[Propagation+Space Weather] Today's Space Weather Forecast Discussion on 2018 May 11 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 May 11 1230 UTC.

Solar Activity

24 hr Summary: Solar activity remained at very low levels. Region 2709 (N05E38, Axx/alpha) was quiet and stable. No Earth-directed CMEs were observed in available coronagraph imagery.

Forecast: Solar activity is expected to remain at very low levels all three days (11-13 May).

Energetic Particle

24 hr Summary: The greater than 2 MeV electron flux reached very high levels with a peak flux of 74,279 pfu observed at 10/2050 UTC. The greater than 10 MeV proton flux was at background levels.

Forecast: The greater than 2 MeV electron flux is expected to be at high to very high levels on days one through three (11-13 May) due to CH HSS influences. The greater than 10 MeV proton flux is expected to continue at background levels for the forecast period.

Solar Wind

24 hr Summary: Solar wind parameters, as measured by the DSCOVR spacecraft, indicated waning influence from a CH HSS. Solar wind speeds gradually decreased from around 575 km/s to near 475 km/s by the periods end. Total magnetic field strength was below 5 nT until 11/0300 UTC, when an increase to a peak of 9 nT by 11/0750 UTC. The Bz component was primarily southwards with a maximum negative value of -5 nT at 11/0539 UTC. Phi was predominantly in the negative sector.

Forecast: Solar wind parameters are expected to continue to decrease towards nominal conditions with an ambient solar wind regime expected by day two (12 May).

Geospace

24 hr Summary: The geomagnetic field was at quiet to active levels under diminishing CH HSS activity.

Forecast: The geomagnetic field is expected to be at quiet to active levels on day one (11 May) as CH HSS effects slowly wane. A return to mostly quiet conditions is expected on days two and three (12-13 May).

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

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