Weekly forecast

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Forecast issued date:

Solar activity forecast for the period January 22 - January 28, 2021

Activity level: mostly very low
X-ray background flux (1.0-8.0 A): in the range A3.5 - A6.5
Radio flux (10.7 cm): a fluctuation in the range 72-80 f.u.
Events: class C (0-4/period), class M (0/period), class X (0/period),
proton (0/period)
Relative sunspot number (Ri): in the range 0-45

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

Geomagnetic activity forecast for the period January 22 - January 28, 2021

Quiet: Jan 22 - 24, 27 - 28
Unsettled: Jan 24 - 27
Active: unlikely Jan 25 - 26
Minor storm: 0
Major storm: 0
Severe storm: 0

Geomagnetic activity summary:
Next week, we expect at most quiet to unsettled conditions. The most 
unsettled episode is possible about Monday, January 25, and Tuesday, 
January 26. The other days, we expect at most quiet conditions only with 
an isolated unsettled event.

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

Geomagnetic activity forecast for the period January 22 - February 17, 2021

Geomagnetic field will be
quiet on: January 22, 28 - 30, February 4, 10
quiet to unsettled on: January 23, 27, February 5 - 6, 9 - 13, 17
quiet to active on: January 24 - 26, 31, February 1, 3, 7, 14 - 16
unsettled to active: February 2, 8
active to disturbed: -

Solar wind will intensify on: January (25 - 27, 31,)
February (1,) 2 - 3, (4, 8 - 10, 15 - 16).

Remarks:
- Parenthesis means lower probability of activity enhancement.
- Now the the predictability of changes is much lower than before,
  as there are very ambiguous indications.
- This forecast was made on the 21st day, the 21st year
  of the 21st century and is valid since 21:21 UTC.

F. K. Janda, OK1HH
(from Czech Propagation Interested Group
compiling this geomagnetic activity weekly forecasts since January 1978).
Emails: ok1hh(at)crk.cz, janda(at)planetum.cz
Pmail: OK1HH(at)OK0NAG.#BOH.CZE.EU

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