[Ips-dsgr] SWS Daily Report - 07 April 20 issued 2333 UT on 07 Apr 2020
rwc
rwc at ips.gov.au
Wed Apr 8 09:33:39 EST 2020
SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/07 APRIL 2020 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 07 APRIL AND FORECAST FOR 08 APRIL - 10 APRIL
STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN
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1A. SOLAR SUMMARY
Activity 07 Apr: Very low
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 07 Apr: 70/5
1B. SOLAR FORECAST
08 Apr 09 Apr 10 Apr
Activity Very low Very low Very low
Fadeouts None expected None expected None expected
10.7cm/SSN 70/5 70/5 70/5
COMMENT: Solar activity was Very Low for 07 Apr with a B4.5 flare
from a plage (Ex region 2579). Very Low levels of solar activity
are expected for the next three days, 08-10 Apr. GONG Halpha
images showed an unstable filament in the NW quadrant, near the
plage. No Earth-directed CMEs were observed in the available
coronagraph imagery. During the last 24 hours, the solar wind
speed remained near nominal levels, under 340 km/s. The total
IMF (Bt) varied between 3 nT and 6 nT. The north-south component
of IMF, Bz, was mostly neutral until 07/1400 UT then turned south
up to -5 nT. The solar wind speed is expected to be mostly near
its background levels for the next three days, 08-10 Apr, although
some slight enhancements may be observed due to weak isolated
coronal holes.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 07 Apr: Quiet
Estimated Indices 07 Apr : A K
Australian Region 0 00000011
Darwin 0 00000011
Townsville 1 11100011
Learmonth 2 00001022
Alice Springs 0 00000011
Gingin 1 00000022
Canberra 0 00000001
Hobart 1 10101011
Estimated Antarctic Regional K Indices 07 Apr :
Macquarie Island 0 00000000
Casey 6 12311122
Mawson 25 11110175
Observed Regional daily pc3 Indices 07 Apr :
Darwin 0 (Quiet)
Townsville 0 (Quiet)
Learmonth 0 (Quiet)
Alice Springs 0 (Quiet)
Gingin 0 (Quiet)
Canberra 9 (Quiet)
Melbourne NA
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 Apr : A
Fredericksburg 2
Planetary 3
Observed AFr/Ap Indices 06 Apr : A K
Fredericksburg 2
Planetary 3 1111 1101
2B. MAGNETIC FORECAST
Date Ap Conditions
08 Apr 8 Quiet to Unsettled
09 Apr 8 Quiet to Unsettled
10 Apr 8 Quiet to Unsettled
COMMENT: Quiet geomagnetic conditions were observed for the Australian
region on UT day 07 Apr. Global geomagnetic activity is expected
to be mostly at Quiet levels for the next three days, 08-10 Apr
and a times may reach Unsettled levels due to weak coronal hole
effects.
-----------------------------------------------------------
3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
07 Apr Normal Normal Normal
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
08 Apr Normal Normal Normal
09 Apr Normal Normal Normal
10 Apr Normal Normal Normal
COMMENT: Mostly normal HF propagation conditions are expected
for the next three days, 08-10 Apr.
-----------------------------------------------------------
4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
07 Apr -4
Observed Australian Regional MUFs
Cocos Island Region:
Enhanced by 15% during local day.
Enhanced by 40% during local night.
Niue Island Region:
Near predicted monthly values.
Northern Australian Region:
Depressed by 15% during local day.
Near predicted monthly values during local night.
Southern Australian Region:
Near predicted monthly values during local day.
Enhanced by 30% during local night.
Enhanced by 20% after local dawn.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted monthly values over the UT day.
Monthly T index:
Month T index
Mar 1
Apr -14
May -14
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
08 Apr -5 Near predicted monthly values
09 Apr -5 Near predicted monthly values
10 Apr -5 Near predicted monthly values
COMMENT: Maximum usable frequencies (MUFs) were near predicted
monthly values to slightly enhanced for the Australian region
on 07 Apr. Mild MUFs enhancements observed at Cocos Island region
local night. Sporadic-E occurrences were seen over some sites.
Similar levels of ionospheric support is expected for the next
three days, 08-10 Apr.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 06 Apr
Daily Proton Fluence >1 MeV: 5.9E+04
Daily Proton Fluence >10 MeV: 4.6E+04
Daily Electron Fluence >2 MeV: 1.20E+07 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 2%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: A1.0
DSCOVR Satellite Solar Wind Day Averaged Data for 06 Apr
Speed: 357 km/sec Density: 3.2 p/cc Temp: 30300 K Bz: 0 nT
(Courtesy Space Weather Prediction Center, Boulder USA)
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Space Weather Services email: asfc at bom.gov.au
Bureau of Meteorology
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