[Ips-wsgr] ASWFC Weekly Solar and Geophysical Report (26 April 24) issued 0109 UT on 26 Apr 2024 [SEC=OFFICIAL]

[rwc]

SUBJ: ASWFC WEEKLY SOLAR AND GEOPHYSICAL REPORT 
ISSUED ON 26 APRIL 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (19 APRIL - 25 APRIL)
Date     19    20    21    22    23    24    25
10cm    213   210   217   227   214   199   167
AFr      21    10    14     0     9     3  (  3)
Aaus     19     7    15     5     5     1  (  1)
T       132   130   138   138   142   147   144

Solar:        Solar flare activity
Geomagnetic:  Geomagnetic activity observed for Australian region.
Frequencies:  Australian ionospheric F2 critical frequencies

19 Apr 
Solar:        R1, with an M2.1 at 0453UT, and an M1.0 at 
              1307UT
Geomagnetic:  G0
In the BOM magnetometer data for 19 Apr, a weak (10nT) impulse 
was observed at 0559UT.
Frequencies:  
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 25% during local night.
   Southern Australian Region:
      Mostly near predicted monthly values.
      Depressed by 25% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

20 Apr 
Solar:        R0
Geomagnetic:  G0
Frequencies:  
   Cocos Island Region:
      Enhanced by 15% during local day.
      Enhanced by 70% during local night.
      Enhanced by 75% after local dawn.
   Niue Island Region:
      Mostly near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Southern Australian Region:
      Depressed by 30% during local day.
      Near predicted monthly values during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 15% over the UT day.

21 Apr 
Solar:        R1, with an M1.0 at 1259UT, an M2.2 at 1514UT, 
              and an M3.4 at 2152UT
Geomagnetic:  G0
Frequencies:  
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 30% during local night.
      Enhanced by 20% after local dawn.
   Niue Island Region:
      Enhanced by 25% during local day.
      Enhanced by 20% during local night.
   Northern Australian Region:
      Mostly near predicted monthly values.
      Enhanced by 25% after local dawn.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 20% over the UT day.

22 Apr 
Solar:        R1, with an M1.0 at 0813UT, an M1.6 at 1335UT, 
              an M2.8 at 1550UT, an M1.6 at 2116UT, and an M1.0 
              at 2318UT
Geomagnetic:  G0
Frequencies:  
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 30% during local night.
   Niue Island Region:
      Enhanced by 20% during local day.
      Enhanced by 45% during local night.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Mostly near predicted monthly values.
   Southern Australian Region:
      Mostly near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

23 Apr 
Solar:        R1, with an M1.0 at 2318UT, an M3.6 at 0319UT, 
              an M3.0 at 0821UT, an M1.0 at 1651UT, and an M2.9 
              at 1744UT
Geomagnetic:  G0
Frequencies:  
   Cocos Island Region:
      Enhanced by 15% during local day.
      Enhanced by 80% during local night.
      Enhanced by 20% after local dawn.
   Niue Island Region:
      Enhanced by 20% during local day.
      Enhanced by 40% during local night.
   Northern Australian Region:
      Mostly near predicted monthly values.
      Enhanced by 20% after local dawn.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

24 Apr 
Solar:        R1, with an M1.7 at 0029UT, an M1.8 at 0239UT, 
              an M1.4 at 1214UT, an M1.1 at 2250UT, and an M2.0 
              at 2259UT
Geomagnetic:  G0
Frequencies:  
   Cocos Island Region:
      Enhanced by 15% during local day.
      Enhanced by 55% during local night.
   Niue Island Region:
      Enhanced by 20% during local day.
      Enhanced by 70% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 25% during local night.
   Southern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 15% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

25 Apr 
Solar:        R1, with an M1.1 at 1712UT
Geomagnetic:  G0
Frequencies:  
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 85% during local night.
   Niue Island Region:
      Enhanced by 30% during local day.
      Enhanced by 65% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Southern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 15% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Enhanced by 15% over the UT day.

 
2. FORECAST (26 APRIL - 02 MAY)
Solar: 
R1-R2 level solar flare activity early in the week, then R0-R1 for the rest of
the week

Geomagnetic:  
G0 with a chance for G1 over 26-28 Apr. G0 on other days.

Frequencies:  
MUFs near predicted monthly values. Mild depressions possible over 26-29 Apr.


For an explanation of some of the terms in this report, go to
https://www.sws.bom.gov.au, and follow links to Educational->
Glossary on Solar Terrestrial Terms.

Australian Space Weather Forecasting Centre
Bureau of Meteorology
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au