[Ips-msgr] IPS Monthly Report - December 0
rwc
rwc at ips.gov.au
Wed Jan 3 14:45:30 EST 2001
SUBJ: IPS MONTHLY SUMMARY - DECEMBER 2000
ISSUED BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
1. SOLAR-GEOPHYSICAL INDICES
SOLAR AUST AUST
Day 10 cm flux A-INDEX T INDEX
01-Dec 185 7 140
02-Dec 167 5 166
03-Dec 164 13 156
04-Dec 152 6 132
05-Dec 147 7 134
06-Dec 141 12 156
07-Dec 144 12 138
08-Dec 138 16 104
09-Dec 135 14 92
10-Dec 147 10 122
11-Dec 144 6 143
12-Dec 150 5 153
13-Dec 165 4 144
14-Dec 182 4 144
15-Dec 188 4 148
16-Dec 191 6 160
17-Dec 197 7 149
18-Dec 198 12 155
19-Dec 199 5 136
20-Dec 201 4 158
21-Dec 195 5 147
22-Dec 190 10 156
23-Dec 191 13 148
24-Dec 193 11 124
25-Dec 187 12 134
26-Dec 189 7 132
27-Dec 188 11 137
28-Dec 185 9 137
29-Dec 182 9 149
30-Dec 182 4 167
31-Dec 170 3 173
10 CM FLUX SUNSPOT NUMBER AUST AUST No of
A-INDEX T INDEX FLARES
Monthly Monthly Yearly Monthly Monthly >M1.0
Month Average Average Average Average Average
Dec 99 169.8 86.4 111.0 13.1 138.3 9
Jan 00 158.3 90.2 112.8 13.6 123.9 9
Feb 00 173.7 112.3 116.6 15.9 124.9 15
Mar 00 208.2 138.2 119.8 8.2 147.1 38
Apr 00 184.2 125.3 120.7 10.3 154.9 11
May 00 184.5 120.8 118.9 9.7 138.7 20
Jun 00 178.8 124.9 118.6 10.0 133.5 24
Jul 00 200.0 169.1 120.6p 12.8 147.3 54
Aug 00 163.1 130.5 122.1p 10.7 145.9 03
Sep 00 182.1 109.9 121.6p 13.1 132.1 15
Oct 00 167.8 100.1 120.4p 12.0 133.4 11
Nov 00 178.8 106.5 119.9p 14.4 135.4 23
Dec 00 173.0 104.5 119.3p 8.2 143.0 7
Monthly T indices
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1991 143 176 170 163 136 120 140 124 136 130 120 130
1992 152 173 155 134 96 80 88 66 68 66 84 89
1993 75 77 79 63 63 65 64 50 38 41 34 43
1994 57 41 43 26 16 15 23 18 21 20 21 20
1995 24 34 23 13 4 12 12 10 13 9 13 7
1996 11 8 4 2 5 2 3 4 4 4 10 15
1997 14 11 10 9 11 6 9 17 32 27 28 38
1998 40 43 45 57 44 55 77 76 87 70 74 93
1999 95 82 89 78 98 124 125 106 89 92 123 114
2000 107 121 161 155 134 133* 145 140 122* 112* 121^ 119^
2001 117^ 114^ 112^ 112^ 111^ 110^ 108^ 107^ 106^ 105^ 103^ 102^
2002 100^ 98^ 95^ 93^ 91^ 89^ 86^ 84^ 81^ 79^ 76^ 74^
2003 71^ 69^ 66^ 64^ 61^ 59^ 57^ 54^ 52^ 49^ 47^ 45^
2004 43^ 41^ 39^ 37^ 35^ 33^ 31^ 29^ 28^ 26^ 24^ 23^
2005 21^ 20^ 19^ 17^ 16^ 15^ 14^ 13^ 12^ 11^ 10^ 9^
2006 8^ 8^ 7^ 6^ 6^ 5^ 5^ 5^ 4^ 4^ 4^ 4^
2007 4^ 5^ 5^ 6^ 7^ 8^ 9^ 11^ 13^ 16^ 18^ 21^
* = New data. T index may have changed.
^ = IPS predicted T index.
===============================================================================
2. FLARES AND SHORT-WAVE FADEOUTS
DATE CLASS M CLASS X FLARE FADEOUT POSSIBLE ON
FLARES FLARES MAX DAYLIGHT HF CIRCUIT
06 Dec 00 M1.6/SF 2230UT
12 Dec 00 M1.3/1F 1507UT
24 Dec 00 M1.1/SF 1115UT
26 Dec 00 M1.3/SF 1613UT
27 Dec 00 M4.3/1F 1544UT 1530-1553UT
29 Dec 00 M1.2/1F 0223UT
29 Dec 00 M1.2/1F 1848UT
2.1 Comments on Solar Activity.
Solar activity was at low to moderate levels for December. The largest flare
for the month was an M4.3 flare at 1544UT on 27 Dec.
===============================================================================
3. GEOMAGNETIC DISTURBANCES (for Australian Region)
DATE COMMENTS
8-9 Dec 00: Unsettled to Active
23 Dec 00: Unsettled to Active.
No significant geomagnetic disturbances were observe dduring the month of December.
Mild activity was observed during the intervals 6-10 Dec and 22-25 Dec.
===============================================================================
4. IONOSPHERIC DISTURBANCES (for Australian Region)
08 Dec 00: Regional MUFs depressed 15%.
09 Dec 00: Northern region MUFs depressed 30-40% local day.
Some southern region sites depressed 20-30%.
24 Dec 00: Northern region MUFs depressed 15% local night.
Southern region MUfs depressed 20% local day.
No significant ionospheric depressions were observed during the month
of December. However, mild depressions were observed during the intervals
8-10 Dec and 23-25 Dec.
===============================================================================
5. IPS WARNINGS AND ALERTS ISSUED
WARNINGS:
HF RADIO WARNING:
ISSUE DATE NO BEGIN END
8 Dec 00 82 9 Dec 00 10 Dec 00
24 Dec 00 83 25 Dec 00 27 Dec 00
GEOMAGNETIC WARNING:
ISSUE DATE NO BEGIN END
4 Dec 00 54 7 Dec 00 10 Dec 00
18 Dec 00 55 21 Dec 00 22 Dec 00
22 Dec 00 56 23 Dec 00 25 Dec 00
ALERTS:
01 Dec FLARE ALERT
07 Dec FLARE ALERT
13 DEC FLARE ALERT
19 DEC FLARE ALERT
22 DEC MAGNETIC ALERT
23 DEC MAGNETIC ALERT
27 DEC FLARE ALERT
28 DEC FLARE ALERT
29 DEC FLARE ALERT
30 DEc FLARE ALERT
IPS Radio and Space Services | email: asfc at ips.gov.au
PO Box 1386 | WWW: http://www.ips.gov.au/asfc
Haymarket NSW 1240 AUSTRALIA | FTP: ftp://ftp.ips.gov.au/users/asfc/
tel: +61 2 9213 8010 | fax: +61 2 9213 8060
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