[Ips-msgr] IPS Monthly Report - May 01
rwc
rwc at ips.gov.au
Mon Jun 4 11:31:19 EST 2001
SUBJ: IPS MONTHLY SUMMARY - MAY 2001
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-May 210 2 128
02-May 176 6 136
03-May 172 7 136
04-May 176 7 141
05-May 161 1 135
06-May 155 3 137
07-May 138 9 127
08-May 129 10 136
09-May 129 24 134
10-May 130 13 125
11-May 137 5 113
12-May 138 24 126
13-May 139 19 98
14-May 138 8 101
15-May 142 11 91
16-May 138 6 98
17-May 147 4 86
18-May 138 5 104
19-May 141 6 113
20-May 142 3 108
21-May 150 2 111
22-May 152 5 112
23-May 159 6 123
24-May 170 5 107
25-May 162 4 122
26-May 147 3 112
27-May 147 5 110
28-May 143 11 125
29-May 139 6 139
30-May 132 1 118
31-May 133 0 106
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
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 00 200.0 169.1 119.6 12.8 147.3 54
Aug 00 163.1 130.5 118.4 10.7 145.9 3
Sep 00 182.1 109.9 116.1 13.1 132.1 15
Oct 00 167.8 100.1 114.7 12.0 133.4 11
Nov 00 178.8 106.5 112.7 14.4 135.4 23
Dec 00 173.0 104.5 111.3p 8.2 143.0 7
Jan 01 166.7 95.1 108.6p 8.4 139.2 8
Feb 01 147.3 80.1 105.5p 7.0 137.2 1
Mar 01 177.7 114.2 104.7p 14.0 142.6 36
Apr 01 178.3 108.2 105.1p 14.4 129.4 45
May 01 148.7 97.3 105.4p 7.1 118.0 11
Monthly T indices
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1992 153 173 155 134 96 80 88 67 69 67 85 90
1993 75 78 80 64 63 65 63 51 38 41 34 44
1994 57 41 43 26 16 15 23 18 21 21 21 21
1995 25 34 23 13 4 12 13 11 13 10 13 8
1996 12 8 5 2 6 3 3 5 4 4 11 15
1997 14 11 11 9 12 6 9 18 33 28 28 39
1998 41 42 44 57 45 57 78 76 89 71 75 94
1999 95 82* 90 78* 99 125 126 107 90 92 124 115*
2000 108* 121* 159* 156 135 134 149 139 124* 133* 139* 143*
2001 140 140 148* 141* 121^ 118^ 115^ 111^ 107^ 103^ 101^ 100^
2002 98^ 97^ 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^
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
01 May 01 M2.4/SF 1917UT
02 May 01 M1.8 0040UT
05 May 01 M1.0/1F 0856UT
12 May 01 M3.0/1B 2335UT 2242-2345UT
13 May 01 M3.6/SN 0304UT 0258-0308UT
15 May 01 M1.0/1N 0300UT
16 May 01 M1.3/SF 1042UT
17 May 01 M1.2/1F 1652UT
20 May 01 M6.4 0603UT 0600-0606UT
20 May 01 M1.5 0920UT
24 May 01 M1.2/1N 1944UT
2.1 Comments on Solar Activity.
Solar activity was at mostly low to moderate levels this month.
High activity was observed on 20 May, due to an M6.4 flare
at 0603UT, the largest flare for the month. A 10Mev
proton event was observed from 1945UT on 07 May to 1730UT
on 08 May.
===============================================================================
3. GEOMAGNETIC DISTURBANCES (for Australian Region)
DATE COMMENTS
08-10 May 01: Active to minor storm periods.
12-13 May 01: Minor Storm periods.
15 may 01: Mild recurrent activity.
19 May 01: Mild recurrent activity.
23 May 01: Mild recurrent activity.
27 May 01: Active to Minor storm periods.
No strong geomagnetic disturbances were observed this month.
Moderate activity was observed 08-10 May and 12-13 May.
The cause of activity during interval 08-10 May is unclear.
Activity during interval 12-13 May followed a shock in the
solar wind at 0922UT on 12 May. Activity on 28 may
followed a shock in the solar wind at 1417UT on 27 May.
===============================================================================
4. IONOSPHERIC DISTURBANCES (for Australian Region)
04 May 01 Southern region MUFs enhanced 25%
13-14 May 01 Southern region MUFs depressed 15-20%,
particularly local night hours. Spread F observed.
16-18 May 01 Southern region MUFs depressed 15%. Spread F observed.
29 May 01 Southern region MUFs enhanced 21%
Northern region MUFs depressed 10-20% at times,
local day. Spread F observed.
No deep MUF depressions were observed this month.
Moderately depressed conditions were observed during
the interval 13-18 May, in assciation with increased
geomagnetic activity during this period. MUFs were
variable on 29 May.
===============================================================================
5. IPS WARNINGS AND ALERTS ISSUED
WARNINGS:
HF RADIO WARNING:
ISSUE DATE NO BEGIN END
08 May 01 30 09 May 01 10 May 01
12 May 01 31 13 May 01 13 May 01
24 May 01 32 27 May 01 28 May 01
GEOMAGNETIC WARNING:
ISSUE DATE NO BEGIN END
07 May 01 18 09 May 01 10 May 01
20 May 01 19 23 May 01 24 May 01
24 May 01 20 27 May 01 28 May 01
ALERTS:
01 May 01: Flare Alert
02 May 01: Flare Alert
07 May 01: Proton
08 May 01: Proton
09 May 01: Geomagnetic
10 May 01: Geomagnetic
12 May 01: Geomagnetic
12 May 01: Flare Alert
13 May 01: Flare Alert
24 May 01: Flare Alert
SWF ALERTS AND DURATION REPORTS
DATE SWF BEGIN-END (UT)
13 May 01: SWF Alert (0259-0314 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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