July 13, 2024

This Week in Amateur Radio

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Via the ARRL: The K7RA Solar Update

ASWFC GEOMAGNETIC DISTURBANCE WARNING ISSUED AT 0538UTC/28 JUNE 2024 BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE:

“A glancing blow from a recent CME is expected to arrive late on UT
day 28-Jun. Additional to this, solar wind parameter Bz has been
oriented southward for approximately 15 hours. Combined this may
induce G1 geomagnetic conditions. A second CME is expected to arrive
late on UT day 29-Jun and may also cause G1 geomagnetic conditions.

“INCREASED GEOMAGNETIC ACTIVITY EXPECTED DUE TO CORONAL MASS EJECTION FROM 28-29 JUNE 2024.”

Nine new sunspot groups emerged over this reporting week, June
20-26.

Two appeared on June 21, four on June 23, two more on June 25 and
one on June 26.

Average daily sunspot number declined from 149.6 to 141.6, but
average daily solar flux increased from 178 to 195.1.

Average planetary A index declined from 10.3 to 7.

Predicted solar flux for the near term is 182 on June 28-30, then
180, 185, 180, 175, and 190 on July 1-5, 180 on July 6-7, then 165,
165 and 180 on July 8-10, 170 on July 11-13, then 180, 190 and 195
on July 14-16, then 200 on July 17-18, 195 on July 19-20, 190 on
July 21-28, then 195, 190, 185 and 190 on July 29 through August 1,
and 180 on August 2-3.

Read more – via American Radio Relay League | Ham Radio Association and Resources http://www.arrl.org/news/view/the-k7ra-solar-update-834