Solar activity forecast for the period March 27 - April 02, 2026

Activity level: low
X-ray background flux (1.0-8.0 A): in the range B7.5-C3.2
Radio flux (10.7 cm): a fluctuation in the range 126-174
Events: class C (0-9/day), class M (0-4/period), class X (0-1/period), proton (0-0/period)
Relative sunspot number (Ri): in the range 52-151

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

Geomagnetic activity forecast for the period March 27 - April 02, 2026

Quiet:  Mar 27 - 29, Apr 1 - 2
Unsettled: Mar 29 - 31
Active: Mar 30 - 31
Minor storm:   Mar 30
Major storm:  0
Severe storm: 0

Next days, we expect at most geomagnetic activity decrease to quiet and/or quiet to unsettled level.
An another activity increase is possible about Monday, March 30 when an active event or minor storm can occur.
About Tuesday, March 31, we expect at most unsettled conditions generally.
Last two days, about April 1 and April 2, we expect quiet to unsettled conditions return.
A following active episode is expected starting the next forecast period, about Friday, April 3.

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 27 - April 02, 2026

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

Although a decline in solar activity beginning in mid-March was expected, the anticipated increase began significantly later—in fact, not until March 25. The situation was similar with the Earth’s magnetic field activity, whose rise beginning on March 20 was also in line with expectations. However, the duration of the disturbance was twice as long as predicted, and its high intensity on March 22 was particularly surprising. At the same time, high solar wind speeds were observed, which began to gradually decrease only starting on March 23. Despite the intensity of the disturbances, shortwave propagation conditions were not as poor overall as we might have expected, a fact we can likely attribute to the favorable effects accompanying the equinox.

A drawback of the current pattern, which we are observing relatively shortly after the peak of the 11-year cycle, is the reduced reliability of forecasts. Nevertheless, it can be assumed that the current increased solar activity, combined with improved shortwave propagation conditions, will continue not only through the end of March but also into early April. Conversely, low solar activity can be expected in the second ten-day period of April, and a recurrence of disturbances beginning in mid-April is very likely.

F. K. Janda, A.R.S. OK1HH
http://ok1hh.nagano.cz/
Emails: ok1hh(at)crk.cz, ok1hh(at)rsys.cz
Pmail: OK1HH(at)OK0NAG.#BOH.CZE.EU