Propagation
[Top] [All Lists]

[Propagation+Space Weather] Today's Space Weather Forecast Discussion on

To: propagation@contesting.com
Subject: [Propagation+Space Weather] Today's Space Weather Forecast Discussion on 2017 Dec 18 1230 UTC
From: nw7us@sunspotwatch.com
Reply-to: Practical radio-wave propagation and space weather <propagation@contesting.com>
Date: Mon, 18 Dec 2017 20:07:10 +0000
List-post: <mailto:propagation@contesting.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 2017 Dec 18 1230 UTC.

Solar Activity

24 hr Summary: Solar activity was very low. The solar disk remained spotless. There were no Earth-directed CMEs observed in available satellite imagery.

Forecast: Solar activity is expected to continue at very low levels over the next three days (18-20 Dec).

Energetic Particles

24 hr Summary: The greater than 2 MeV electron flux was at normal to high levels with a peak flux of 2,658 pfu observed at 18/0835 UTC. The greater than 10 MeV proton flux remained at background levels.

Forecast: The greater than 2 MeV electron flux is expected to reach high levels on days one through three (18-20 Dec) in response to elevated wind speeds from a recurrent CH HSS. The greater than 10 MeV proton flux is expected to continue at background levels throughout the forecast period.

Solar Wind

24 hr Summary: Solar wind parameters indicated influence from a recurrent, positive polarity CH HSS. Wind speeds averaged about 610 km/s through the period with a maximum speed of 671 km/s observed at 18/0329 UTC. Total field (Bt) achieved a maximum of near 11 nT while the Bz component was variable between +/-8 nT. Phi was oriented in a positive solar sector throughout the period.

Forecast: The solar wind environment is expected to continue at elevated levels for the duration of the forecast period (18-20 Dec). An additional enhancement is possible late on day two (19 Dec) due to glancing blow impacts from the 15 Dec CME.

Geospace

24 hr Summary: The geomagnetic field was at unsettled to G1 (Minor) storm levels due to influence from a recurrent, positive polarity CH HSS.

Forecast: The geomagnetic field is expected to be at unsettled to G1 (Minor) storm levels on days one and two (18-19 Dec) under persistent CH HSS effects. Quiet to active conditions are expected on day three (20 Dec) due to combined influence from residual CH HSS effects and potential glancing blow impact from the 15 Dec CME.

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

Check out the stunning view of our Sun in action, as seen during the last five years with the Solar Dynamics Observatory (SDO): https://www.youtube.com/watch?v=zXN-MdoGM9g

-=-=-=-=-=-

What's the difference between CB & amateur (ham) radio? Here ia a video with an opinion by our curator, Tomas (amateur radio operator, NW7US): Did NCIS TV Show Malign the Amateur Radio Service? https://www.youtube.com/watch?v=pIWJ7kKbxiM?t=1m33s

-=-=-=-=-=-

If you are on Twitter, please follow these two users:

+ https://Twitter.com/NW7US + https://Twitter.com/hfradiospacewx

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



Today's Space Weather Forecast Discussion - 2017 Dec 18 20:07 UTC

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
<Prev in Thread] Current Thread [Next in Thread>