AAVSO: Solar Bulletin, July 2005

Solar Bulletin, July 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

Volume 61 Number 7

July 2005

Table I. Mean Sunspot Numbers for July 2005
[boldface = maximum, minimum]

Table II. July Observers

Day	N	Raw Mean	Ra
1	38	115	84
2	36	143	109
3	43	145	114
4	33	153	118
5	35	141	101
6	31	124	91
7	37	106	77
8	30	104	75
9	35	84	65
10	40	64	49
11	45	61	47
12	37	54	41
13	36	56	42
14	38	39	28
15	30	29	22
16	29	16	12
17	33	3	2
18	38	0	0
19	39	1	1
20	42	1	1
21	42	0	0
22	37	4	3
23	34	18	13
24	34	19	14
25	30	19	14
26	33	21	16
27	35	18	13
28	43	29	22
29	39	50	37
30	40	63	48
31	34	94	70
Means:	36.3	57.2	42.9
No. of Observers: 57 No. of Observations: 1126

Reporting Addresses
Sunspot Reports -- email: solar@aavso.org postal mail: AAVSO, 25 Birch St. Cambridge, MA 02138 FAX (AAVSO): (617) 354-0665
SID Solar Flare Reports -- email: noatak@aol.com postal mail: Mike Hill 114 Prospect St. Marlboro, MA 01752

21	AAP	P.Abbott
28	ARAG	G.Araujo
1	ARE	R.Allessi
9	BARH	H.Barnes
12	BATR	R.Battaiola
20	BERJ	J.Berdejo
11	BLAJ	J.Blackwell
15	BMF	M.Boschat
3	BOSB	B.Bose
26	BRAB	B.Branchett
31	BRAR	R.Branch
31	BROB	R.Brown
8	CAMP	P.Campbell
30	CHAG	G.Morales
16	CKB	B.Cudnik
18	CLZ	L.Corp
23	COMT	T.Compton
27	CR	T.Cragg
27	DEJV	J.van Delft
26	DGP	G.Dyck
13	FEEC	C.Feehrer
22	FERJ	J.Fernandez
21	FLET	T.Fleming
22	FUJK	K.Fujimori
19	GOEM	M.Goetz
15	HAYK	K.Hay
14	HRUT	T.Hrutkay
22	KAPJ	J.Kaplan
29	KNJS	J&S
1	KROL	L.Krozel
15	LARJ	J.Larriba
13	LERM	M.Lerman
21	LEVM	M.Leventhal
18	MARE	E.Mariani
29	MARJ	J.Maranon
17	MCE	E.Mochizuki
15	MENM	M.Menegotto
28	MMI	M.Moeller
29	OATS	S.Oatney
16	OBSO	IPS Observatory
14	RICE	E.Richardson
15	RIDC	C.Ridgway
28	RITA	A.Ritchie
14	SCHG	G.Scholl
11	SIMC	C.Simpson
24	STEM	G.Stemmler
28	STQ	N.Stoikidis
21	SUZM	M.Suzuki
27	SZUM	M.Szulc
31	TESD	D.Teske
11	THR	R.Thompson
18	TJV	J.Temprano
21	URBP	P.Urbanski
21	VARG	A.Vargas
23	VIDD	D.Vidican
28	WILW	W.Wilson
29	YESH	H.Yesilyaprak

Note: An intense storm in the vicinity of AAVSO headquarters on August 2 resulted in the loss of telephone service and access to the Internet, and some equipment damage. Although it is unlikely, transmissions of solar observer reports to the AAVSO may have been affected. If you emailed a report and do not see your name and contribution listed in Table II above, please resubmit your report. Thank you. Ed.

Table III. Means of Raw Group Counts (RG) and Ratios of Spots to Groups (S:G) in July 2005

Click image to enlarge.
Fig. 1. 10 cm Solar Flux and American Relative Sunspot Numbers (Ra) for July 2005
(10cm Source: http://www.drao.nrc.ca/icarus)

Click image to enlarge.
Fig.2 Smoothed Mean Sunspot Numbers (Waldmeier method) from January 2000 to January 2005.

Michael Hill, SID Analyst
114 Prospect St
Marlborough, MA 01752 USA
noatak@aol.com

Sudden Ionospheric Disturbances (SID) Recorded During July 2005

(Analysis performed by Michael Hill, SID Analyst)
Date	Max	Imp	Date	Max	Imp	Date	Max	Imp
050701	0503	2	050710	1517	1+	050713	2155	1
050701	0730	1-	050711	1510	2	050714	0724	1+
050702	0318	2	050712	0209	2	050714	1023	1+
050702	0641	2	050712	0702	1	050714	1635	1
050702	0933	1	050712	0807	2+	050714	1724	1+
050702	1238	1+	050712	1004	1	050714	2300	2
050703	0458	2+	050712	1126	1+	050715	1146	1
050703	0914	3	050712	1214	1	050716	0341	2+
050706	0627	1-	050712	1305	2+	050716	0636	2
050706	0821	1-	050712	1558	1+	050716	0717	1+
050706	0850	1	050712	1624	1+	050716	1123	1+
050706	1307	1	050712	2141	2+	050717	0632	2+
050706	1607	1-	050712	2245	2+	050727	0502	3
050707	0802	1-	050713	0558	2+	050728	0026	2+
050707	1228	1+	050713	0640	1-	050728	0630	2
050707	1246	1	050713	0741	1	050728	2152	2
050707	1330	1+	050713	0825	1+	050728	2201	2+
050707	1520	2	050713	0905	1	050729	1733	1+
050707	1620	2+	050713	1015	1	050730	0520	1+
050708	0523	2	050713	1219	1+	050730	0628	2+
050708	1621	2+	050713	1409	2	050730	1655	3
050709	1028	2	050713	1417	2+	050730	1702	3
050709	1702	2+	050713	1424	3+	050731	0843	1-
050709	2200	2+	050713	1813	2+	050731	0925	2
050709	2208	2+	050713	1910	2	050731	1223	2

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
A Clerkin	A29	NAA NAU
J Winkler	A50	NAA NML NPM
D Toldo	A52	NWC XXX
M Hill	A87	NAA
J Mandaville	A90	HWU
L Anderson	A91	NWC
G Di Filippo	A93	HWU
T Poulos	A95	NAA
R Battaiola	A96	HWU
J Wallace	A97	NAA
M King	A99	HWU
P Campbell	A100	NLK
G Bressan	A101	HWU
F Steyn	A102	NAA NWC
B Bose	A103	VTX
L Observatory	A107	DHO
P Mortfield	A108	NAA

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)

Solar Events

July turned out to be a very active month. Even though there was a distinct lull in activity from July 19-22 where there was not a single X-Ray flare event, the month overall was active. Our observers reported a total of 75 correlated SID events. Many of these were in the low to moderate importance range with a few long duration events. This closely matches the the GOES-12 X-Ray flare observation. There were 209 X-Rray events and of these 19 were M-Class events and 2 were X-Class events. Thanks to all of you for sending in your observations. As always all reports are appreciated.

Solar Flare Summary Based on GOES-12 Data

SID ratings

Solar Bulletin, July 2005

Solar Bulletin

Sudden Ionospheric Disturbance Report

Solar Events