[Propagation+Space Weather] Today's Space Weather Forecast Discussion on 2018 Dec 16 1230 UTC

[nw7us@sunspotwatch.com]

This e-mail posting is from the Radio Propagation Reflector that you're 
currently subscribed to.  Refer to the end of this e-mail for directions on how 
to change your subscription options, or to unsubscribe.
_______________________-start-_________________

Here is the current forecast discussion on space weather and geophysical activity, issued 2018 Dec 16 1230 UTC.

Solar Activity

24 hr Summary: Solar activity was very low. Only areas of plage remained on the solar disk. No Earth-directed CMEs were observed in available coronagraph imagery. Forecast: Solar activity is expected to be at very low levels on 16-18 Dec.

Energetic Particle

24 hr Summary: The greater than 2 MeV electron flux ranged from moderate to high levels reaching a peak flux of 1,270 pfu at 15/1900 UTC. The greater than 10 MeV proton flux remained at background values.

Forecast: The greater than 2 MeV electron flux is expected to be at moderate levels on 16 Dec due to weak CIR effects ahead of a CH HSS. Moderate to high levels are expected to return on 17-18 Dec. The greater than 10 MeV proton flux is expected to continue at background levels.

Solar Wind

24 hr Summary: Solar wind parameters, as measured by the DSCOVR spacecraft, reflected nominal conditions. Total magnetic field strength was below 5 nT. Solar wind speeds were mostly between 300-350 km/s. Phi angle transitioned from the negative sector to variable after 16/0000 UTC.

Forecast: A slightly enhanced solar wind environment is likely on 16-17 Dec due to weak negative polarity CH HSS effects. Nominal solar wind conditions are expected to return on 18 Dec.

Geospace

24 hr Summary: The geomagnetic field was quiet.

Forecast: The geomagnetic field is expected to reach unsettled conditions, with a chance of an isolated active period, on 16-17 Dec due to anticipated weak CH HSS influence. Quiet conditions are expected on 18 Dec.

Don't forget to visit our live space weather and radio propagation web site, at: http://SunSpotWatch.com/

Live Aurora mapping is at http://aurora.sunspotwatch.com/

If you are on Twitter, please follow these two users: + https://Twitter.com/NW7US + https://Twitter.com/hfradiospacewx

- - - - - - - - - - - - - Be sure to subscribe to our space weather and propagation email group, on Groups.io https://groups.io/g/propagation-and-space-weather Spread the word! - - - - - - - - - - - - - Links of interest: + Amazon space weather books: http://g.nw7us.us/fbssw-aSWSC + https://Twitter.com/NW7US + https://Twitter.com/hfradiospacewx Space Weather and Ham Radio YouTube Channel News: I am working on launching a YouTube channel overhaul, that includes series of videos about space weather, radio signal propagation, and more. Additionally, I am working on improving the educational efforts via the email, Facebook, YouTube, Tumblr, and other activities. You can help! Please consider becoming a Patron of these space weather and radio communications services, beginning with the YouTube channel: https://www.patreon.com/NW7US The YouTube channel: https://YouTube.com/NW7US ..

We're on Facebook: http://NW7US.us/swhfr

Live data: SunSpotWatch.com

_______________________________________________
Propagation mailing list
Propagation@contesting.com

To change your subscription settings, or to unsubscribe, visit:
http://lists.contesting.com/mailman/listinfo/propagation