Forecast Discussion

Product: Forecast Discussion Issued: 2018 Jul 30 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. No Earth-directed CMEs were observed in available satellite imagery.
.Forecast… Solar activity is expected to remain very low all three days (30 Jul-01 Aug).
Energetic Particle
.24 hr Summary… The greater than 2 MeV electron flux reached high levels with a maximum flux of 3,180 pfu observed at 29/2035 UTC. The greater than 10 MeV proton flux remained at background values.
.Forecast… The greater than 2 MeV electron flux is expected to reach high levels on days one and two (30-31 Jul) and decrease to moderate levels on day three (01 Aug). The greater than 10 MeV proton flux is expected to continue at background levels.
Solar Wind
.24 hr Summary… Solar wind parameters, as measured by the DSCOVR spacecraft, reflected mostly nominal conditions. A slight enhancement in total magnetic field strength to a peak of 7 nT was observed after 29/1920 UTC. Wind speeds remained slow, ranging from 272-335 km/s. Phi angle was predominantly oriented in the negative sector.
.Forecast… A nominal solar wind environment is expected to persist over the next three days (30 Jul-01 Aug).
Geospace
.24 hr Summary… The geomagnetic field was at quiet levels.
.Forecast… The geomagnetic field is expected to be at mostly quiet levels for the forecast period (30 Jul-01 Aug).
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