Effects of a Carrington event equivalent in the 20th century

The so-called Carrington event, more properly known as the solar storm of 1859, induced one of the largest geomagnetic storms on record. See https://en.wikipedia.org/wiki/Solar_storm_of_1859 for more.

Obviously this happened while electric use was essentially confined to telegraphy. While no similar (in magnitude or scope!) impacts of a coronal mass ejection on earth have been recorded since, there have been other geomagnetic storms with lesser impacts since. However, suppose a Carrington event equivalent occurred:

  • Circa 1910: universal telegraphy; increasingly common telephones; beginnings of domestic electrification; widespread use of electricity for industry and mass transportation
  • Circa 1925: all of the above plus more widespread telephones and domestic electrification; beginnings of civilian and military radio use
  • Circa 1942: imagine the impacts during World War II, with the first uses of radar
  • Circa 1953: worst of the Cold War (the Bulletin of the Atomic Scientists set the Doomsday Clock at two minutes to midnight); universal telephones, electrification and radio; widespread TV; radar; beginnings of electronic computing
  • Circa 1962: at the Cuban Missile Crisis...
  • Circa 1984: latter-day coldest time of the Cold War (ironically, just a few years before the collapse of the Soviet Union)
What would be the immediate and ripple effects?
 
Eat hot Photons there Earth!

It's attention getting pre 1940, but not globally catastrophic. Some time in the 1940s or 50s it becomes a serious problem.
 
If you had it at the right time, you could provoke some serious interest in space. I'd be very interested in the results of a Carrington event-level storm occurring in the first three years you stated. Especially during World War II, since that would have quite an impact on the immediate course of the war.
 
If it occurred during the war everyone would first attribute it to the enemy. The truth would be understood fairly quickly, but wackos would to this day be searching for the secret nazi weapon.

DBWI: The second Carrington Event had not occurred in December 1942?
 
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