[ips-sf] SWS Summary Forecast for 21 April - issued 0007UT/21-Apr-2018 [SEC=UNCLASSIFIED]

[rwc]

Very low solar activity is expected for today, 21 April. The solar
wind speed is currently under the influence of a high speed solar wind
stream from a recurrent coronal hole. The solar wind speed is at
strong to very strong levels. Geomagnetic activity is expected to be
at unsettled to active levels. Isolated minor storm periods may occur
if sustained southward Bz conditions occur. If this geomagnetic
activity occurs, auroras may be visible for southernmost Australian
regions (e.g. Tasmania and the coastline of Victoria) during local
nighttime hours. High-frequency radio communications may experience
minor to moderate MUF depressions.

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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