[Ips-msgr] IPS Monthly Report - May 04
rwc
rwc at ips.gov.au
Wed Jun 2 14:37:00 EST 2004
SUBJ: IPS MONTHLY SUMMARY - MAY 2004
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 94 7 69
02-May 98 4 49
03-May 91 6 53
04-May 87 8 52
05-May 89 13 45
06-May 86 6 46
07-May 85 11 46
08-May 87 9 42
09-May 93 4 39
10-May 93 4 34
11-May 90 7 44
12-May 99 7 55
13-May 101 8 51
14-May 110 2 55
15-May 115 4 54
16-May 118 2 53
17-May 111 2 58
18-May 108 2 54
19-May 109 6 59
20-May 105 10 70
21-May 107 7 58
22-May 102 8 50
23-May 104 8 59
24-May 105 10 53
25-May 102 4 57
26-May 103 2 50
27-May 102 2 53
28-May 102 7 47
29-May 101 7 54
30-May 100 11 52
31-May 95 9 46
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 03 116.7 55.2 67.9 17.5 72.9 12
Jun 03 129.4 77.4 65.3 16.3 75.4 43
Jul 03 127.8 85.0 62.1 13.3 76.7 7
Aug 03 122.1 72.7 60.3 16.2 68.4 4
Sep 03 112.3 48.8 59.8 14.5 67.0 1
Oct 03 153.1 65.6 58.4 23.6 66.6 45
Nov 03 140.8 67.2 57.0 20.1 70.6 29
Dec 03 115.1 47.0 54.8p 13.0 74.2 6
Jan 04 114.1 37.2 51.3p 17.0 46.5 12
Feb 04 107.8 46.0 47.8p 10.0 54.9 3
Mar 04 112.2 48.9 45.8p 9.8 63.2 4
Apr 04 101.3 39.3 44.0p 8.0 60.8 7
May 04 99.7 41.5 41.3p 6.4 51.8 1
Monthly T indices
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
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 70 74 93
1999 94 81 89 77 98 124 124 105 89 92 123 113
2000 108 120 157 152 129 130 146 138 123 129 136 141
2001 130 131 135 123 112 132 112 113 144 151 156 162
2002 175* 173* 167* 139* 129* 120* 112* 124* 128* 110* 110 120
2003 111 93 83 73 62* 68 75 60 61* 66* 63* 71*
2004 47 46* 55* 50* 44^ 41^ 39^ 37^ 35^ 33^ 31^ 29^
2005 28^ 27^ 25^ 24^ 23^ 22^ 20^ 19^ 18^ 17^ 16^ 15^
2006 14^ 13^ 13^ 12^ 11^ 11^ 10^ 9^ 9^ 8^ 8^ 8^
2007 7^ 7^ 7^ 8^ 8^ 9^ 9^ 10^ 11^ 11^ 12^ 13^
2008 14^ 15^ 16^ 17^ 19^ 20^ 23^ 25^ 28^ 31^ 35^ 38^
2009 42^ 45^ 49^ 52^ 55^ 58^ 62^ 65^ 68^ 70^ 73^ 75^
2010 78^ 80^ 83^ 85^ 89^ 92^ 94^ 97^ 100^ 103^ 105^ 108^
2011 110^ 112^ 113^ 114^ 115^ 115^ 115^ 115^ 115^ 114^ 113^ 113^
2012 112^ 111^ 110^ 110^ 109^ 109^ 108^ 108^ 107^ 107^ 107^ 106^
* = New data. T index may have changed.
^ = IPS predicted T index.
The IPS Monthly T-index is derived from the observed monthly
median values of foF2 for each hour at up to 40 ionospheric
stations worldwide. These records become available from IPS
stations in Australia very soon after each month, but the
majority are received up to one year later. This means that
the exact observed value of the monthly T-index is not
available until some months later.
The predicted smoothed monthly T-indices are computed by
using a statistical analysis of the observed monthly T-indices
for all solar cycles since 1938. The IPS T-indices may not be
updated each month but only when sufficient new
data becomes available.
===============================================================================
2. FLARES AND SHORT-WAVE FADEOUTS
DATE CLASS M CLASS X FLARE FADEOUT POSSIBLE ON
FLARES FLARES MAX DAYLIGHT HF CIRCUIT
21 May 04 M2.6 2352UT
2.1 Comments on Solar Activity.
Solar activity was at predominately very low to low levels during
the month of May. Only one low level M class event was observed.
===============================================================================
3. GEOMAGNETIC DISTURBANCES (for Australian Region)
DATE COMMENTS
05-07 May 04: Unsettled to active
13 May 04: Active periods observed in northern hemisphere.
20 May 04: Unsettled to active
No significant geomagnetic disturbances were observed this month.
A possible very weak shock was observed in the solar wind at 22UT
on 10 May. No geomagnetic activity followed this weak shock signature.
===============================================================================
4. IONOSPHERIC DISTURBANCES (for Australian Region)
06 May 04: 10-15% depressed local day, southern Aus/NZ region only.
09 May 04: 10-20% depressed local night.
10 May 04: 10-20% depressed first half UT day.
No significant ionospheric depressions were observed this month.
===============================================================================
5. IPS WARNINGS AND ALERTS ISSUED
WARNINGS:
HF RADIO WARNING:
ISSUE DATE NO BEGIN END
02 May 04 23 03 May 04 04 May 04
06 May 04 24 06 May 04 06 May 04
GEOMAGNETIC WARNING:
ISSUE DATE NO BEGIN END
02 May 04 16 03 May 04 04 May 04
27 May 04 17 01 Jun 04 03 Jun 04
ALERTS:
12 May 04: Flare Alert
22 May 04: Flare Alert
SWF ALERTS AND DURATION REPORTS
DATE SWF BEGIN-END (UT)
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