[Propagation+Space Weather] Today's Space Weather Forecast Discussion on 2018 Jul 20 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 Jul 20 1230 UTC.

Solar Activity

24 hr Summary: Solar activity was very low as the solar disk remains spotless. No Earth-directed CMEs were observed in available satellite imagery.

Forecast: Solar activity is expected to remain very low all three days.

Energetic Particles

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

Forecast: The greater than 2 MeV electron flux is expected to be at normal to moderate levels. The greater than 10 MeV proton flux is expected to continue at background levels.

Solar Wind

24 hr Summary: Solar wind parameters indicated the possible early onset of CH HSS effects from a recurrent, positive polarity coronal hole that is rotating toward the west limb. Solar wind velocities increased throughout the period from 375 to 450 km/s. Total field was steady near 5 nT and Bz was variable. The phi angle was positive.

Forecast: Solar wind parameters are expected to continue to reflect positive polarity coronal hole influences for days one and two (20-21 Jul). Solar wind velocities less than 500 km/s are expected and total field strength less than 15nT are forecast based on recurrence. Late on day three (22 Jul), a solar sector boundary crossing, phi transition from positive to negative orientation and increased density all associated with the CIR prior to the a negative polarity CH HSS are expected.

Geospace

24 hr Summary: The geomagnetic field was mostly quiet, with an isolated period of unsettled levels.

Forecast: The geomagnetic field is expected to be quiet to active on day one (20 Jul) due to continued onset of positive polarity CH HSS effects. Quiet to unsettled levels are expected to persist through day two (21 Jul). Late on day three (22 July), onset of disturbances to the magnetic field are expected to begin, with levels forecast to reach active conditions from a CIR prior to an expected, recurrent, negative polarity coronal hole.

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