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From: dave@esi.COM.AU (Dave Horsfall)
Newsgroups: aus.radio,rec.radio.info
Subject: Weekly IPS Report - 10 Sep 93
Message-ID: <4486@eram.esi.COM.AU>
Date: 10 Sep 93 03:54:43 GMT
Followup-To: aus.radio,rec.radio.amateur.misc
Distribution: world
Lines: 80
Approved: rec-radio-info@ve6mgs.ampr.ab.ca


                  3 SEPTEMBER - 9 SEPTEMBER 1993


Issue No 37
Date of issue:  10 September, 1993

INDICES:
Date     03    04    05    06    07    08    09
10cm    080   079   080   079   078   079   079
A        28    26    11    11    09    07 ( 03)
T        41    41    32    36    39    38    42


                     SUMMARY OF ACTIVITY

September 3
Solar activity was very low.
The geomagnetic field at Learmonth (WA) was quiet until 0600UT, then
unsettled to active.
Ionospheric F2 critical frequencies at Sydney were 10 to 30% below
predicted monthly values.

September 4
Solar activity was low.
The geomagnetic field at Learmonth (WA) was quiet to active.
Ionospheric F2 critical frequencies at Sydney were 10 to 40% below
predicted monthly values with some spread F at night.

September 5
Solar activity was very low.
The geomagnetic field at Learmonth (WA) was quiet to unsettled, with
an active period from 14-15UT.
Ionospheric F2 critical frequencies at Sydney were 15 to 30% below
predicted monthly values, with strong spread F for most of the night.

September 6
Solar activity was very low.
The geomagnetic field at Learmonth (WA) was quiet.
Ionospheric F2 critical frequencies at Sydney were 5 to 30% below
predicted monthly values, with some spread F at night.

.SK
September 7
Solar activity was very low.
The geomagnetic field at Learmonth (WA) was quiet.
Ionospheric F2 critical frequencies at Sydney were 5 to 25% below
predicted monthly values, with some spread F at night.

September 8
Solar activity was very low.
The geomagnetic field at Learmonth (WA) was quiet.
Ionospheric F2 critical frequencies at Sydney were 10 to 30% below
predicted monthly values.

September 9
Solar activity was very low.
The geomagnetic field at Learmonth (WA) was quiet.
Ionospheric F2 critical frequencies at Sydney were 10 to 30% depressed
00-02UT, 07-15UT, and from 19UT onwards, and otherwise near predicted.

Critical frequencies at Sydney have been regularly depressed this month
relative to monthly predicted values. This has been due to the monthly
predictions being too high, rather than to the occurrence of ionospheric
activity.

     FORECAST FOR THE NEXT WEEK (10 - 16 SEPTEMBER)

SOLAR:        Very low.

GEOMAGNETIC:  Active to minor storm levels from either late on the 11th
              or early on the 12th, through until the 14th. Quiet levels
              are expected at other times.

IONOSPHERIC:  30 to 60% below predicted monthly values 13-14 September,
              and 10 to 30% below predicted monthly values at other times.

-- 
Dave Horsfall (VK2KFU)    VK2KFU @ VK2RWI.NSW.AUS.OC     PGP 2.3
dave@esi.COM.AU           ...munnari!esi.COM.AU!dave    available