[ips-sf] IPS Summary Forecast for 18 August - issued 2345UT/17-Aug-2015

[rwc]

Solar flare activity was very low during 17 Aug UT and it is expected
to remain very low to low during the next 2 days. There is a small
chance of a C class flare. The solar wind speed was strong (500 to 600
km/s) during 17 Aug and is expected to remain strong today, 18 Aug. A
slow Coronal Mass Ejection (CME) associated with Disappearing Solar
Filament (DSF) launched on 14 Aug may glance the Earth later today.
Geomagnetic conditions may reach active levels if this CME arrives. A
large Coronal Hole (CH 683) is located in the solar Northern
Hemisphere. A high speed solar wind stream emanating from CH 683 may
impact Earth later this week and drive another episode of active
geomagnetic conditions. The ionospheric storm following the major
geomagnetic storm which commenced on 15 August continued during 17
Aug. Conditions for HF radio propagation were depressed during 17 Aug
and are expected to be even more depressed during 18 Aug. HF radio
operators should try using lower frequencies if possible.

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

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