Solar activity forecast for the period August 21 - 27, 2015
Activity
level: mostly low
X-ray background flux (1.0-8.0 A): in the range
B1.5-B7.0
Radio flux (10.7 cm): a fluctuation in the range 90-125
f.u.
Events: class C (0-12/day), class M (0-4/day), class X (0-1/period),
proton (0/period)
Relative sunspot number (Ri): in the range
10-85
Jozef Lesko
RWC Prague, Astronomical Institute, Solar Dept.,
Ondrejov, Czech Republic
e-mail:
sunwatch(at)asu.cas.cz
_________________________________________________________________________
Geomagnetic
activity forecast for the period August 21 - 27, 2015
At the night to
Friday, Aug 21, active episode is possible. Next two days,
we expect at most
quiet to unsettled geomgnetic conditions (the unsettled
stage is a little
more probable).
Starting at Monday, Aug 24, the unsettled conditons with an
active episode
are probable. We expect the active episode caused by pass of
coronal hole
at the Aug 24 or 25.
Tomas Bayer
Institute of
Geophysics ASCR
Budkov Geomagnetic Observatory
(BDV)
_________________________________________________________________________
Geomagnetic
activity forecast for the period August 21 - September 16,
2015
Geomagnetic field will be:
quiet on September 9 - 10
mostly
quiet on August 25, 31, September 1, 5 - 8, 11,
quiet to unsettled on August
21 - 22, 24, 29 - 30, September 12 - 15
quiet to active on August 23, 27 -
28, September 2 - 4, 16
active to disturbed on August (26), September
3
Amplifications of the solar wind are expected on August 23, 25 - 28,
September 1 - 4
Remarks:
- Reliability of predictions remains
reduced in present solar cycle phase.
- Parenthesis means lower probability
of activity enhancement.
Petr Kolman, OK1MGW
Czech Propagation
Interested Group
(OK1HH & OK1MGW, weekly forecasts since 1978)
e-mail:
kolmanp(at)razdva.cz
