By: Gordon Rutherford
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Product: Forecast DiscussionIssued: 2021 Jun 19 1230 UTCPrepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
Solar Activity
.24 hr Summary...Solar activity was very low. Region 2833 (N22W06, Hsx/alpha) was stableand quiet throughout the period and new Region 2834 (N20, L=281)decayed into a plage region. No Earth-directed CMEs were observed inavailable satellite imagery.
.Forecast...Solar activity is expected to be very low over 19-21 Jun.
Energetic Particle
.24 hr Summary...The greater than 2 MeV electron flux reached high levels with a peakflux of 4,740 pfu observed at 18/1445 UTC. The greater than 10 MeVproton flux was steady at background levels.
.Forecast...The greater than 2 MeV electron flux is expected to reach high levelsover 19-21 Jun and the greater than 10 MeV proton flux is expected topersist at background levels throughout the forecast period.
Solar Wind
.24 hr Summary...Solar wind parameters reflected diminishing negative polarity CH HSSinfluence this period. Solar wind speed values remained steady between475-525 km/s. Total field strength varied between 3-5 nT and Bzfluctuated between +3/-5 nT. The phi angle was negative and solar winddensity remained near 5 ppcm throughout the period.
.Forecast...Solar wind parameters are expected to be nominal over 19-21 Jun.
Geospace
.24 hr Summary...The geomagnetic field was quiet.
.Forecast... The geomagnetic field is expected to be mostly quiet over 19-21 Jun.
Works Cited
Product: Forecast Discussion
Issued: 2021 Jun 19 1230 UTC
Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
Solar Activity
.24 hr Summary...
Solar activity was very low. Region 2833 (N22W06, Hsx/alpha) was stable
and quiet throughout the period and new Region 2834 (N20, L=281)
decayed into a plage region. No Earth-directed CMEs were observed in
available satellite imagery.
.Forecast...
Solar activity is expected to be very low over 19-21 Jun.
Energetic Particle
.24 hr Summary...
The greater than 2 MeV electron flux reached high levels with a peak
flux of 4,740 pfu observed at 18/1445 UTC. The greater than 10 MeV
proton flux was steady at background levels.
.Forecast...
The greater than 2 MeV electron flux is expected to reach high levels
over 19-21 Jun and the greater than 10 MeV proton flux is expected to
persist at background levels throughout the forecast period.
Solar Wind
.24 hr Summary...
Solar wind parameters reflected diminishing negative polarity CH HSS
influence this period. Solar wind speed values remained steady between
475-525 km/s. Total field strength varied between 3-5 nT and Bz
fluctuated between +3/-5 nT. The phi angle was negative and solar wind
density remained near 5 ppcm throughout the period.
.Forecast...
Solar wind parameters are expected to be nominal over 19-21 Jun.
Geospace
.24 hr Summary...
The geomagnetic field was quiet.
.Forecast...
The geomagnetic field is expected to be mostly quiet over 19-21 Jun.
Works Cited
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