PROPAGATION

Solar Cycle 25 is Very Much Alive

TOMAS HOOD

So far, Solar Cycle 25 is outpacing the official predictions as we saw in April, which excited the ham radio community as the 10.7-cm radio flux daily readings peaked at 160, breathing life into the higher bands of the shortwave radio spectrum (also known as HF, for the high frequency segment of radio spectrum [3-30 MHz] –ed). Some spectacular moments occurred in April, including the strongest X-ray flare, which measured X2.2 (See scales in Figures 1a, 1b, and 1c), peaking at 03:57 UTC (Coordinated Universal Time) on April 20th. This erupted from a sunspot region, numbered as Active Region (AR) 2992, that was just rotating out of Earth’s view yet caused a radio blackout over the sunlit area of Earth, mostly over Asia during those hours. The effects from a…

You're reading a preview of

CQ Amateur Radio (Digital) - 1 Issue, May 2022

DiscountMags is a licensed distributor (not a publisher) of the above content and Publication through Zinio LLC. Accordingly, we have no editorial control over the Publications. Any opinions, advice, statements, services, offers or other information or content expressed or made available by third parties, including those made in Publications offered on our website, are those of the respective author(s) or publisher(s) and not of DiscountMags. DiscountMags does not guarantee the accuracy, completeness, truthfulness, or usefulness of all or any portion of any publication or any services or offers made by third parties, nor will we be liable for any loss or damage caused by your reliance on information contained in any Publication, or your use of services offered, or your acceptance of any offers made through the Service or the Publications. For content removal requests, please contact Zinio.