The sun Fires off its Third 'Halo CME' in as many days - Electroverse


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Now for the interesting part, continues Dr Phillips…
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 that first 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, 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:


Looking at the above ERNE chart again, of particular interest are the green data points (51 to 100 MeV).
These are the most energetic protons ERNE can detect, explains Dr Phillips. An uptick in green after the CME indicates unusually “hard” radiation–the kind accelerated in the leading edge of a fast-moving CME.
The source of the blast is thought to have been the same sunspot (AR283 that produced the first X-flare of Solar Cycle 25 on July 3. 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 to face earth–and then, maybe, the real fun begins.

Also:

Spaceweather.com Time Machine


Cosmic ray dose rates peaked in late 2019, and have been slowly declining ever since. This makes perfect sense. Solar Minimum was in late 2019. During Solar Minimum the sun's magnetic field weakens, allowing more cosmic rays into the solar system. We expect dose rate to be highest at that time.


Now that Solar Minimum has passed, the sun is waking up again. Solar magnetic fields are strengthening, providing a stiffer barrier to cosmic rays trying to enter the solar system. The decline of cosmic radiation above California is a sign that new Solar Cycle 25 is gaining strength.


.Who cares? Cosmic rays are a surprisingly "down to Earth" form of space weather. They can seed clouds, trigger lightning, and penetrate commercial airplanes. According to a study from the Harvard T.H. Chan school of public health, crews of aircraft have higher rates of cancer than the general population. The researchers listed cosmic rays, irregular sleep habits, and chemical contaminants as leading risk factors. Somewhat more controversial studies (#1, #2, #3, #4) llink cosmic rays with cardiac arrhythmias and sudden cardiac death.


En route to the stratosphere, our sensors also pass through aviation altitudes:
In this plot, dose rates are expessed as multiples of sea level. For instance, we see that boarding a plane that flies at 25,000 feet exposes passengers to dose rates ~10x higher than sea level. At 40,000 feet, the multiplier is closer to 50x. The higher you fly, the more radiation you will absorb.