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ASWFC GEOMAGNETIC DISTURBANCE WARNING ISSUED AT 0733 UTC/26 APRIL
2024 BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.  A coronal
hole wind stream has moderately enhanced the solar wind speed and
been associated with several hours worth of southward IMF parameter
Bz. For this reason, it is possible that periods of G1 and G2
geomagnetic storm conditions may be observed.  INCREASED GEOMAGNETIC
ACTIVITY EXPECTED DUE TO CORONAL HOLE HIGH SPEED WIND STREAM FROM 26
and 27 APRIL 2024, GEOMAGNETIC ACTIVITY FORECAST, 26 Apr, G0, slight
chance G1 and G2 27 Apr, G0, slight chance G1 Australian Space
Weather Forecasting Centre.  After a big jump in solar activity,
conditions continued to improve in the past week.  Twelve new
sunspot groups emerged, two on April 18, three more on April 19,
five more on April 21, another on April 22 and one more on April 24.
Average daily sunspot number jumped from 142.7 to 265.9, and average
daily solar flux from 177.4 to 216.  The Sun set another sunspot
number record this week when the numbers were 283, 283, 282 and 283
on April 21 to 24. The last time we saw a higher daily sunspot
number was 296 on April 17, 2014, 3,661 days ago.  April 2014 was
the peak of Solar Cycle 24.  Predicted solar flux over the next
month shows values peaking at 215 from May 15 and 16 and again on
May 19 and 20.  We see solar flux at 155, 145 and 135 on April 26 to
28, 130 on April 29 through May 2, 160 on May 3 to 6, then 165, 170,
180, 185, 190, 195, 200, and 210 on May 7 to 14, then 215 on May 15
and 16, 212 on May 17 and 18, 215 on May 19 and 20, then 200 and 190
on May 21 and 22, 170 on May 23 and 24, 165, 160 and 155 on May 25
to 27, then 160 on May 28 through June 2.  Predicted planetary A
index is 15 on April 26 and 27, then 12, 10, 8 and 5 on April 28
through May 1, 10 on May 2 and 3, 5 on May 4, 8 on May 5 to 7, 5 on
May 8 to 18, then 10, 15, 10 and 12 on May 19 to 22, 15 on May 23
and 24, 12, 8 and 7 on May 25 to 27, and 10 on May 28 to 30, 5 on
May 31, and 8 on June 1 to 3.  There is no report from OK1HH this
week due to problems with the Czech electric power grid.  Steve,
NN4X wrote on April 26, The SFI and SSN have been very high lately,
as you are more than well aware.  Sadly, no F2 has been noted on 6m,
but on the evening of Wednesday, 4/24/2024 at around 10 pm ET.  10m,
Noted BY still being received here in EL98 FT8. Also, received
multiple decodes from CS7AUT in IM67.  Not bad for 10pm.  In another
message, on the evening of April 25 he sent a long list of 10 and 12
meter FT8 decodes at 1142 PM EDT.  Signals from all over North
America, plus Brazil, New Zealand, Australia, Russia and China.
Links to articles on ARRL informational pages, solar indices, solar
flares, and the latest video from Dr. Tamitha Skov, WX6SWW can be
found in teleprinter, packet, and Internet versions of 2024
Propagation Forecast Bulletin ARLP017.  Sunspot numbers were 247,
243, 240, 283, 283, 282, and 283 with a mean of 265.9. 10.7 cm flux
was 226.9, 213.4, 209.5, 217.1, 226.8, 219.1, and 199.1, with a mean
of 216.  Estimated planetary A indices were 4, 41, 12, 19, 9, 8, and
4, with a mean of 13.9. Middle latitude A index was 5, 21, 10, 14,
10, 9, and 4, with a mean of 10.4.

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