[Ips-msgr] IPS Monthly Report - February 02
rwc
rwc at ips.gov.au
Mon Mar 4 10:47:49 EST 2002
SUBJ: IPS MONTHLY SUMMARY - FEBRUARY 2002
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-Feb 246 15 127
02-Feb 241 17 141
03-Feb 233 8 126
04-Feb 235 8 163
05-Feb 221 21 150
06-Feb 203 22 130
07-Feb 192 13 147
08-Feb 192 11 149
09-Feb 199 10 160
10-Feb 217 9 152
11-Feb 202 15 152
12-Feb 208 10 153
13-Feb 204 11 168
14-Feb 196 3 155
15-Feb 195 4 176
16-Feb 194 4 188
17-Feb 197 17 157
18-Feb 193 12 127
19-Feb 189 11 135
20-Feb 193 8 161
21-Feb 201 10 159
22-Feb 192 9 152
23-Feb 188 5 170
24-Feb 193 8 186
25-Feb 211 10 174
26-Feb 208 9 165
27-Feb 199 7 143
28-Feb 204 25 157
10 CM SUNSPOT SUNSPOT AUST AUST No of
FLUX NUMBER NUMBER A-INDEX T INDEX FLARES
Monthly Monthly Yearly Monthly Monthly >M1.0
Month Average Average Average Average Average
Feb 01 147.3 80.1 104.2 7.0 137.2 1
Mar 01 177.7 114.2 104.8 14.0 142.6 36
Apr 01 178.3 108.2 107.6 14.4 129.4 45
May 01 148.7 97.3 108.7 7.1 118.0 11
Jun 01 173.7 134.0 109.8 5.9 135.8 13
Jul 01 131.3 82.2 111.7 6.5 113.6 2
Aug 01 163.2 106.8 113.6 8.0 113.3 23
Sep 01 233.3 150.7 114.1p 9.3 146.8 48
Oct 01 208.2 125.6 113.0p 15.8 149.8 36
Nov 01 212.7 106.5 112.4p 16.1 156.1 47
Dec 01 235.6 131.8 110.5p 12.6 144.7 46
Jan 02 226.8 113.9 109.0p 10.9 155.7 21
Feb 02 205.2 108.0 108.4p 11.1 154.4 19
Monthly T indices
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1992 153 172 155 134 95 80 88 66 68 66 84 90
1993 74 77 79 63 63 64 62 50 37 40 34 43
1994 57 41 42 26 15 14 23 18 20 20 20 20
1995 24 33 23 13 3 11 13 10 13 9 13 7
1996 12 7 4 2 5 2 3 4 4 3 11 15
1997 14 11 10 8 11 5 9 17 32 27 28 38
1998 40 41 43 56 46 56 76 75 86 69 74 93
1999 94 81 89 77 98 123* 124 106 89 91 123 114*
2000 108* 120* 158 154 133 133 147 140* 124 130 137 140
2001 133* 127* 137* 122* 113 134* 106* 109* 141* 151* 142* 150*
2002 115^ 114^ 110^ 105^ 99^ 93^ 88^ 85^ 82^ 79^ 77^ 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^
2008 25^ 28^ 32^ 36^ 41^ 45^ 50^ 54^ 59^ 64^ 68^ 73^
* = 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
04 Feb 02 M2.3 0602UT
04 Feb 02 M1.6 0658UT
04 Feb 02 M1.3/SF 2330UT
06 Feb 02 M1.4 1132UT
10 Feb 02 M1.6/2F 1848UT
18 Feb 02 M1.0/SF 2115UT
20 Feb 02 M4.2/SF 0251UT 0244-0256UT
20 Feb 02 M5.1/1N 0612UT 0552-0616UT
20 Feb 02 M4.3/SF 0959UT 0946-1004UT
20 Feb 02 M3.5/SF 1711UT 1703-1718UT
20 Feb 02 M2.4/1B 2107UT
21 Feb 02 M3.9 1226UT 1156-1236UT
21 Feb 02 M1.0 1823UT
21 Feb 02 M1.4 2037UT
21 Feb 02 M4.4/2N 0010UT 2349-0027UT
22 Feb 02 M4.4/2N 0010UT 2349-0027UT
27 Feb 02 M1.6/SF 1558UT
27 Feb 02 M2.2 0012UT
28 Feb 02 M2.2 0012UT
2.1 Comments on Solar Activity.
Solar activity was high on 20 Feb, with 5 M class flares
observed on this day. Solar activity was at low to moderate
levels on other days. A total of 19 M class flares were observed
during the month. The largest event for the month was an M5.1 flare
at 0612UT on 20 Feb. No X class flares were observed this month.
A brief 10MeV proton event was observed on 20 Feb 0730-0800UT.
===============================================================================
3. GEOMAGNETIC DISTURBANCES (for Australian Region)
DATE COMMENTS
01 Feb 02: Quiet to Active
02 Feb 02: Quiet to Active
05 Feb 02: Unsettled to Active
06 Feb 02: Unsettled to Active
11 Feb 02: Quiet to Active
17 Feb 02: One isolated Minor Storm period observed.
28 Feb 02: Quiet to Minor Storm
No strong geomagnetic disturbances were observed this month.
The most disturbed days were observed on 5-6 Feb and 28 Feb,
with regional A indices of 21,22 and 25 respectively.
===============================================================================
4. IONOSPHERIC DISTURBANCES (for Australian Region)
03 Feb 02: Depressed 15-20% southern Aus/NZ region.
06 Feb 02: Depressed 15% southern Aus/NZ region.
18 Feb 02: Depressed 20% southern Aus/NZ region.
No signifcant ionospheric depressions were observed during the
month, with MUFs generally above predicted monthly values. Mildly
depressed conditions were observed on 03, 06 and 18 Feb.
===============================================================================
5. IPS WARNINGS AND ALERTS ISSUED
WARNINGS:
HF RADIO WARNING:
ISSUE DATE NO BEGIN END
06 Feb 02 04 06 Feb 02 07 Feb 02
14 Feb 02 05 15 Feb 02 17 Feb 02
17 Feb 02 06 18 Feb 02 18 Feb 02
19 Feb 02 07 20 Feb 02 22 Feb 02
GEOMAGNETIC WARNING:
ISSUE DATE NO BEGIN END
04 Feb 02 03 06 Feb 02 07 Feb 02
13 Feb 02 04 15 Feb 02 16 Feb 02
20 Feb 02 05 23 Feb 02 24 Feb 02
28 Feb 02 06 28 Feb 02 28 Feb 02
ALERTS:
02 Feb 02: Geomagnetic
04 Feb 02: Flare Alert
06 Feb 02: Geomagnetic
06 Feb 02: Flare Alert
17 Feb 02: Geomagnetic
20 Feb 02: Flare Alert
21 Feb 02: Flare Alert
22 Feb 02: Flare Alert
27 Feb 02: Flare Alert
28 Feb 02: Flare Alert
28 Feb 02: Geomagnetic
SWF ALERTS AND DURATION REPORTS
DATE SWF BEGIN-END (UT)
20 Feb 02: SWF Alert (0244-0304 UT)
20 Feb 02: SWF Alert (0604-0624 UT)
22 Feb 02: SWF Alert (2354-0049 UT)
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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