[Ips-dsgr] ASWFC Daily Report - 08 May 26 issued 2330 UT on 08 May 2026 [SEC=OFFICIAL]
Australian Space Weather Forecasting Centre
aswfc at bom.gov.au
Sat May 9 09:30:53 AEST 2026
SUBJ: ASWFC DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/08 MAY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
SUMMARY FOR 08 MAY AND FORECAST FOR 09 MAY - 11 MAY
STATUS INDICATORS SOL:** YELLOW ** MAG:GREEN ION: GREEN
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx
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1A. SOLAR SUMMARY
Activity 08 May: R0
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 08 May: 120/72
1B. SOLAR FORECAST
09 May 10 May 11 May
Activity R1, chance of R2 R1, chance of R2 R1, chance of R2
Fadeouts Possible Possible Possible
10.7cm/SSN 125/78 125/78 120/72
COMMENT: Solar flare activity on UT day 08-May was at the R0
level, with several low level C-class flares observed. There
are currently four numbered sunspot regions visible on the solar
disk and one unnumbered region. Active region (AR) 4432 (N12W23,
beta) is the largest region on the disk and has exhibited spot
development over the UT day. An unnumbered region recently rotated
over the eastern limb near N18E89 (beta) and appears stable.
This is possibly returning region AR 4419, which previously produced
flares at the R3 level. All other sunspot regions are either
stable or in decay. Solar flare activity is expected to be at
the R1 level over 09-11 May, with a chance of R2. S0 solar proton
conditions were observed on UT day 08-May. S0 solar proton conditions
are expected over 09-11 May. No Earth-directed coronal mass ejections
(CMEs) have been observed. The solar wind speed on UT day 08-May
increased, ranging from 400 to 590 km/s and is currently near
525 km/s. The peak total interplanetary magnetic field strength
(IMF, Bt) was 20 nT and the north-south IMF component (Bz) range
was -12 to +15 nT. The solar wind speed is expected to decline
over 09-11 May due to waning coronal hole high speed wind stream
effects.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 08 May: G0
Estimated Indices 08 May : A K
Australian Region 6 21222222
Cocos Island 5 12221212
Darwin 7 22222312
Townsville 9 22332312
Learmonth 10 22322323
Alice Springs 7 21222312
Gingin 7 21222223
Canberra 6 11222222
Kennaook Cape Grim 7 11232222
Hobart 6 11222222
Estimated Antarctic Regional K Indices 08 May :
Macquarie Island 9 10233411
Casey 13 33332323
Mawson 22 43322336
Observed Regional daily pc3 Indices 08 May :
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 08 May : A
Fredericksburg 11
Planetary 14
Observed AFr/Ap Indices 07 May : A K
Fredericksburg 6
Planetary 7 1101 1332
2B. MAGNETIC FORECAST
Date Ap Conditions
09 May 8 G0
10 May 6 G0
11 May 6 G0
COMMENT: G0 geomagnetic conditions were observed in the Australian
and planetary regions on UT day 08-May. Mostly G0 geomagnetic
conditions were observed in the Antarctic region, with an isolated
period of G2 observed at Mawson. G0 planetary geomagnetic conditions
are expected over 09-11 May.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
08 May Normal-fair Normal Normal-fair
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
09 May Normal Normal Normal-fair
10 May Normal Normal Normal
11 May Normal Normal Normal
COMMENT: Global ionospheric conditions were normal to fair on
UT day 08-May. Ionospheric conditions are expected to be mostly
normal on 09-May, and normal over 10-11 May. Shortwave fadeouts
are possible.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
08 May 75
Observed Australian Regional MUFs
Cocos Island Region:
No data available during local day.
No data available during local night.
Niue Island Region:
Near predicted monthly values during local day.
Depressed by 15% during local night.
Northern Australian Region:
Near predicted monthly values during local day.
Depressed by 15% during local night.
Southern Australian Region:
Near predicted monthly values.
Antarctic Region (Casey/Davis/Mawson):
Near predicted monthly values over the UT day.
Monthly T index:
Month T index
Apr 74
May 71
Jun 68
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
09 May 70 Near predicted monthly values
10 May 70 Near predicted monthly values
11 May 70 Near predicted monthly values
COMMENT: Maximum Usable Frequencies (MUFs) in the Australian
region were mostly near predicted monthly values on UT day 08-May,
with 15% depressions observed in northern Australia during local
night hours. Spread F was observed at Hobart during local night
hours. MUFs are expected to be near predicted monthly values
over 09-11 May. Shortwave fadeouts are possible.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 07 May
Daily Proton Fluence >1 MeV: 3.2E+06
Daily Proton Fluence >10 MeV: 1.8E+04
Daily Electron Fluence >2 MeV: 2.30E+07 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 4%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: B6.7
DSCOVR Satellite Solar Wind Day Averaged Data for 07 May
Speed: 358 km/sec Density: 3.9 p/cc Temp: 72800 K Bz: 2 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
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