Farside Explosion reaches Earth

Imagine an explosion on the farside of the sun so powerful, we could feel it here on Earth. It happened on July 13th. The debris emerged in a circular cloud known as a ‘halo CME. When space weather forecasters first saw this explosion, there was a moment of excitement. It appeared to be heading directly toward Earth. However, data from NASA’s STEREO-A spacecraft indicated otherwise. The CME was heading directly away from us–a farside event.
Now for the interesting part: Although the explosion occurred on the farside, separated from Earth by the massive body of the sun, it still peppered our planet with high-energy particles. The Energetic and Relativistic Nuclei and Electron (ERNE) detector onboard SOHO recorded a surge in radiation not long after the CME appeared.
How did this radiation reach Earth? Rami Vainio, a professor of space physics at the University of Turku (Finland), who works with ERNE data says “it’s not possible to answer that question definitely without a detailed analysis involving multiple spacecraft.” However, she speculates that the lift-off of the CME may have created a global shock wave on the farside of the sun. Particles spilling over the edge might have spiraled toward our planet.
Of particular interest are the green data points (51 to 100 MeV). These are the most energetic protons ERNE can detect. An uptick in green after the CME indicates unusually “hard” radiation—the kind accelerated in the leading ed8ge of a fast-moving CME.
The source of the blast might have been the same sunspot (AR2838) that produced the first X-flare of Solar Cycle 25 on July 3rd. That sunspot is currently transiting the farside of the sun approximately where the CME came from. Within the next week AR2838 is expected to return–and then, maybe, the real fun begins. Stay tuned!

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Charles M0OXO

I was born in the 1960’s and have lived all my life in the Coal Mining Town of Barnsley in South Yorkshire, Northern England. My parents were all from this area of Yorkshire and my father worked in the main Industry of the local Collieries as a face worker. I have been married to my wife Debbie for 35+ years and we have two children and two grandchildren.

I have been licensed for around 20 years after my interest was re-kindled when I retired from my role as a Police Officer within South Yorkshire Police Force. The latter few years were spent as Radio Operator in the Force Operations Control Room at Sheffield, before my career ended.

IOTA chasing is (and always has been) my real passion, as climbing the ladder to reach Honour Roll status was always my main aim. The 1000 Islands Trophy is still out of reach but I am heading in the right direction. I am currently a Board Member of IOTA Ltd and IREF.

In my free time I am a keen Photographer of Wildlife, Aviation, (anything really) but the QSL Manager role is my main passion within Ham Radio.