Solar activity forecast for the period April 14 - April 20,
2017
Activity level: mostly very low to low
X-ray background flux
(1.0-8.0 A): in the range A4.0-B2.0
Radio flux (10.7 cm): a fluctuation in
the range 60-95 f.u.
Events: class C (0-3/day), class M (0-1/period), class X
(0/period), proton (0/period)
Relative sunspot number (Ri): in the range
0-75
Tomas Blaha
RWC Prague, Astronomical Institute, Solar Dept.,
Ondrejov, Czech Republic
e-mail: sunwatch(at)asu.cas.cz
Geomagnetic
activity forecast for the period April 14 - April 20, 2017
Quiet: Apr
14 - 16
Unsettled: Apr 16 - 20
Active: Apr 17 - 18
Minor storm:
unlikely Apr 17
Major storm: 0
Severe storm: 0
Geomagnetic activity
summary:
The first half of forecasted period, we expect quiet to
unsettled
conditions. About the Easter Monday, April 17, an active episode
is
possible. Nevertheless, we expect the Local K-index maximum at
K=4,
storming episode is unlike.
The active episode can continue to April
18 - 19, then, we expect quiet to
unsettled conditions return.
Tomas
Bayer
RWC Prague
Institute of Geophysics of the ASCR, Prague
Department
of Geomagnetism
Budkov observatory (BDV)
Geomagnetic activity forecast
for the period April 14 - May 9, 2017
Geomagnetic field will
be:
quiet on April 16, 20 - 22, 30, May 5, 9 - 10
mostly quiet on April 14
- 15, 21, May 3 - 4, 6
quiet to unsettled April 19, 29, May 1, 2, 7,
8
quiet to active on April 23, 25 - 28
active to disturbed on April 17 -
18, 24
Amplifications of the solar wind from coronal holes are
expected
on April (15,) 16 - 19, 24 - 27
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
