[Propagation+Space Weather] Today's Space Weather Forecast Discussion on 2018 Mar 17 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 Mar 17 1230 UTC.

Solar Activity

24 hr Summary: Solar activity was very low. Region 2701 (S12, L=100) decayed to plage. No Earth-directed CMEs were observed in available coronagraph imagery.

Forecast: Solar activity is expected to continue at very low levels over the next three days (17-19 Mar).

Energetic Particle

24 hr Summary: The greater than 2 MeV electron flux reached high levels with a maximum flux of 13,800 pfu observed at 16/2110 UTC. The greater than 10 MeV proton flux was steady at background values.

Forecast: The greater than 2 MeV electron flux is expected to reach high levels each of the next three days (17-19 Mar) due to high speed winds associated with a CH HSS. The greater than 10 MeV proton flux is expected to remain at background levels throughout the forecast period.

Solar Wind

24 hr Summary: Solar wind parameters reflected the continued influence of a negative polarity CH HSS. Solar wind speed steadily increased from a minimum value of around 420 km/s to a peak of 524 km/s late in the period. Total field strength decreased from 12 nT early in the period to around 2-3 nT after 17/0300 UTC. The southward component of the magnetic field was sustained southward until around 17/0100, briefly reaching a peak of -12 nT. The phi angle was negative throughout the period.

Forecast: Solar wind parameters are expected to continue at enhanced levels on days one and two (17-18 Mar) as influence from a negative polarity CH HSS is expected to persist. Enhanced wind parameters are expected to gradually relax by day three (19 Mar) as CH HSS slowly wane.

Geospace

24 hr Summary: The geomagnetic field was unsettled and active this period under CH HSS influence.

Forecast: The geomagnetic field is expected to reach active levels on days one and two (17-18 Mar) under continued CH HSS influence. By day three (19 Mar), field activity is expected to decrease to quiet and unsettled levels as CH HSS influence wanes.

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