Solar activity forecast for the period March 20 - March 26, 2026

Activity level: very low to low
X-ray background flux (1.0-8.0 A): in the range B2.5-B8.5
Radio flux (10.7 cm): a fluctuation in the range 100-138
Events: class C (0-8/day), class M (0-1/period), class X (0-0/period), proton (0-0/period)
Relative sunspot number (Ri): in the range 37-101

Vlastislav Feik
RWC Prague, Astronomical Institute, Solar Dept., Ondrejov, Czech Republic 

Geomagnetic activity forecast for the period March 20 - March 26, 2026

Quiet:  Mar 26
Unsettled: Mar 25 - 26
Active: Mar 20 - 24
Minor storm:   Mar 20 - 21, 24
Major storm:  possible about Mar 20, 24
Severe storm: 0

Because of coronal hole 33/-4, and the current series of the last CMEs, we expect geomagnetic activity enhance during the coming days. We expect at most active conditions with a possible storming event the coming two days, March 20 - 21.
The other active episode with possible about Tuesday,  March 24, when an another magnetic storm can occur.
The last two days, we expect a partial geomagnetic activity decrease to the unsettled level.

Tomas Bayer
RWC Prague
Institute of Geophysics of the ASCR, Prague
Department of Geomagnetism
Budkov observatory (BDV)

Weekly Commentary on the Sun, the Magnetosphere, and the Earth's Ionosphere March 20 - March 26, 2026

Weekly Commentary on the Sun, the Magnetosphere, and the Earth's Ionosphere, March 19, 2026

Solar activity has been declining over the past two weeks and, despite forecasts that generally predicted an increase, it remains low. Furthermore, there is no reason to expect a significant rise. While increases in geomagnetic activity usually recur every 27 days (which happened, for example, on March 14), on March 19, for instance, a recurrence of the disturbance from February 22–23 was expected in vain. This was despite the presence of extensive coronal holes No. 31 and 33 in the center of the solar disk. .

However, it appears that the geomagnetic disturbance will arrive later. The same applies to the increase in solar activity, which will also arrive later, but still within the third decade of March. Although it will be smaller than it was during the previous solar rotation. Given the proximity of the equinox, however, both surges will still significantly affect shortwave ionospheric propagation.

F. K. Janda, A.R.S. OK1HH
http://ok1hh.nagano.cz/
Emails: ok1hh(at)crk.cz, ok1hh(at)rsys.cz