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| Paul Mortfield, Editor | Web: www.AAVSO.org |
| c/o AAVSO 49 Bay State Rd. | Email: Paul@IndustrialStars.com |
| Cambridge, MA 02138 | ISSN 0271-8480 |
| Volume 64 Number 5 | May 2008 |
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| Images by Laurent Corp from Rodez, France |
Laurent Corp of Rodez, France took this pair of images. The white-light image on left of regions AR989, AR988 and AR987 were taken on March 29, 2008 at 14:30UT with his home made 8inch scope, stopped down to 2.4 inches with Astrosolar Baader filter and ToUCam ProII webcam. The image at right from September 16, 2007 at 13:03UT with a Coronado PST and same webcam.
Don't forget to submit your images, drawings and SID plots to include in the bulletin.
Sudden Ionospheric Disturbance Report
Michael Hill, SID Analyst
114 Prospect St
Marlborough, MA 01752 USA
noatak@aol.com
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Sudden Ionospheric Disturbances (SID) Recorded During May 2008
(Analysis performed by Michael Hill, SID Analyst)
| Date |
Max |
Imp |
| No SIDS detected |
| Importance rating: Duration | -1: <19 | 1: 19-25 | 1+: 26-32 | 2: 33-45 | 2+: 46-85 | 3: 86-125 | 3+: >125 |
| Observer |
Code |
| A Clerkin |
A29 |
| D Toldo |
A52 |
| P King |
A80 |
| M Hill |
A87 |
| L Anderson |
A91 |
| R battaiola |
A96 |
| J Wallace |
A97 |
| M King |
A99 |
| F Steyn |
A102 |
| L Observatory |
A107 |
| P Mortfield |
A108 |
| M Suhovecky |
A115 |
| K Hubal |
A117 |
| L Loudet |
A118 |
| J-P Godet |
A119 |
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)
May showed no end to the inactivity that we are experiencing with the sun. There were no correlated SID events reported. In fact there were none reported at all by our observers. There were only two reported flare events noted by the GOES spacecraft and both were B-Class events. Very non energetic but a sign of activity none the less.Thanks to our observers for continued reports even in these times of little or no action
Solar Flare Summary Based on GOES-12 Data
Sunspot Data
American Relative Sunspot Numbers(Ra) for May 2008 [boldface = maximum, minimum]
| Day |
N |
Raw
Mean |
Ra |
| 1 |
33 |
1 |
1 |
| 2 |
26 |
0 |
0 |
| 3 |
37 |
0 |
0 |
| 4 |
41 |
7 |
5 |
| 5 |
31 |
3 |
3 |
| 6 |
34 |
0 |
0 |
| 7 |
31 |
0 |
0 |
| 8 |
31 |
0 |
0 |
| 9 |
24 |
0 |
0 |
| 10 |
26 |
0 |
0 |
| 11 |
30 |
0 |
0 |
| 12 |
30 |
0 |
0 |
| 13 |
31 |
2 |
2 |
| 14 |
27 |
0 |
0 |
| 15 |
31 |
10 |
7 |
| 16 |
32 |
19 |
12 |
| 17 |
35 |
15 |
11 |
| 18 |
29 |
19 |
12 |
| 19 |
26 |
20 |
15 |
| 20 |
30 |
9 |
6 |
| 21 |
25 |
2 |
2 |
| 22 |
29 |
0 |
0 |
| 23 |
28 |
0 |
0 |
| 24 |
33 |
0 |
0 |
| 25 |
35 |
1 |
1 |
| 26 |
33 |
0 |
0 |
| 27 |
29 |
0 |
0 |
| 28 |
34 |
0 |
0 |
| 29 |
31 |
0 |
0 |
| 30 |
28 |
0 |
0 |
| 31 |
29 |
0 |
0 |
Means |
30.6 |
3.5 |
2.5 |
Total No. of Observers: 49
Total No. of Observations: 949
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May 2008 Sunspot Observers
| AAP |
A. Abbott |
11 |
| AJV |
J. Alonso |
12 |
| ARAG |
G. Araujo |
31 |
| BARH |
H. Barnes |
12 |
| BATR |
R. Battaiola |
6 |
| BERJ |
J. Berdejo |
9 |
| BMF |
M. Boschat |
20 |
| BRAB |
B. Branchett |
30 |
| BRAD |
D. Branchett |
27 |
| BRAR |
R. Branch |
25 |
| BROB |
R. Brown |
25 |
| BVC |
A. Buck |
31 |
| CHAG |
G. Morales |
29 |
| CKB |
B. Cudnik |
25 |
| CLZ |
L. Corp |
11 |
| CNT |
D. Chantiles |
15 |
| COMT |
T. Compton |
19 |
| DGP |
G. Dyck |
12 |
| DUBF |
F. Dubois |
30 |
| FERJ |
J. Fernandez |
9 |
| FLET |
T. Fleming |
29 |
| FUJK |
K. Fujimori |
21 |
| GFT |
F. Gobet |
4 |
| HAYK |
K. Hay |
20 |
| HMQ |
M. Harris |
34 |
| KAPJ |
J. Kaplan |
22 |
| KNJS |
J. & S. Knight |
9 |
| LARJ |
J. Larriba |
14 |
| MARE |
E. Mariani |
6 |
| MARJ |
J. Maranon |
23 |
| MCE |
E. Mochizuki |
20 |
| MILJ |
J. Miller |
17 |
| MMI |
M. Moeller |
30 |
| OATS |
S. Oatney |
22 |
| RICE |
E. C. Richardson |
17 |
| SCHG |
G. Scholl |
7 |
| SIMC |
C. Simpson |
10 |
| STEF |
G. Stefanopoulis |
16 |
| STQ |
N. Stoikidis |
25 |
| SUZM |
M. Suzuki |
22 |
| SZUM |
M. Szulc |
29 |
| TESD |
D. Teske |
25 |
| TJV |
J. Temprano |
15 |
| URBP |
P. Urbanski |
24 |
| VARG |
A. Vargas |
24 |
| VIDD |
D. Vidican |
15 |
| WILW |
W. Wilson |
28 |
| WRP |
R. Wheeler |
4 |
| YESH |
H. Yesilyaprak |
28 |
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Reporting addresses:
Sunspot Reports
Email: solar@aavso.org
Postal Mail: AAVSO,
49 Bay State Rd. Cambridge, MA, 02138
Fax: 617-354-0665
SID Flare Reports
Email: noatak@aol.com
Postal Mail: Mike Hill,
114 Prospect St., Marlboro, MA, 01752
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Smoothed Mean Sunspot Numbers (Rsm) from January 2000 to November 2007 (Waldmeier method). |
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10 cm Solar Flux and American Relative Sunspot Numbers (Ra) for May 2008
(10cm Source: http://www.drao.nrc.ca/icarus) |
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