[Ips-wsgr] ASWFC Weekly Solar and Geophysical Report (03 July 26) issued 0156 UT on 03 Jul 2026 [SEC=OFFICIAL]

Fri Jul 3 11:56:52 AEST 2026

SUBJ: ASWFC WEEKLY SOLAR AND GEOPHYSICAL REPORT 
ISSUED ON 03 JULY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (26 JUNE - 02 JULY)
Date     26    27    28    29    30    01    02
10cm    163   188   186   195   203   201   203
AFr      13     8     6     4    17    15  (  5)
Aaus      8     2     2     0    10    12  (  1)
T        87    89    80    75    75   102    89

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

26 Jun 
Solar:        R0
Geomagnetic:  G0
Frequencies:  
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 45% during local night.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

27 Jun 
Solar:        R0
Geomagnetic:  G0
Frequencies:  
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Enhanced by 30% during local day.
      Near predicted monthly values during local night.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      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.

28 Jun 
Solar:        R0
Geomagnetic:  G0
Frequencies:  
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      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.

29 Jun 
Solar:        R1, with an M1.4 at 2140UT
Geomagnetic:  G0
Frequencies:  
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Enhanced by 20% over the UT day.

30 Jun 
Solar:        R3, with an M1.3 at 0116UT, an M5.3 at 1251UT, 
              an M5.8 at 1257UT, and an X1.1 at 2050UT
Geomagnetic:  G0
In the BOM magnetometer data for 30 Jun, a weak (15nT) impulse 
was observed at 1151UT.
Frequencies:  
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Mostly near predicted monthly values.
      Enhanced by 35% after local dawn.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
   Southern Australian Region:
      Mostly near predicted monthly values.
      Enhanced by 20% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

01 Jul 
Solar:        R2, with an M1.1 at 0627UT, an M1.0 at 0643UT, 
              an M1.5 at 0735UT, an M2.5 at 0817UT, an M1.3 at 
              1008UT, an M1.0 at 1126UT, an M1.2 at 1244UT, an
              M1.1 at 1431UT, an M2.6 at 1455UT, an M3.5 at 
              1943UT, an M1.8 at 2022UT, and an M8.5 at 2309UT
Geomagnetic:  G0
In the BOM magnetometer data for 01 Jul, a weak (11nT) impulse 
was observed at 1441UT.
Frequencies:  
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Mostly near predicted monthly values.
      Enhanced by 30% after local dawn.
   Northern Australian Region:
      Enhanced by 25% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Enhanced by 20% during local day.
      Enhanced by 20% during local night.
      Enhanced by 25% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

02 Jul 
Solar:        R1, with an M1.1 at 0002UT, an M4.2 at 0156UT, 
              an M2.8 at 1026UT, and an M1.2 at 2312UT
Geomagnetic:  G0
Frequencies:  
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Enhanced by 20% over the UT day.

2. FORECAST (03 JULY - 09 JULY)
Solar: 
Solar flare activity is expected to be at the R1-R2 level over 03-06 Jul, with
three 
large sunspot regions producing M-class flares over the past 48 hours, and a new

sunspot region, visible with Solar Orbiter, due to rotate over the eastern limb
within
the next 48 hours. R0-R1 from 07-09 Jul, as some of these regions rotate over
the 
western limb.

Geomagnetic:  
G2 geomagnetic conditions are forecast on 03-Jul due to the glancing impact of a
CME
first observed on 30-Jun. G1 conditions, with a chance of G2, are forecast for
04-Jul 
due to the ongoing geomagnetic activity from this CME, as well as the combined 
glancing impact of three CMEs observed on 01-Jul and 02-Jul. G0-G1 geomagnetic 
conditions are forecast on 05-Jul as these conditions subside. G0 conditions are
forecast for 06-07 Jul. G0, with a chance of G1 conditions are forecast for
08-Jul 
due to high speed wind stream effects from a recurring coronal hole. G0
conditions 
are forecast for 09-Jul.

Frequencies:  
Maximum Usable Frequencies (MUFs) in the Australian region are forecast to
become 
depressed over 03-Jul due to forecast geomagnetic activity, with 15-20%
depressions
forecast. Mild depressions are expected over 04-05 Jul as this geomagnetic
activity 
continues. Mild depressions are also possible on 09-Jul due to high speed wind
stream
effects from a recurrent coronal hole. MUFs near predicted monthly values on
other 
days.

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