Solar activity forecast for the period August 11 - August 17, 2017
Activity level: mostly very low
X-ray background flux
(1.0-8.0 A): in the range A3.0-A8.5
Radio flux (10.7 cm): a fluctuation in
the range 66-78 f.u.
Events: class C (0-2/period), class M (0/period), class
X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range
RWC Prague, Astronomical Institute, Solar Dept.,
Ondrejov, Czech Republic
activity forecast for the period August 11 - August 17, 2017
Aug 11 - 12, 16 - 17
Unsettled: Aug 12 - 14, 17
Active: Aug 12 -
Minor storm: unlikely Aug 13
Major storm: 0
Geomagnetic activity summary:
Currently, local geomagnetic field is
We expect quiet to unsettled conditions till Saturday, August 12.
of this day, the active event can start. Sunday, August 13, we
most unsettled conditions with possible active event. Monday,
we expect at most unsettled conditions and geomagnetic activity
to quiet to unsettled conditions. This level is expected to the end
current forecasted period.
of Geophysics of the ASCR, Prague
Department of Geomagnetism
Geomagnetic activity forecast for the period August 11
- September 6, 2017
Geomagnetic field will be:
quiet on August 15
- 16, 25 - 27, 29
mostly quiet on August 11, 28, 30, September 5 - 6
quiet to unsettled August 21, 24, September 3 - 4
quiet to active on
August 12, 14, 17 - 23, 31
active to disturbed on August 13, September 1 - 2
Amplifications of the solar wind from coronal holes are expected
August 14 - 23, 28, 30 - 31.
- Parenthesis means lower
probability of activity enhancement
and/or lower reliability of prediction.
- A next our Geomagnetic activity forecast will be issued on
because of the author's participation on the expedition.
Contrary to the
ancient times when our publishing began, there
are other relatively reliable
and usable resources today.
F. K. Janda, OK1HH
OK1HH compiling weekly forecasts since January 1978