Weekly forecast

Solar activity forecast for the period June 18 - June 24, 2021

Activity level: mostly very low 
X-ray background flux (1.0-8.0 A): in the range A6.5-B1.1
Radio flux (10.7 cm): a fluctuation in the range 73-78
Events: class C (0/period), class M (0/period), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 0-45

Bozena Solarova
RWC Prague, Astronomical Institute, Solar Dept., Ondrejov, Czech Republic
e-mail: sunwatch(at)asu.cas.cz

Geomagnetic activity forecast for the period June 18 - June 24, 2021

Quiet: Jun 18 - 20, 24
Unsettled: Jun 21. 23 - 24
Active: Jun 22 - 23
Minor storm: possible Jun 22 - 23
Major storm: 0
Severe storm: 0

Geomagnetic activity summary:
Till this Sunday, June 20, we expect at most quiet conditions. At Monday, June 21, we expect quiet to unsettled conditions. 
The most active episode is expected at the end of currently forecasted period, i.e. about June 23 - 24. Within these days, 
a minor storming event is possible. The last day of current forecasted period, we expect geomagnetic activity decrease 
to quiet to unsettled conditions.

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

Geomagnetic activity forecast for the period June 18 - July 15, 2021

Geomagnetic field will be
quiet on: June 20, 24, 27 - 28, July 1, 10, 15
quiet to unsettled on: June 18 - 19, July 11, 14
quiet to active on: June 21, 23, 25 - 26, 29 - 30, July 2, 6 - 9
unsettled to active: (June 22, July 3 - 5, 12 - 13)
active to disturbed: -
 
Solar wind will intensify on: June (18 - 19,) 21,
(22 - 24, 29,) 30, July (2,) 3, 5, 10 - 11
 
Remarks:
- Parenthesis means lower probability of activity enhancement.
 
F. K. Janda, OK1HH
(from Czech Propagation Interested Group
compiling this geomagnetic activity weekly forecasts since January 1978).
Emails: ok1hh(at)crk.cz, ok1hh(at)rsys.cz
Pmail: OK1HH(at)OK0NAG.#BOH.CZE.EU
 

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