[Propagation+Space Weather] Today's Space Weather Forecast Discussion on 2019 Sep 25 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 2019 Sep 25 1230 UTC.

Solar Activity

24 hr Summary: Solar activity was very low and the visible disk remained spotless. No Earth-directed CMEs were observed in available coronagraph imagery.

Forecast: Solar activity is expected to be very low 25-27 Sep.

Energetic Particle

24 hr Summary: The greater than 2 MeV electron flux was normal and the greater than 10 MeV proton flux continued at background values.

Forecast: The greater than 2 MeV electron flux is expected to be at normal to moderate levels 25-27 Sep and the greater than 10 MeV proton flux is expected to remain at background levels.

Solar Wind

24 hr Summary: Solar wind parameters were indicative of an enhanced solar wind environment, likely associated with the onset of a negative polarity CH HSS. Early in the period, total field strength ranged from 2nT to 17 nT, the Bz component fluctuated between -9 nT and +15 nT, the wind speeds increased from 350 km/s to 490 km/s, and the phi angle moved from a mostly positive orientation into a negative position. At approximately 24/2200 UTC, the solar wind environment appeared to stabilize somewhat, with total field returning to average near 4 nT, Bz remained around 1 nT, and wind speeds persisted near 500 km/s. Phi angle was primarily negative, with isolated oscillations into the positive sector.

Forecast: The solar wind environment is expected to continue to reflect weak CH HSS influence on 25 Sep, with a return to a more ambient, background-like state anticipated by 26 Sep. A CIR ahead of a recurrent, isolated, positive polarity CH HSS is likely to arrive later on 27 Sep, with increased enhancements in the solar wind environment likely.

Geospace

24 hr Summary: The geomagnetic field was quiet to unsettled with an isolated active period.

Forecast: The geomagnetic field is expected to be quiet to unsettled, with a chance for an isolated active period, on 25 Sep as negative CH HSS influence persists. Mostly quiet to unsettled levels are expected on 26 Sep and for most of 27 Sep. However, active to G1 (Minor) storm levels are likely later in the day on 27 Sep with the arrival of an anticipated CIR.

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