[Ips-dsgr] ASWFC Daily Report - 03 March 26 issued 2330 UT on 03 Mar 2026 [SEC=OFFICIAL]

Wed Mar 4 10:30:51 AEDT 2026

SUBJ: ASWFC DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/03 MARCH 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
SUMMARY FOR 03 MARCH AND FORECAST FOR 04 MARCH - 06 MARCH
STATUS INDICATORS SOL:** YELLOW **   MAG:GREEN     ION: GREEN
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx
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1A. SOLAR SUMMARY
Activity 03 Mar:  R0

Flares: none.

Observed 10.7 cm flux/Equivalent Sunspot Number for 03 Mar: 144/98

1B. SOLAR FORECAST
             04 Mar             05 Mar             06 Mar
Activity     Low to moderate    Low to moderate    Low to moderate
Fadeouts     Possible           Possible           Possible
10.7cm/SSN   150/105            150/105            150/105

COMMENT: Solar activity on UT day 3-Mar was R0, with no solar 
flares. There are currently six numbered sunspot regions on the 
solar disk, although all regions are currently stable with showing 
only minor changes throughout the past day. Solar activity is 
expected to be R0 with a chance for R1 over 4-6 Mar.

 A CME was observed from 3/1101 UT directed to the solar east, 
but this event has been analysed as farside and therefore will 
not impact the Earth. No other CMEs were observed on 3-Mar.

 S0 solar radiation storm conditions were observed on UT day 3-Mar.
 S0 soar radiation storm conditions are expected over 4-6 Mar. 

The solar wind environment on UT day 3-Mar was mildly disturbed. 
The solar wind speed was on a general inclining trend, beginning near
 300 km/s and ending the day near 450 km/s. The peak total interplanetary
 field strength (IMF, Bt) was 11 nT and the north-south IMF component 
(Bz) was +9 to -10 nT. Southward Bz was observed from 1850 UT. The cause 
of these conditions was likely a weak transient structure from 
the Sun and not expected to be sustained. Background solar wind 
conditions are generally expected over 4-6 Mar.

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2A. MAGNETIC SUMMARY

Geomagnetic field for Australian Region 03 Mar: G0

Estimated Indices 03 Mar : A   K           
   Australian Region       8   12222323
      Cocos Island         9   12212333
      Darwin               9   22222323
      Townsville          10   22222333
      Learmonth            9   22222323
      Alice Springs        9   22222323
      Gingin               9   12222333
      Canberra             9   12222333
      Kennaook Cape Grim  10   13322323
      Hobart              10   13322323    

Estimated Antarctic Regional K Indices 03 Mar :
      Macquarie Island    11   03233422
      Casey               23   35443334
      Mawson              26   25423336

Observed Regional daily pc3 Indices 03 Mar : 
      Darwin               0   (Quiet)
      Townsville           0   (Quiet)
      Learmonth            0   (Quiet)
      Alice Springs        0   (Quiet)
      Gingin               0   (Quiet)
      Canberra             0   (Quiet)
      Hobart               0   (Quiet)

Pc3 pulsations are high frequency (10-45 second period) variations 
of the Earths magnetic field. Daily pc3-indices are the daily sum 
of 20 minute pc3-indices for that station and have been shown to be
well correlated with rejection of high resolution aeromagnetic
survey flight-line data. 

NOTE: Indices may have been generated from data obtained in 
cooperation with the following organisations: Geoscience Australia, 
University of Newcastle Space Physics Group, Australian Government 
Antarctic Division and International Center for Space Weather 
Science and Education, Japan.

Estimated AFr/Ap Indices 03 Mar : A 
           Fredericksburg         8
           Planetary             10                         

Observed AFr/Ap Indices 02 Mar :  A   K
           Fredericksburg         4
           Planetary              5   2111 2111     

2B. MAGNETIC FORECAST 
Date      Ap    Conditions
04 Mar     8    G0, chance G1
05 Mar     5    G0
06 Mar     5    G0

COMMENT: ASWFC Geomagnetic Warning 13 was issued on 3 March and 
is current for 3-4 Mar. G0 geomagnetic conditions were observed 
in the Australian region on UT day 3-Mar. G0-G1 geomagnetic conditions 
were observed in the Antarctic region stations. An isolated planetary 
period of G1 was observed at the end of 3-Mar, likely due to 
a weak transient. G0 geomagnetic conditions are expected over 
4-6 Mar, although due to favourable solar wind conditions at 
the time of writing, an isolated period of G1 is possible on 
4-Mar.

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3A. GLOBAL HF PROPAGATION SUMMARY
	            Latitude Band
Date        Low            Middle         High 
03 Mar      Normal         Normal         Normal         

PCA Event : No event.

3B. GLOBAL HF PROPAGATION FORECAST
	            Latitude Band
Date        Low            Middle         High 
04 Mar      Normal         Normal         Normal
05 Mar      Normal         Normal         Normal
06 Mar      Normal         Normal         Normal

COMMENT: HF radio propagation conditions on UT day 3-Mar were 
generally normal. HF radio propagation conditions over 4-6 Mar 
are expected to be mostly normal.

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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY

Date   T index
03 Mar   122

Observed Australian Regional MUFs
   Cocos Island Region:
      Enhanced by 15% during local day.
      Enhanced by 45% during local night.
   Niue Island Region:
      Enhanced by 40% during local day.
      Enhanced by 25% during local night.
      Enhanced by 25% after local dawn.
   Northern Australian Region:
      Enhanced by 20% during local day.
      Enhanced by 15% during local night.
      Enhanced by 30% after local dawn.
   Southern Australian Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

Monthly T index:
Month  T index
Feb      98
Mar      87
Apr      85

4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date   T index  MUFs
04 Mar   115    Near predicted monthly values to 15% enhanced
05 Mar   115    Near predicted monthly values to 15-20% enhanced
06 Mar   115    Near predicted monthly values to 15-20% enhanced

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region were near predicted values to 30% enhanced. MUFs are expected 
to be near predicted values to 15-20% enhanced over 4-6 Mar.

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5. SPACE ENVIRONMENT SUMMARY

GOES satellite data for 02 Mar
       Daily Proton Fluence >1 MeV:   1.6E+06
       Daily Proton Fluence >10 MeV:  1.7E+04
       Daily Electron Fluence >2 MeV: 5.60E+08   (high fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability:24%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
       X-ray background: B9.0

DSCOVR Satellite Solar Wind Day Averaged Data for 02 Mar
Speed: 336 km/sec  Density:    5.2 p/cc  Temp:    36900 K  Bz:   1 nT

(Courtesy Space Weather Prediction Center, Boulder USA)
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Australian Space Weather Forecasting Centre
Bureau of Meteorology
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au