Here is the current forecast discussion on space weather and...

Here is the current forecast discussion on space weather and geophysical activity, issued 2017 May 30 1230 UTC.

Solar Activity

24 hr Summary: Solar activity decreased to very low levels. There were no spotted regions on the visible disk. Several B-class flares were observed during the period from an area of plage near N12E25. No Earth-directed CMEs were observed in available coronagraph imagery.

Forecast: Solar activity is expected to be at very low levels throughout the forecast period (30 May-01 Jun). A chance remains for an isolated C-class flare on 30 May as Region 2659 rotates around the west limb.

Energetic Particle

24 hr Summary: The greater than 2 MeV electron flux was at normal to moderate levels this period. The greater than 10 MeV proton flux remained at background levels throughout the period.

Forecast: The greater than 2 MeV electron flux is expected to be at normal to moderate levels on day one (30 May) with the potential to reach moderate to high levels by days two and three (31 May-01 Jun). This increase is in response to the enhanced near-Earth solar wind environment associated with the passage of the 23 May CME. The greater than 10 MeV proton flux is expected to persist at background levels throughout the forecast period (29-31 May).

Solar Wind

24 hr Summary: Solar wind parameters, as measured by the DSCOVR spacecraft, reflected continued but waning influences from the 23 May CME. Solar wind speeds gradually increased from near 400 km/s to 530 km/s during the summary period. Total field was elevated early to values near 15 nT, then gradually decreased to near 8 nT by the end of the period. The Bz component had a few periods of a sustained southward orientation, with a maximum value of -13. The phi angle was predominantly positive.

Forecast: Solar wind parameters are expected to gradually transition from the trailing end of the 23 May CME back towards nominal conditions by early on day one (30 May). Background solar wind parameters are expected on days two and three (31 May-01 Jun) with the return to a nominal solar wind regime.

Geospace

24 hr Summary: The geomagnetic field reached active conditions due to a sustained period of southward Bz.

Forecast: The geomagnetic field is expected to be at quiet to unsettled levels on day one (30 May) as CME effects wane. Generally quiet conditions are expected for days two and three (31 May-01 Jun) with the return of a nominal solar wind regime.

Don’t forget to visit our live space weather and radio propagation web site, at: http://ift.tt/17yXOGK

Live Aurora mapping is at http://ift.tt/2lYUS2h

If you are on Twitter, please follow these two users: + http://ift.tt/1iWH4ta + http://ift.tt/1wJXm19

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

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

from Ham Radio Times http://ift.tt/2qDIvXr
via IFTTT