AAVSO: Solar Bulletin, December 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 12	December 2005

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

Table II. December Observers

Day	N	Raw Mean	Ra
1	26	63	49
2	19	68	54
3	24	83	61
4	19	73	56
5	20	66	50
6	28	53	38
7	21	31	23
8	20	33	26
9	22	39	28
10	26	46	35
11	21	49	38
12	25	47	37
13	23	53	38
14	19	51	38
15	24	51	38
16	25	44	31
17	25	34	25
18	29	36	27
19	29	49	37
20	23	51	39
21	27	47	37
22	24	45	36
23	28	52	38
24	21	66	48
25	21	56	40
26	27	67	52
27	24	66	54
28	24	62	47
29	25	62	45
30	22	61	46
31	24	49	37
Means:	23.7	53.3	40.3
No. of Observers: 51 No. of Observations: 735

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

13	AAP	P.Abbott
25	ANGR	R.Ang
20	ARAG	G.Araujo
8	BARH	H.Barnes
7	BATR	R.Battaiola
12	BERJ	J.Berdejo
6	BLAJ	J.Blackwell
10	BMF	M.Boschat
15	BOSB	B.Bose
24	BRAB	B.Branchett
6	BRAD	D.Branchett
1	BRAM	M.Bradbury
23	BRAR	R.Branch
20	BROB	R.Brown
8	BVK	K.Bankston
3	CAMP	P.Campbell
27	CHAG	G.Morales
17	CKB	B.Cudnik
13	CLZ	L.Corp
29	CR	T.Cragg
26	DEJV	J.van Delft
22	DGP	G.Dyck
15	FERJ	J.Fernandez
23	FLET	T.Fleming
26	FUJK	K.Fujimori
3	HAYK	K.Hay
10	JAMD	D.James
6	JEFT	T.Jeffrey
10	KAPJ	J.Kaplan
17	KNJS	J.Knight
2	KROL	L.Krozel
8	LARJ	J.Larriba
29	MCE	E.Mochizuki
24	MENM	M.Menegotto
19	MMI	M.Moeller
18	OATS	S.Oatney
22	RITA	A.Ritchie
18	SCGL	G.Schott
2	SIMC	C.Simpson
6	STEM	G.Stemmler
17	STQ	N.Stoikidis
25	SUZM	M.Suzuki
8	SZUM	M.Szulc
26	TESD	D.Teske
6	TJV	J.Temprano
5	URBP	P.Urbanski
16	VARG	A.Vargas
5	VIDD	D.Vidican
13	WILW	W.Wilson
5	WRP	R.Wheeler
16	YESH	H.Yesilyaprak

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

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

Table IV. Sunspot and SID Observers Who Contributed Reports During 2005.

Sunspot Observers

AAP	Patrick Abbott	Canada
ARAG	Gema Araujo	India
ARE	Richard Allessi	USA
AJV	Javier Alonso	Spain
ANGR	Raymund Ang	Philippeans
BARH	Howard Barnes	New Zealand
BATR	Roberto Battaiola	Italy
BEB	Ray Berg	USA
BERJ	Jose Berdejo	Spain
BLAJ	John Blackwell	USA
BMF	Michael Boschat	Canada
BOSB	Biswajit Bose	India
BRAB	Brenda Branchett	USA
BRAD	David Branchett	USA
BRAM	Mark Bradbury	USA
BRAR	Robert Branch	USA
BROB	Bob Brown	USA
CAMP	Paul Campbell	Canada
CHAG	German Morales	Bolivia
CKB	Brian Cudnik	USA
CLZ	Laurent Corp	France
COMT	Thomas Compton	USA
CR	Tom Cragg	Australia
DEJV	Jacques van Delft	South Africa
DELS	Susan Delaney	USA
DEMF	Frank Dempsey	Canada
DGP	Gerald Dyck	USA
DRAJ	Jean Dragesco	France
DUBF	Franky Dubois	Belgium
FEEC	Carl Feehrer	USA
FERJ	Jose Fernandez	Spain
FLET	Tom Fleming	USA
FUJK	Kenichi Fujimori	Japan
GOEM	Martin Goetz	Germany
HALB	Brian Halls	England
HAYK	Kim Hayk	Canada
HRUT	Timothy Hrutkay	USA
JAMD	David James	USA
JEFT	Thomas Jeffrey	USA
JENJ	Jamey Jenkins	USA
JENS	Simon Jenner	England
KAPJ	John Kaplan	USA
KHAR	Rana Khan	India
KNJS	James Knight	South Africa
KQR	Richard Kinne	USA
KROL	Larry Krozel	USA
KUZM	Mikhail Kuzmin	Russia
LARJ	Jose Larriba	Spain
LERM	Michel Lerman	Canada
LEVM	Monty Leventhal	Australia
MARE	Enrico Mariani	Italy
MARJ	Jose Maranon	Spain
MCE	Etsuiku Mochizuki	Japan
MEU	Euan Mason	New Zealand
MENM	Miguel Menegotto	Argentina
MMI	Michael Moeller	Germany
OATS	Susan Oatney	USA
OBSO	IPS Observatory	Australia
OYE	Yenal Ogmen	Turkey

