[Ips-wsgr] IPS Weekly Solar and Geophysical Report (27 April 01)

[rwc]

SUBJ: IPS WEEKLY SOLAR AND GEOPHYSICAL REPORT 
ISSUED ON 27 APRIL 2001, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (20 APRIL - 26 APRIL)
Date     20    21    22    23    24    25    26
10cm    180   191   193   196   194   194   196
AFr       5     7    17    18    11     7 ( 10)
Aaus      4     6    21    10     7     5 (  6)
T       123   133   126    73   117   126   138

Solar:        Solar flare activity
Geomagnetic:  Geomagnetic activity observed for Australian Region.
Frequencies:  Australian Ionospheric F2 critical frequencies

20 Apr 
Solar:        moderate, with an M1/1F at 0523UT, and an M4/1F at 2004UT
Geomagnetic:  Quiet 
Frequencies:  
near predicted monthly values


21 Apr 
Solar:        low
Geomagnetic:  Quiet to Unsettled 
Frequencies:  
   Equatorial PNG Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Enhanced by 25% during local night.
      Enhanced by 15% after local dawn.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base):
      Near predicted monthly values over the UT day.


22 Apr 
Solar:        moderate, with an M3/1N at 2044UT
Geomagnetic:  Unsettled to Minor storm. 
Frequencies:  
   Equatorial PNG Region:
      Mostly near predicted monthly values,
      Enhanced by 30% after local dawn.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian and New Zealand Region:
      Mostly near predicted monthly values,
      Depressed by 25% after local dawn.
   Antarctic Region (Casey/Scott Base):
      Near predicted monthly values over the UT day.


23 Apr 
Solar:        moderate, with an M1/1F at 0128UT, and an M4/2N at 2030UT
Geomagnetic:  Quiet to Unsettled 
Frequencies:  
   Equatorial PNG Region:
      Near predicted monthly values during local day,
      Depressed by 30% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Depressed by 20% during local night.
   Southern Australian and New Zealand Region:
      Depressed by 35% during local day,
      Depressed by 35% during local night.
   Antarctic Region (Casey/Scott Base):
      Depressed by 15% over the UT day.


24 Apr 
Solar:        high, with an M2/1N at 0542UT, an M3/1F at 0700UT, an
              M1/1N at 1253UT, an M2/1N at 1812UT, and an M1/1N at 2224UT
Geomagnetic:  Quiet to Unsettled 
Frequencies:  
   Equatorial PNG Region:
      Mostly near predicted monthly values,
      Enhanced by 25% after local dawn.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Depressed by 15% during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values during local day,
      Depressed by 15% during local night.
   Antarctic Region (Casey/Scott Base):
      Near predicted monthly values over the UT day.


25 Apr 
Solar:        moderate, with an M2/2N at 1348UT
Geomagnetic:  Quiet 
Frequencies:  
   Equatorial PNG Region:
      Mostly near predicted monthly values,
      Enhanced by 20% after local dawn.
   Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base):
      Near predicted monthly values over the UT day.


26 Apr 
Solar:        high, with an  M7/2B at 1312UT 
Geomagnetic:  Quiet to Unsettled 
Frequencies:  
   Equatorial PNG Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Enhanced by 20% during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base):
      Near predicted monthly values over the UT day.


 
2. FORECAST (27 APRIL - 03 MAY)
Solar: Moderate to high.

Geomagnetic:
	27 April: Quiet to unsettled
	28 April: Quiet to unsettled initially, with storm levels
                  expected later in the UT day.
	29 April: Minor to major storm levels.
	30 April: Active to unsettled.
	1-3 May: Mostly quiet to unsettled.

Frequencies:
	27 April: Near predicted monthly values.
	28 April: Near predicted monthly values initially,with
                  15-30% depressions possible later in the UT day.
	29 April: Depressed 15-30%.
	30 April: Depressed 10-20% to near predicted.
	1-3 May: Near predicted monthly values.

PEASE NOTE: 
At this time of the solar cycle, space weather conditions
are frequently determined by short timescale events, not
able to be forecasted a week in advance.

IPS Radio and Space Services      | email: asfc at ips.gov.au
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