[Ips-dsgr] SWS Daily Report - 24 July 22 issued 2330 UT on 24 Jul 2022 [SEC=OFFICIAL]
Regional Warning Centre
rwc at ips.gov.au
Mon Jul 25 09:30:52 EST 2022
SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/24 JULY 2022 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 24 JULY AND FORECAST FOR 25 JULY - 27 JULY
STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx
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1A. SOLAR SUMMARY
Activity 24 Jul: R0
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 24 Jul: 107/57
1B. SOLAR FORECAST
25 Jul 26 Jul 27 Jul
Activity R0 R0 R0
Fadeouts None expected None expected None expected
10.7cm/SSN 108/58 106/55 102/50
COMMENT: Solar activity on UT day 24-Jul was at the R0 level,
with several C-class flares. There are currently six numbered
sunspot regions on the solar disk. AR3060 (N14W48, alpha), AR3064
(N11W20, beta) have shown spot growth. All other regions are
either stable or in decay. Solar activity is expected to be at
the R0 level over 25-27 Jul. Several CMEs were observed but none
are considered to be geoeffective. A filament eruption was observed
in the southeast quadrant of the solar disk visible in SDO and
H-alpha imagery from 24/1849UT and will be monitored for any
subsequent CME. Analysis of two CMEs observed on UT day 23-Jul,
a farside halo CME and a southwest CME, concluded that there
are no Earth-directed components. The solar wind speed on 24-Jul
was elevated due to ongoing coronal hole high speed wind stream
effects, and ranged from 572 to 486 km/s and is currently near
490 km/s with a declining trend. The peak total interplanetary
field strength (IMF, Bt) was 6 nT and the north-south IMF component
(Bz) range was +5 to -4 nT. The solar wind speed is expected
to continue to decline to near background levels over 25-27 Jul
as the effects of a coronal hole high speed wind stream abate.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 24 Jul: G0
Estimated Indices 24 Jul : A K
Australian Region 7 22212321
Darwin 5 12211221
Learmonth 7 22312320
Alice Springs 7 22212321
Gingin 6 22211321
Canberra 6 22212320
Hobart 7 12312320
Estimated Antarctic Regional K Indices 24 Jul :
Macquarie Island 9 22312331
Casey 15 33321351
Mawson 26 54442353
Observed Regional daily pc3 Indices 24 Jul :
Darwin 0 (Quiet)
Townsville NA
Learmonth 0 (Quiet)
Alice Springs 0 (Quiet)
Gingin 9 (Quiet)
Canberra 7 (Quiet)
Hobart 6 (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 24 Jul : A
Fredericksburg 7
Planetary 9
Observed AFr/Ap Indices 23 Jul : A K
Fredericksburg 15
Planetary 18 3632 2223
2B. MAGNETIC FORECAST
Date Ap Conditions
25 Jul 9 G0
26 Jul 7 G0
27 Jul 5 G0
COMMENT: G0 geomagnetic conditions were observed in the Australian
region on UT day 24-Jul. Mostly G0 conditions were observed in
the Antarctic region, with isolated periods of G1 at Casey and
Mawson. G0 geomagnetic conditions are expected over 25-27 Jul.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
24 Jul Normal Normal Normal
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
25 Jul Normal Normal Normal-fair
26 Jul Normal Normal Normal
27 Jul Normal Normal Normal
COMMENT: Mostly normal HF propagation conditions are expected
on 25-27 Jul.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
24 Jul 68
Observed Australian Regional MUFs
Cocos Island Region:
Enhanced by 15% during local day.
Depressed by 15% 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.
Southern Australian Region:
Near predicted monthly values.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Enhanced by 15% over the UT day.
Monthly T index:
Month T index
Jun 60
Jul 65
Aug 67
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
25 Jul 70 Near predicted monthly values
26 Jul 65 Near predicted monthly values
27 Jul 65 Near predicted monthly values
COMMENT: Maximum usable frequencies (MUFs) on UT day 24-Jul were
near monthly predicted values. Spread-F was observed at Brisbane
and Hobart during local night hours. Periods of sporadic E were
observed at Brisbane, Cocos Islands and Darwin. MUFs are generally
expected to be near monthly predicted values over 25-27 Jul.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 23 Jul
Daily Proton Fluence >1 MeV: 2.0E+06
Daily Proton Fluence >10 MeV: 3.0E+04
Daily Electron Fluence >2 MeV: 1.60E+07 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 3%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: B4.3
DSCOVR Satellite Solar Wind Day Averaged Data for 23 Jul
Speed: 549 km/sec Density: 8.2 p/cc Temp: 345000 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
PO Box 1386 WWW: http://www.sws.bom.gov.au
Haymarket NSW 1240 AUSTRALIA FTP: ftp://ftp-out.sws.bom.gov.au
tel: +61 2 9213 8010 fax: +61 2 9213 8060
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