Space Weather Forecast Discussion
| Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center |
| Issued: 2019 Jul 18 1230 UTC |
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| Solar activity remained very low. No Earth-directed CMEs were observed
in available coronagraph imagery. |
| Solar activity is expected to remain very low 18-20 Jul. |
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| The greater than 2 MeV electron flux reached high levels. The greater
than 10 MeV proton flux remained at background values. |
| The greater than 2 MeV electron flux is expected to continue at moderate
to high levels 18-19 Jul before decreasing to normal to moderate levels
on 20 Jul as |
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| Solar wind parameters reflected a return to near background conditions.
Solar wind speeds decreased from ~450 km/s to near 395 km/s, total field
strength averaged near 4 nT, and the Bz component averaged around +/- 3
nT. The phi angle was positive until 17/1800 UTC when it shifted into a
negative position, then rotated back to positive after 18/0842 UTC. |
| The solar wind environment is anticipated to remain at mostly background
levels on 18-20 Jul, with a chance for isolated minor enhancements, due
weak influences from CH HSS proximity. |
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| The geomagnetic field was quiet. |
| The geomagnetic field is expected to remain mostly quiet, with a
chance for occasional unsettled conditions, on 18-20 Jul in response to
isolated enhancements in the solar wind. |
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