[ips-sf] SWS Summary Forecast for 18 February - issued 2345UT/17-Feb-2017 [SEC=UNCLASSIFIED]

[rwc]

Solar activity was at very low levels during the UT day 17 February.
Solar wind stream stayed strong on this day due to the effect of a
recurrent coronal hole. This coronal hole effect is expected to keep
the solar wind stream strengthened for the next 2 days (18 and 19
February) with possible weakening to start from the 3rd day (20
February). Very low levels of solar activity are expected for the next
3 days (18-20 February) with a slight chance of C-class flares. Due to
the anticipated effect of the high speed solar wind stream from a
recurrent coronal hole, geomagnetic activity showed enhancements to
unsettled levels with isolated active periods on UT day 17 February.
Due to the effect of this coronal hole, geomagnetic activity may show
enhancements up to active levels on 18 and 19 February with the
possibility of gradual decrease in the activity through the UT day 20
February. MUFs were near monthly predicted values with slight
enhancements in the mid- and low-latitude regions on UT day 17
February. Minor MUF depressions were observed in the high-latitude
regions. Over the next two days (18-19 February), the high latitude
depressions are expected to extend into the mid latitude regions as
disturbed geomagnetic conditions associated with the coronal hole
persist.

Space Weather Services              email: asfc at bom.gov.au
Bureau of Meteorology
PO Box 1386                         WWW: http://www.sws.bom.gov.au
Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp-out.sws.bom.gov.au
tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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