SolarHam.com - Older News Archive (December 2018)

December 28, 2018 @ 14:25 UTC
Minor Storm Observed
Early this morning a minor (G1) geomagnetic storm was observed thanks to a high speed coronal hole stream moving past Earth above 550 km/s. Additional periods of enhanced activity will remain possible during the next 24 hours while the stream is geoeffective.

December 24, 2018 @ 20:40 UTC
Aurora Watch to End 2018
Good afternoon and I hope everybody is having a good Christmas Eve. Recurrent Coronal Hole #61 will begin to face Earth during the next few days and a solar wind stream is expected to reach our planet by the end of the week. Perhaps some nice high latitude aurora displays to close out 2018. More updates whenever necessary. Image by SDO/AIA.

Merry Christmas!

December 8, 2018 @ 15:30 UTC
Coronal Hole Stream / Aurora Watch
The anticipated coronal hole stream is now moving past Earth near 600 km/s. Isolated periods of enhanced geomagnetic activity will be possible at higher latitudes. Sky watchers should be alert for visible aurora once dark outside.

December 5, 2018 @ 21:00 UTC
New Sunspot
A rare sight during the descent into solar minimum, a new sunspot. Region 2729, a member of weakening Solar Cycle 24, formed fairly quickly in the southwest quadrant and is currently producing very minor B-Class solar flares. Although noteworthy solar flares are not expected, the sunspot should be monitored during the next 24 hours. Image below by SDO/HMI.

December 4, 2018 @ 01:45 UTC
Another Chance for Storming
The current coronal hole stream failed to generate a geomagnetic storm and only produced slightly enhanced activity at higher latitudes. A larger coronal hole (#54) will come into play this weekend (Dec 8 and 9) and should be the source of a high speed solar wind stream. Another chance for minor (G1) storming possible.

It should be noted that a weak coronal mass ejection (CME) observed on November 30th is predicted to pass Earth on December 5th and contribute to further enhancements. I personally don't think this will materialize, but perhaps I will be wrong. More updates will be added whenever necessary.

December 1, 2018 @ 00:20 UTC
Geomagnetic Storm Watch (UPDATED)
A coronal hole stream is expected to reach Earth on Saturday. Minor (G1) geomagnetic storming ispredicted for the next 24-48 hours once the solar wind stream reaches our planet. Aurora sky watchers should be alert this weekend.

UPDATE: The solar wind speed is slowly approaching 400 km/s on Saturday. A further increase will be likely during the next 12 hours.

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Dec 01 1725 UTC
Valid To: 2018 Dec 02 0600 UTC
Warning Condition: Onset