Sunspot Observers (cont.)

PEKT	Riza Pektas	Turkey
RICE	E. C. Richardson	England
RIDC	Charles Ridgway	USA
RITA	Arthur Ritchie	USA
SCGL	Gerd Lutz Schott	Germany
SCHG	Greg Scholl	USA
SDP	Dolores Sharples	USA
SIMC	Clyde Simpson	USA
STEF	George Stefanopoulos	Greece
STEM	Gerhard Stemmler	Germany
STQ	Nick Stoikidis	Greece
SUZM	Miyoshi Suzuki	Japan
SZAK	Kryzstoff Szatkowski	Poland
SZUM	Mieczyslaw Szulc	Poland
TESD	David Teske	USA
THR	Raymond Thompson	Canada
TJV	Javier Temprano	Spain
URBP	Piotr Urbanski	Poland
VARG	Alberto Vargas	Boliva
VIDD	Daniel Vidican	Romania
WILW	William Wilson	USA
WRP	Russell Wheeler	USA
YESH	Hulya Yesilyaprak	Turkey

SID Observers

A-29	Andy Clerkin	USA
A-50	Jerry Winkler	USA
A-52	Domenic Toldo	South Africa
A-59	Steve Hansen	USA
A-63	James Ellerbe	Spain
A-80	Peter King	England
A-84	Walter Moos	Switzerland
A-87	Mike Hill	USA
A-90	Jim Mandaville	USA
A-91	Len Anderson	Australia
A-93	Guglielmo DiFilipo	Italy
A-95	Ted Poulos	USA
A-96	Roberto Battaiola	Italy
A-97	Jon Wallace	USA
A-99	Michael King	England
A-100	Paul Campbell	Canada
A-101	Giorgio Bressan	Italy
A-102	Francois Steyn	South Africa
A-103	Biswajit Bose	India
A-107	Nick Stoikidis	Greece
A-108	Paul Mortfield	USA
A-112	Andries Son	Belgium
A-115	Mark Suhovecky	USA
A-116	Trent Bjorndahl	Canada
A-117	Ken Hubal	USA

Sudden Ionospheric Disturbance Report

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

Sudden Ionospheric Disturbances (SID) Recorded During December 2005

(Analysis performed by Michael Hill, SID Analyst)
Date	Max	Imp
051201	0835	1-
051202	0250	2+
051202	1013	1+
051202	1306	1-
051202	2017	1-
051203	0553	1-
051203	0727	1-
051213	0451	2
051213	1250	2
051213	1452	2+
051222	0954	1+
051222	1651	1
051223	0731	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
J Winkler	A50	NAA
M Hill	A87	NAA
J Mandaville	A90	NPM
L Anderson	A91	NWC
T Poulos	A95	NAA
R Battaiola	A96	HWU
M King	A99	HWU
P Campbell	A100	NLK
G Bressan	A101	HWU
F Steyn	A102	NAA NWC
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

December was a fairly slow month. There was activity mostly around the beginning of the month and then mid-month or so. Very few SID's were reported - only thirteen and of these, most were of lower importance rating. There were 139 X-ray flares recorded by the GOES-12 satellite. Of these, four were M-Class and the rest C or B class.

Solar Flare Summary Based on GOES-12 Data

SID ratings

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