[Ips-dsgr] ASWFC Daily Report - 07 August 26 issued 2330 UT on 07 Aug 2026 [SEC=OFFICIAL]
Australian Space Weather Forecasting Centre
aswfc at bom.gov.au
Sat Aug 8 09:30:48 AEST 2026
SUBJ: ASWFC DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/07 AUGUST 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
SUMMARY FOR 07 AUGUST AND FORECAST FOR 08 AUGUST - 10 AUGUST
STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx
-----------------------------------------------------------
1A. SOLAR SUMMARY
Activity 07 Aug: R0
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 07 Aug: 97/44
1B. SOLAR FORECAST
08 Aug 09 Aug 10 Aug
Activity R0 R0 R0
Fadeouts None expected None expected None expected
10.7cm/SSN 95/41 90/34 90/34
COMMENT: Solar flare activity on UT day 07-Aug was at the R0
level, with no significant flares observed. There are currently
four active regions visible on the solar disk. All are simple,
stable and quiet and three of these regions are expected to rotate
off the visible disk over the next 24 hours. Solar flare activity
is forecast to be at the R0 level over 08-10 Aug due to a lack
of complex active regions. Solar radiation storm conditions were
at the S0 level on 07-Aug and are forecast to remain at this
level over 08-10 Aug. No Earth-directed coronal mass ejections
(CMEs) were observed on 07-Aug. An east directed CME was visible
from 07/0636UT in SOHO and STEREO-A imagery. This CME is associated
with an eruption over the eastern limb visible from 07/0545UT
in GOES SUVI and SDO imagery. This CME is not considered geoeffective.
The solar wind speed was low and steady over 07-Aug, mostly ranging
between 275 km/s and 255 km/s and is currently at around 260
km/s. The interplanetary magnetic field strength (IMF, Bt) peaked
at 6 nT at 07/1120UT. Potentially indicating the anticipated
arrival of a glancing CME. The north south component (Bz) ranged
between +3 and -4 nT. A slight increase in the solar wind speed
is possible on 08-Aug due to a potential glancing impact from
a CME first observed on 04-Aug. Otherwise, solar wind speed is
expected to remain near background levels over 08-10 Aug, with
the possibility of a slight increase on 10-Aug due to a series
of small coronal holes rotating towards a geoeffective position.
-----------------------------------------------------------
2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 07 Aug: G0
Estimated Indices 07 Aug : A K
Australian Region 0 00101000
Cocos Island 1 01201000
Darwin 1 11101001
Townsville 1 00101011
Learmonth 0 00101000
Alice Springs 1 01101000
Gingin 1 00102000
Canberra 0 00101000
Kennaook Cape Grim 1 00102000
Hobart 1 00102000
Estimated Antarctic Regional K Indices 07 Aug :
Macquarie Island 1 00112000
Casey 1 01101000
Mawson 1 11111000
Observed Regional daily pc3 Indices 07 Aug :
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 07 Aug : A
Fredericksburg 5
Planetary 5
Observed AFr/Ap Indices 06 Aug : A K
Fredericksburg 5
Planetary 3 1111 0100
2B. MAGNETIC FORECAST
Date Ap Conditions
08 Aug 8 G0
09 Aug 2 G0
10 Aug 5 G0
COMMENT: G0 geomagnetic conditions were observed at the planetary
level and in the Australian and Antarctic regions on UT day 07-Aug.
G0 geomagnetic conditions are expected over 08-10 Aug. There
is the possibility of a glancing CME impact on 08-Aug and a slight
solar wind speed increase on 10-Aug, but, considering the low
ambient geomagnetic conditions, neither of these is expected
to produce a geomagnetic storm.
-----------------------------------------------------------
3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
07 Aug Normal-fair Normal-fair Normal
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
08 Aug Normal Normal Normal-fair
09 Aug Normal Normal Normal
10 Aug Normal Normal Normal
COMMENT: Global high-frequency (HF) radio propagation conditions
on UT day 07-Aug were normal to fair, with some depressed conditions
and degradations observed at low and mid latitudes over the UT
day. Global HF propagation conditions are forecast to be mostly
normal over the period 08-10 Aug.
-----------------------------------------------------------
4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
07 Aug 49
Observed Australian Regional MUFs
Cocos Island Region:
No data available during local day.
No data available during local night.
Niue Island Region:
Depressed by 15% during local day.
Depressed by 35% during local night.
Northern Australian Region:
Near predicted monthly values during local day.
Depressed by 25% during local night.
Depressed by 20% after local dawn.
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
Jul 75
Aug 64
Sep 61
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
08 Aug 60 Near predicted monthly values
09 Aug 60 Near predicted monthly values
10 Aug 60 Near predicted monthly values
COMMENT: Maximum Usable Frequencies (MUFs) on UT day 07-Aug in
the southern Australian region were near predicted monthly values.
MUFs in the northern Australian region were depressed during
local night hours. Spread F was observed at almost all sites
in the Australian region. MUFs are forecast to be mostly near
predicted values over 08-10 Aug.
-----------------------------------------------------------
5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 06 Aug
Daily Proton Fluence >1 MeV: 1.2E+05
Daily Proton Fluence >10 MeV: 1.9E+04
Daily Electron Fluence >2 MeV: 2.50E+07 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 4%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: B2.8
DSCOVR Satellite Solar Wind Day Averaged Data for 06 Aug
Speed: 314 km/sec Density: 1.4 p/cc Temp: 33800 K Bz: -1 nT
(Courtesy Space Weather Prediction Center, Boulder USA)
-----------------------------------------------------------
Australian Space Weather Forecasting Centre
Bureau of Meteorology
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au
More information about the ips-dsgr
mailing list