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Solar Bulletin, October 2005
Solar Bulletin |
| THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS - SOLAR COMMITTEE |
Carl E. Feehrer, Editor
9 Gleason Rd.
Bedford, MA 01730 | Email: cfeehrer@hotmail.com
ISSN 0271-8480 |
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| Volume 61 Number 10 | October 2005 |
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Table I. Mean Sunspot Numbers for October 2005
[boldface = maximum, minimum] | Table II. October Observers
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| Day |
N |
Raw
Mean |
Ra |
| 1 |
30 |
11 |
7 |
| 2 |
38 |
10 |
8 |
| 3 |
26 |
13 |
8 |
| 4 |
28 |
25 |
18 |
| 5 |
27 |
28 |
21 |
| 6 |
30 |
26 |
19 |
| 7 |
21 |
24 |
16 |
| 8 |
24 |
19 |
14 |
| 9 |
32 |
12 |
9 |
| 10 |
21 |
15 |
11 |
| 11 |
21 |
14 |
10 |
| 12 |
26 |
17 |
12 |
| 13 |
19 |
7 |
5 |
| 14 |
25 |
15 |
10 |
| 15 |
27 |
14 |
11 |
| 16 |
28 |
12 |
9 |
| 17 |
23 |
16 |
11 |
| 18 |
29 |
13 |
10 |
| 19 |
28 |
18 |
12 |
| 20 |
26 |
11 |
8 |
| 21 |
25 |
11 |
8 |
| 22 |
19 |
6 |
4 |
| 23 |
26 |
1 |
1 |
| 24 |
21 |
0 |
0 |
| 25 |
23 |
0 |
0 |
| 26 |
24 |
1 |
1 |
| 27 |
20 |
1 |
1 |
| 28 |
22 |
2 |
1 |
| 29 |
21 |
6 |
5 |
| 30 |
32 |
12 |
8 |
| 31 |
28 |
23 |
17 |
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Means: | 25.5 | 12.4 | 8.9 |
No. of Observers: 56
No. of Observations: 791
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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
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SID Solar Flare Reports -- email: noatak@aol.com
- postal mail: Mike Hill
114 Prospect St. Marlboro, MA 01752
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| 13 |
AAP |
P.Abbott |
| 18 |
ARAG |
G.Araujo |
| 4 |
ARE |
R.Allessi |
| 11 |
BARH |
H.Barnes |
| 6 |
BATR |
R.Battaiola |
| 5 |
BEB |
Ray Berg |
| 15 |
BERJ |
J.Berdejo |
| 4 |
BLAJ |
J.Blackwell |
| 15 |
BMF |
M.Boschat |
| 1 |
BOSB |
B.Bose |
| 27 |
BRAB |
B.Branchett |
| 1 |
BRAM |
M.Bradbury |
| 27 |
BRAR |
R.Branch |
| 21 |
BROB |
R.Brown |
| 9 |
CAMP |
P.Campbell |
| 24 |
CHAG |
G.Morales |
| 27 |
CKB |
B.Cudnik |
| 10 |
CLZ |
L.Corp |
| 16 |
COMT |
T.Compton |
| 18 |
DEJV |
J.van Delft |
| 16 |
DGP |
G.Dyck |
| 19 |
FERJ |
J.Fernandez |
| 27 |
FLET |
T.Fleming |
| 21 |
FUJK |
K.Fujimori |
| 6 |
GOEM |
M.Goetz |
| 9 |
HALB |
B.Halls |
| 1 |
HAYK |
K.Hay |
| 11 |
JAMD |
D.James |
| 17 |
KAPJ |
J.Kaplan |
| 16 |
KNJS |
J.Knight |
| 1 |
KROL |
L.Krozel |
| 2 |
KUZM |
M.Kuzmin |
| 13 |
LARJ |
J.Larriba |
| 6 |
LERM |
M.Lerman |
| 15 |
MCE |
E.Mochizuki |
| 27 |
MMI |
M.Moeller |
| 20 |
OATS |
S.Oatney |
| 9 |
OBSO |
IPS Observatory |
| 1 |
OYE |
Y.Ogmen |
| 10 |
RICE |
E.Richardson |
| 16 |
RITA |
A.Ritchie |
| 24 |
SCGL |
G.Schott |
| 1 |
SDP |
D.Sharples |
| 8 |
SIMC |
C.Simpson |
| 15 |
STEM |
G.Stemmler |
| 23 |
STQ |
N.Stoikidis |
| 20 |
SUZM |
M.Suzuki |
| 23 |
SZUM |
M.Szulc |
| 30 |
TESD |
D.Teske |
| 6 |
THR |
R.Thompson |
| 13 |
TJV |
J.Temprano |
| 23 |
URBP |
P.Urbanski |
| 15 |
VARG |
A.Vargas |
| 25 |
WILW |
W.Wilson |
| 5 |
WRP |
R.Wheeler |
| 25 |
YESH |
H.Yesilyaprak |
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NOTE: Daily raw group and group-to-spot ratios usually summarized in Table III will not be presented until significant solar activity resumes and meaningful calculations can be made.
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Click image to enlarge.
Fig. 1. 10 cm Solar Flux and American Relative Sunspot Numbers (Ra) for October 2005
(10cm Source: http://www.drao.nrc.ca/icarus) |
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Click image to enlarge.
Fig.2 Smoothed Mean Sunspot Numbers (Rsm) from January 2000 to April 2005 (Waldmeier method). |
Michael Hill, SID Analyst
114 Prospect St
Marlborough, MA 01752 USA
noatak@aol.com |
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Sudden Ionospheric Disturbances (SID) Recorded During October 2005
| (Analysis performed by Michael Hill, SID Analyst) |
| Date |
Max |
Imp |
051005 |
0824 |
1 |
| 051012 |
0544 |
1 |
| Importance rating: Duration | -1: <19 | 1: 19-25 | 1+: 26-32 | 2: 33-45 | 2+: 46-85 | 3: 86-125 | 3+: >125 |
| Observer |
Code |
Station(s) monitored |
| M
Hill |
A87 |
NAA |
| J
Mandaville |
A90 |
NPM |
| T
Poulos |
A95 |
NAA |
| R
Battaiola |
A96 |
HWU |
| F
Steyn |
A102 |
NWC |
| P
Mortfield |
A108 |
NAA |
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| The events listed above meet at least one of the following criteria |
- Event reported by two or more observers within +/- 5 minutes
- Event matched to GOES-8 XRA event to within +/- 15 minutes and event time < 1000 UT
- Reported by observer with a high quality rating > 8 (scale 1-10)
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October was by far the slowest month for solar and SID activity that I have seen yet. IÕm sure most of you can say the same. Just under half of the reports I received were reports of No SIDS. Those that did report SIDÕs reported very few of them. There were only 2 correlated SID events to report.
Even the GOES detectors were very inactive. There were only 25 recorded X-Ray flares and of these two were C Class and the rest B Class events. A slow month indeed.
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Solar Flare Summary Based on GOES-12 Data
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