[Ips-dsgr] SWS Daily Report - 30 May 22 issued 2330 UT on 30 May 2022 [SEC=OFFICIAL]
Regional Warning Centre
rwc at ips.gov.au
Tue May 31 09:30:52 EST 2022
SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/30 MAY 2022 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 30 MAY AND FORECAST FOR 31 MAY - 02 JUNE
STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx
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1A. SOLAR SUMMARY
Activity 30 May: R0
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 30 May: 101/49
1B. SOLAR FORECAST
31 May 01 Jun 02 Jun
Activity R0 R0 R0
Fadeouts None expected None expected None expected
10.7cm/SSN 100/48 100/48 100/48
COMMENT: Solar activity on UT day 30-May was at R0 level, with
two low-level C-class flares from AR3019 (N10W76). AR3025 (N28W60,
beta) is the most complex region, and has decreased in spot count.
Solar activity is expected to be at R0 level on 31-May to 02-Jun.
Several CMEs were observed, but none are considered to be geoeffective.
The solar wind speed on 30-May remains elevated due to continued
coronal hole effects, ranging from 510-605 km/s, and is currently
near 500 km/s. The peak total interplanetary magnetic field strength
(IMF, Bt) was 7 nT, and the north-south IMF component (Bz) range
was +6 to -5 nT. The solar wind speed is expected to decrease
over 31-May to 02-Jun, although it is possible that a slight
increase may be observed due to a possible weak CME impact from
late 31-May, from a CME first observed on 28-May.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 30 May: G0
Estimated Indices 30 May : A K
Australian Region 8 32221232
Darwin 7 32121222
Learmonth 8 32222231
Alice Springs 8 32221232
Gingin 9 32111242
Canberra 7 32211222
Hobart 7 32211222
Estimated Antarctic Regional K Indices 30 May :
Macquarie Island 4 22211210
Casey 20 34321262
Mawson 48 66433266
Observed Regional daily pc3 Indices 30 May :
Darwin 0 (Quiet)
Townsville NA
Learmonth 0 (Quiet)
Alice Springs 0 (Quiet)
Gingin 4 (Quiet)
Canberra 2 (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 30 May : A
Fredericksburg 8
Planetary 8
Observed AFr/Ap Indices 29 May : A K
Fredericksburg 14
Planetary 15 3343 3323
2B. MAGNETIC FORECAST
Date Ap Conditions
31 May 8 G0
01 Jun 8 G0
02 Jun 5 G0
COMMENT: G0 geomagnetic conditions were observed in the Australian
region on UT day 30-May. G0 to G2 levels were observed in the
Antarctic region. The geomagnetic field continues to be mildly
disturbed due to coronal hole wind stream effects. G0 conditions
are expected on 31-May to 02-Jun. There is a slight chance of
a mild increase in geomagnetic activity from late 31-May due
to a possible weak impact from a CME first observed on 28-May.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
30 May Normal Normal Normal
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
31 May Normal Normal Normal-fair
01 Jun Normal Normal Normal-fair
02 Jun Normal Normal Normal
COMMENT: Mostly normal HF propagation conditions are expected
for 31-May to 02-Jun.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
30 May 56
Observed Australian Regional MUFs
Cocos Island Region:
Enhanced by 15% during local day.
Near predicted monthly values during local night.
Niue Island Region:
Mostly near predicted monthly values.
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
Apr 77
May 51
Jun 54
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
31 May 65 Near predicted monthly values
01 Jun 65 Near predicted monthly values
02 Jun 65 Near predicted monthly values
COMMENT: Maximum usable frequencies (MUFs) on UT day 30-May were
mostly near monthly predicted values. Spread-F was observed at
Hobart between 0900-2100UT, and sporadic-E was observed at Darwin
between 0500-0900UT and Cocos Islands from 1000UT. MUFs are expected
to be mostly near monthly predicted values during 31-May to 02-Jun.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 29 May
Daily Proton Fluence >1 MeV: 6.9E+04
Daily Proton Fluence >10 MeV: 3.4E+04
Daily Electron Fluence >2 MeV: 2.00E+07 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 3%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: B2.1
DSCOVR Satellite Solar Wind Day Averaged Data for 29 May
Speed: 537 km/sec Density: 8.6 p/cc Temp: 581000 K Bz: -2 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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