giovedì 21 luglio 2016

Weekly Forecasts Bulletin

Solar activity forecast for the period July 22 - July 28, 2016


Activity level: mostly very low to low
X-ray background flux (1.0-8.0 A): in the range A8.0-A4.0
Radio flux (10.7 cm): a fluctuation in the range 80-120 f.u.
Events: class C (0-8/day), class M (0-4/period), class X (0/period), proton (0/period)
Relative sunspot number (Ri): in the range 0-80

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

Geomagnetic activity forecast for the period July 22 - July 28, 2016


Quiet: Jul 23 - 27
Unsettled: Jul 22, 26 and 28
Active:  possible Jul 26
Minor storm: 0
Major storm:0
Severe storm: 0

Geomagnetic activity summary:
Solar wind velocity has currently decreasing course. After the last active
episode (at the midnight Jul 19/20, the local K-index reached at the
Budkov observatory value=5), we expect turning the geomagnetic conditions
to quiet to unsettled. About Jul 26, an isolated active episode is
possible. We do not expect storming events 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 July 22 - August 16, 2016


Geomagnetic field will be:
quiet on August 1, 13 - 14
mostly quiet on July 25, 28 - 29, August 11 - 12
quiet to unsettled on July 26, August 7, 16
quiet to active on July 22, 27, 30 - 31, August 2, 5 - 6, 8 - 9, 10, 15
active to disturbed on July 23 or 24, August 3 - 4

Amplifications of the solar wind from coronal holes are expected
on July 27 - 28, 30 - 31. AUgust 1 - 2, 7 - 8

Remark:
- Parenthesis means lower probability of activity enhancement.
- Reliability of predictions is reduced.

F. K. Janda, OK1HH
Czech Propagation Interested Group
(OK1HH & OK1MGW, weekly forecasts since 1978)
e-mail: ok1hh(at)rsys.cz