Solar activity forecast for the period May 19 - May 25, 2017
Activity
level: mostly very low
X-ray background flux (1.0-8.0 A): in the range
A3.0-A9.5
Radio flux (10.7 cm): a fluctuation in the range 64-85
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
0-45
Tomas Blaha
RWC Prague, Astronomical Institute, Solar Dept.,
Ondrejov, Czech Republic
e-mail: sunwatch(at)asu.cas.cz
Geomagnetic
activity forecast for the period May 19 - May 25, 2017
Quiet: May 24
- 25
Unsettled: May 21 - 23
Active: May 17 - 20
Minor storm: May 19 -
20
Major storm: 0
Severe storm: 0
Geomagnetic activity
summary:
We still expect the active episode predicted to this day, i.e.
Thursday,
May 18. The active conditions with possible minor storm are
expected at
Friday, May 19, and, less probably, at Saturday, May 20. This
day, we
expect more probably unsettled to active conditions and the
active
episodes (K=4) should have isolated character only.
The last two
days (May 24-25), we expect return of quiet conditions. The
rest of the
forecasted period (May 21-23), we expect at most
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 May 19 -
June 14, 2017
Geomagnetic field will be:
quiet on June 1, 8
mostly quiet on May 29, June 4, 9, 12
quiet to unsettled May 23 - 28,
June 5 - 6, 10
quiet to active on May 21 - 22, June 3, 7, 11, 13
active
to disturbed on May 19 (- 20, 30 - 31,) June 2, 14 -> ?
Amplifications of the solar wind from coronal holes are expected
on
May 19 (20 - 21, 31,) June (5 - 6,) 9 (- 14)
Remark:
- Parenthesis
means lower probability of activity enhancement and/or
lower reliability of
prediction.
F. K. Janda, OK1HH
Czech Propagation Interested Group
OK1HH compiling weekly forecasts since 1978
e-mail: ok1hh(at)rsys.cz
