Forecast Discussion

Product: Forecast Discussion Issued: 2018 Jul 31 0030 UTC Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
Solar Activity
.24 hr Summary… Solar activity was very low. An active region (S09E58) rotated further into view; visible as primarily an area of faculae. A small spot was observed by a pair of USAF optical observatories, however, we await one additional report of a still existent spot before assigning it as a NOAA/SWPC numbered region. No CMEs were observed in available coronagraph imagery.
.Forecast… Solar activity is expected to remain very low all three days (31 Jul-2 Aug).
Energetic Particle
.24 hr Summary… The greater than 2 MeV electron flux reached high levels; while the greater than 10 MeV proton flux continued at background values.
.Forecast… The greater than 2 MeV electron flux is expected to continue at moderate to high levels all three days (31 Jul-2 Aug) and the greater than 10 MeV proton flux is expected to remain at background levels.
Solar Wind
.24 hr Summary… Solar wind parameters were indicative of a slow regime. Total IMF strength ranged from 3 to 9 nT, as the total field experienced a few slight enhancements. The Bz component underwent primarily weak deviations, but turned southward later in the period. Solar wind speed ranged primarily from 275-325 km/s. The phi angle was predominantly negative.
.Forecast… A slow solar wind regime is expected to continue the next three days (31 Jul-2 Aug).
.24 hr Summary… The geomagnetic field was quiet.
.Forecast… The geomagnetic field is expected to remain quiet the next three days (31 Jul-2 Aug).
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