LERM
LEVM
MALK
MARE
MARJ
MCE
MILJ
MMI
MUDG
OBSO
RICE
RITA
SCGL
SCHG
SIMC
STEF
STEM
SUZM
SZAK
SZUM
TESD
THR
URBP
VARG
VIDD
WILW
YESH | P.Abbott
E.Anderson
A.Attanasio
H.Barnes
R.Battaiola
R.Berg
J.Bedient
M.Begbie
J.Blackwell
M.Boschat
B.Bose
B.Branchett
M.Bradbury
R.Branch
R.Brown
S.Burgess
P.Campbell
J.Carlson
G.Morales
B.Cudnik
L.Corp
T.Compton
A.Coroas
T.Cragg
F.Dempsey
J.Dragesco
F.Dubois
E.Reed
C.Feehrer
J.Fernandez
T.Fleming
K.Fujimori
R.Giovanoni
S.Gottschalk
B.Halls
C.Hossfield
R.Imperi
D.James
T.Jeffrey
J.Jenkins
J.Kaplan
R.Khan
J&S Knight
M.Kuzmin
M.Lerman
M.Leventhal
K.Malde
E.Mariani
J.Maranon
E.Mochizuki
J.Miller
M.Moeller
G.Mudry
IPS Obs.
E.Richardson
A.Ritchie
G.Schott
G.Scholl
C.Simpson
G.Stefanopoulis
G.Stemmler
M.Suzuki
K.Szatkowski
M.Szulc
D.Teske
R.Thompson
P.Urbanski
A.Vargas
D.Vidican
W.Wilson
H.Yesilyaprak | |
| | Table III. Means of Raw Group Counts (RG) and
Ratios of Spots to Groups (S:G) in August 2001 | | Day | RG | S:G | Day | RG | S:G | Day | RG | S:G | Day | RG | S:G |
| 1 | 5.8 | 6.0 | 9 | 8.1 | 7.2 | 17 | 11.0 | 3.2 | 25 | 7.5 | 7.7 | | 2 | 6.7 | 7.2 | 10 | 7.6 | 6.9 | 18 | 9.2 | 5.1 | 26 | 7.5 | 8.0 | | 3 | 7.6 | 7.5 | 11 | 9.4 | 6.9 | 19 | 8.7 | 5.8 | 27 | 9.1 | 7.1 | | 4 | 8.4 | 9.5 | 12 | 8.9 | 6.6 | 20 | 7.4 | 7.3 | 28 | 8.5 | 8.2 | | 5 | 9.0 | 10.3 | 13 | 7.1 | 6.9 | 21 | 8.5 | 7.6 | 29 | 7.5 | 8.5 | | 6 | 8.6 | 10.1 | 14 | 7.9 | 5.7 | 22 | 8.6 | 8.5 | 30 | 6.9 | 10.7 | | 7 | 9.1 | 8.8 | 15 | 10.7 | 3.6 | 23 | 8.9 | 7.6 | 31 | 7.8 | 9.9 | | 8 | 9.3 | 7.1 | 16 | 12.6 | 2.9 | 24 | 8.5 | 6.9 | Mn. | 8.5 | 7.3 |
 | Click image to enlarge.
Fig.1 Comparison of Ri (provisional) and Ra
estimates for July.
(Ri Source:
http://sidc..oma.be/index.php3) |
Smoothed Mean
Sunspot Number (Rsm) for February 2001: 110.6
 | Click image to enlarge.
Fig.2
Monthly Ra and Smoothed Mean Sunspot Numbers (Waldmeier method). |  | Click image to enlarge.
Fig.3 Maximum, mean, and minimum Ra Values
for Each Month from January 2000 to Present. | Return to the Solar Division home page
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