Weekly forecast

Forecast issued date:

Solar activity forecast for the period November 13 - November 19, 2026

Activity level: low to moderate
X-ray background flux (1.0-8.0 A): in the range B4.5-B8.5
Radio flux (10.7 cm): a fluctuation in the range: 115-140
Events: class C (3-10/day), class M (1-2/period), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 70-145

Karolina Knesplova
RWC Prague, Astronomical Institute, Solar Dept., Ondrejov, Czech Republic

Geomagnetic activity forecast for the period November 13 - November 19, 2026

Quiet:   Nov 13 - 15
Unsettled: Nov 15, 18 - 19
Active:  Nov 16 - 18
Minor storm: Nov 16 - 17
Major storm:  unlikely about Nov 17
Severe storm: 0

Next days, we expect at most quiet conditions till Sunday, November 15.
Starting the new week, we expect geomagnetic activity enhancement since Monday, November 16.
Thi day, and the following ones, a stroming event can occur.
The last day, we expect a partial activity decrease to at most 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 November 13 - November 19, 2026

Whilst a slower decline in the smoothed trend of solar activity was expected in September and October compared with the actual trend, the opposite is now the case. Sunspot activity is higher than expected, while class C solar flares are being observed more frequently, with occasional Class M flares as well. This has increased the likelihood of more rapid fluctuations in solar activity levels in the coming weeks. This should be accompanied by a decline in geomagnetic activity, although this may not begin until the third week of November, with disturbances following as early as the end of the month.

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

Receive Weekly Forecasts Bulletin

To receive Weekly Forecasts Bulletin via email, sign up for: sunwatch "at-sign" asu.cas.cz