03/06/2026

Solar activity continued at low levels with isolated C-class
flaring. Regions 4381 and 4384 remained the primary drivers of
activity. The largest event of the period was a C2.9 flare from
Region 4381 on March 3. Region 4384 continues to rotate further onto
the disk, but foreshortening still hinders a definitive
characterization of its magnetic complexity. Region 4378 showed some
new flux emergence but remained mostly inactive.
ÿ
Region 4383 simplified into a unipolar group following the loss of
its trailing spots, while Region 4380 decayed to plage. No
Earth-directed coronal mass ejections (CMEs) were observed in
available coronagraph imagery.
ÿ
Solar activity is expected to be at low levels, with a chance for
isolated M-class activity (R1-R2/minor-moderate) through March 6.

A brief description of Sunspots can be found on the Space Weather
Prediction Center website at, https://www.swpc.noaa.gov/phenomena/sunspotssolar-cycle[1] .
ÿ
Solar wind parameters reflected the onset of a positive polarity
coronal hole high-speed stream (+CH HSS). Solar wind speed increased
to 450 km/s. Solar wind parameters are expected to remain enhanced
due to the ongoing influence of the +CH HSS. Residual enhancements
are likely to persist, keeping conditions slightly above background
levels before another enhancement is expected with the onset of a
negative polarity coronal hole high-speed stream (-CH HSS).ÿ Active
conditions are expected on March 7 and 8 as high-speed stream
influences continue.

Weekly Commentary on the Sun, the Magnetosphere, and the Earth's
Ionosphere, March 5, 2026, by F. K. Janda, OK1HH:

"Overall solar activity declined, with the number of sunspot groups
ranging between three and six over the past week. Their magnetic
configuration was simple, so no significant flares on the solar disk
was observed.

"However, the solar flux remained at a relatively high level of
130-148 s.f.u., which, together with a decrease in geomagnetic
activity (no major disturbances, just alternating calm and
moderately active days), resulted in improved conditions for
shortwave propagation.

"The current trend is expected to continue for the time being. A
change will be caused by a decline in solar activity in the second
decade of March. This will be very noticeable in the decline in
solar radio flux."

The greater than 2 MeV electron flux at geosynchronous orbit is
expected to reach high levels on March 8, 11 and 12, and March 15 to
19 due to anticipated influence from multiple, recurrent, CH HSSs.
The remainder of the outlook period is likely to be at normal to
moderate levels.

Geomagnetic field activity is expected to range from quiet to G2
(Moderate) geomagnetic storm levels. Active conditions are likely on
March 10, 12, March 14 and 15, and March 20.ÿ Unsettled conditions
are likely on March 8 and 9, March 11, March 13, and March 16 to 19.
All elevated levels of geomagnetic activity are associated with the
anticipated influence of multiple, recurrent, CH HSSs. The remainder
of the outlook period is likely to be at mostly quiet levels.

The current solar report from Dr. Tamitha Skov, WX6SWW, can be found
on YouTube at, https://www.youtube.com/watch?v=6SoYfTnrudc[2] .

The Predicted Planetary A Index for March 7 to 13 is 5, 8, 10, 18,
10, 15, and 10, with a mean of 10.9.ÿ Predicted Planetary K Index is
2, 3, 3, 4, 3, 4, and 3, with a mean of 3.1.ÿ 10.7-centimeter flux
is 156, 156, 150, 145, 140, 135, and 128, with a mean of 144.3.

For more information concerning shortwave radio propagation, see http://www.arrl.org/propagation[3] and the ARRL Technical Information
Service web page at, http://arrl.org/propagation-of-rf-signals[4]. For
an explanation of numbers used in this bulletin, see http://arrl.org/the-sun-the-earth-the-ionosphere[5] . Information and
tutorials on propagation can be found at, http://k9la.us/[6] .

Also, check this:

https://bit.ly/3Rc8Njt[7]

"Understanding Solar Indices" from September 2002 QST.

ÿ


[1] https://www.swpc.noaa.gov/phenomena/sunspotssolar-cycle
[2] https://www.youtube.com/watch?v=6SoYfTnrudc
[3] http://www.arrl.org/propagation
[4] http://arrl.org/propagation-of-rf-signals
[5] http://arrl.org/the-sun-the-earth-the-ionosphere
[6] http://k9la.us/
[7] https://bit.ly/3Rc8Njt
---
þ Synchronet þ Whiskey Lover's Amateur Radio BBS

03/13/2026

Solar activity was very low to low. Only low-level C-class activity
was observed from Regions 4384 and 4389. Slight growth was observed
in Regions 4384 and 4391. New Region 4392 was numbered. The rest of
the spot groups were either stable or in decay. No Earth-directed
CMEs were observed. Solar activity is expected to be at low levels,
with a slight chance for M-class (R1-R2/minor-moderate) flares,
through March 14.
ÿ
Solar wind parameters were enhanced through March 11. Solar wind
speed ranged from approximately 480 to 570 km/s during this time but
decreased to around 400-460 km/s through the rest of the period.
ÿ
High Speed Stream activity persists through March 14.

Elevated probabilities are related to the flare potential of both
currently observed spot groups as well as the potential from
returning regions.

No proton events are expected at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit is
expected to be at high levels March 16 to 19, and then on March 23
to 30 due to the influence from multiple, recurrent, Coronal Hole
High Speed Streams. The remainder of the outlook period is likely to
be at normal to moderate levels.

Geomagnetic field activity is expected to reach G1 (Minor)
geomagnetic storm levels on March 14, 22, and 25 during the onset of
a CH HSS. G2 (Moderate) geomagnetic storm levels are likely on March
21 due to negative polarity CH HSS effects. Unsettled to active
levels are likely on March 15 to 20, 23 and 24, and on March 256 to
28. All elevated levels of geomagnetic activity are associated with
the anticipated influence of multiple, recurrent, CH HSSs. The
remainder of the outlook period is likely to be at mostly quiet
levels.

The latest solar report from Dr. Tamitha Skov, WX6SWW, can be found
on YouTube at, https://www.youtube.com/watch?v=c9gloRUmKAI[1] .

The Predicted Planetary A Index for March 14 to 20 is 20, 15, 10,
10, 10, 12, and 15, with a mean of 13.1.ÿ The Predicted Planetary K
Index is 5, 4, 3, 3, 3, 4, and 4, with a mean of 4.1.ÿ 10.7
centimeter flux is 110, 110, 110, 110, 110, 105, and 110, with a
mean of 109.3.

For more information concerning shortwave radio propagation, see http://www.arrl.org/propagation[2] and the ARRL Technical Information
Service web page at, http://arrl.org/propagation-of-rf-signals[3]. For
an explanation of numbers used in this bulletin, see http://arrl.org/the-sun-the-earth-the-ionosphere[4] . Information and
tutorials on propagation can be found at, http://k9la.us/[5] .

Also, check this:

https://bit.ly/3Rc8Njt[6]

"Understanding Solar Indices" from September 2002 QST.
NNNN

ÿ


[1] https://www.youtube.com/watch?v=c9gloRUmKAI
[2] http://www.arrl.org/propagation
[3] http://arrl.org/propagation-of-rf-signals
[4] http://arrl.org/the-sun-the-earth-the-ionosphere
[5] http://k9la.us/
[6] https://bit.ly/3Rc8Njt
---
þ Synchronet þ Whiskey Lover's Amateur Radio BBS