Weekly forecast

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Forecast issued date:

Solar activity forecast for the period September 13 - September 19, 2019

Activity level: mostly very low
X-ray background flux (1.0-8.0 A): in the range A5.5-A6.5
Radio flux (10.7 cm): a fluctuation in the range 66-68 f.u.
Events: class C (0/period), class M (0/period), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 0-25

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

Geomagnetic activity forecast for the period September 13 - September 19, 2019

Quiet: Sep 13 - 19
Unsettled: Sep 14 - 15, 18 - 19
Active: 0
Minor storm: 0
Major storm: 0
Severe storm: 0

Geomagnetic activity summary:
Next week, we expect quiet to unsettled conditions. The unsettled 
episode is expected about September 14 - 15, and then, at the end of of 
the forecasted period, i.e. September 18 - 19. We do not expect any 
active event next week.

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

Geomagnetic activity forecast for the period September 13 - October 09, 2019

Geomagnetic field will be
quiet on: September 14 - 16, 20 (- 21,) November 8 - 9
quiet to unsettled on: September 13, 17 - 19, 22, (24,) November 4 - 7
quiet to active on: September 23, 25, 30, November 1 - 3
unsettled to active on: September (26)
active to disturbed: September (27 - 29)

Solar wind will intensify on: September 16, (24 - 27,)
28 - 30. October 1 (- 4, 7 - 9)

Remarks:
- Parenthesis means lower probability of activity enhancement.
- The predictability of changes remains lower at present.

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

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