[Ips-dsgr] SWS Daily Report - 25 March 20 issued 2331 UT on 25 Mar 2020

Thu Mar 26 10:31:23 EST 2020

SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/25 MARCH 2020 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 25 MARCH AND FORECAST FOR 26 MARCH - 28 MARCH
STATUS INDICATORS SOL:GREEN   MAG:GREEN     ION: GREEN
-----------------------------------------------------------
1A. SOLAR SUMMARY
Activity 25 Mar:  Very low

Flares: none.

Observed 10.7 cm flux/Equivalent Sunspot Number for 25 Mar:  71/6

1B. SOLAR FORECAST
             26 Mar             27 Mar             28 Mar
Activity     Very low           Very low           Very low
Fadeouts     None expected      None expected      None expected
10.7cm/SSN    71/6               71/6               71/6

COMMENT: Solar activity was very low for UT day 25 Mar. There 
are currently no numbered regions on the visible disk and no 
earth-directed CMEs were observed in the available coronagraph 
imagery. Solar activity is expected to be very low for the next 
three days, 26-28 Mar. During UT day 25 Mar, the solar wind speed 
decreased from 420 km/s to 380 km/s, currently near 380 km/s. 
The total interplanetary magnetic field (Bt) stayed between 3 
nT and 6 nT and the north-south component of interplanetary magnetic 
field (Bz) varied in the range -2/+5 nT. The solar wind speed 
is expected to remain near its background levels during 26-28 
Mar.

-----------------------------------------------------------
2A. MAGNETIC SUMMARY

Geomagnetic field for Australian Region 25 Mar: Quiet

Estimated Indices 25 Mar : A   K           
   Australian Region       2   20011001
      Cocos Island         0   11000000
      Darwin               2   21111001
      Townsville           2   20011011
      Learmonth            2   20011001
      Alice Springs        1   20010001
      Gingin               1   20010001
      Canberra             0   10000000
      Hobart               2   20011001    

Estimated Antarctic Regional K Indices 25 Mar :
      Macquarie Island     1   10011001
      Casey                5   32211012
      Mawson              18   41213126

Observed Regional daily pc3 Indices 25 Mar : 
      Darwin               0   (Quiet)
      Townsville           0   (Quiet)
      Learmonth            0   (Quiet)
      Alice Springs        0   (Quiet)
      Gingin               2   (Quiet)
      Canberra            28   (Quiet to unsettled)
      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 25 Mar : A 
           Fredericksburg         3
           Planetary              4                         

Observed AFr/Ap Indices 24 Mar :  A   K
           Fredericksburg         4
           Planetary              5   2110 1221     

2B. MAGNETIC FORECAST 
Date      Ap    Conditions
26 Mar     7    Quiet
27 Mar     7    Quiet
28 Mar     7    Quiet

COMMENT: Quiet geomagnetic conditions were observed for the Australian 
region on UT day 25 Mar and mostly quiet conditions with isolated 
periods of higher activity were seen in Antarctic regions. For 
26-28 Mar, mostly quiet global geomagnetic conditions are expected.

-----------------------------------------------------------
3A. GLOBAL HF PROPAGATION SUMMARY
	            Latitude Band
Date        Low            Middle         High 
25 Mar      Normal         Normal         Normal-fair    

PCA Event : No event.

3B. GLOBAL HF PROPAGATION FORECAST
	            Latitude Band
Date        Low            Middle         High 
26 Mar      Normal         Normal         Normal
27 Mar      Normal         Normal         Normal
28 Mar      Normal         Normal         Normal

COMMENT: Maximum usable frequencies (MUFs) were mostly near predicted 
monthly values to mildly enhanced ones for UT day 25 Mar. MUFs 
are expected to be mostly near predicted monthly values for the 
next 3 UT days, 26-28 Mar.

-----------------------------------------------------------
4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY

Date   T index
25 Mar    -1

Observed Australian Regional MUFs
   Cocos Island Region:
      Enhanced by 30% during local day.
      Enhanced by 50% during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Southern Australian Region:
      Mostly near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

Monthly T index:
Month  T index
Feb      -8
Mar      -15
Apr      -16

4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date   T index  MUFs
26 Mar     0    Near predicted monthly values
27 Mar     0    Near predicted monthly values
28 Mar     0    Near predicted monthly values

COMMENT: Maximum Usable Frequencies (MUFs) ranged mostly from 
near predicted monthly values to mildly enhanced ones across 
Australian regions on 25 Mar. MUFs are expected to be mostly 
near predicted monthly values for 26-28 Mar with possible disturbed 
ionospheric support for Antarctic regions.

-----------------------------------------------------------
5. SPACE ENVIRONMENT SUMMARY

GOES satellite data for 24 Mar
       Daily Proton Fluence >1 MeV:   6.8E+04
       Daily Proton Fluence >10 MeV:  4.6E+04
       Daily Electron Fluence >2 MeV: 5.20E+07   (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 7%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
       X-ray background: A1.0

DSCOVR Satellite Solar Wind Day Averaged Data for 24 Mar
Speed: 449 km/sec  Density:    5.9 p/cc  Temp:   147000 K  Bz:   0 nT

(Courtesy Space Weather Prediction Center, Boulder USA)
-----------------------------------------------------------

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 

IMPORTANT: This e-mail, including any attachments, may contain,
confidential or copyright information.  The views expressed in 
this message are those of the individual sender, unless 
specifically stated to be the views of SWS.  If you are not 
the intended recipient, please contact the sender immediately 
and delete all copies of this e-mail and attachments. 
To unsubscribe from an IPS mail list either send an email to 
"MAIL_LIST"-leave at ips.gov.au or go to
http://www.sws.bom.gov.au/mailman/listinfo/"MAIL_LIST".
Information about training can be obtained from
http://www.sws.bom.gov.au/mailman/listinfo/ips-training.
General information is available from
http://www.sws.bom.gov.au/mailman/listinfo/ips-info.