The Solar Minimum Superstorm of 1903

Spaceweather.com

July 29, 2020: Don’t let Solar Minimum fool you. The sun can throw a major tantrum even during the quiet phase of the 11-year solar cycle. That’s the conclusion of a new study published in the July 1st edition of the Astrophysical Journal Letters.

“In late October 1903, one of the strongest solar storms in modern history hit Earth,” say the lead authors of the study,  Hisashi Hayakawa (Osaka University, Japan) and Paulo Ribeiro (Coimbra University, Portugal). “The timing of the storm interestingly parallels where we are now–near Solar Minimum just after a weak solar cycle.”

redlineAbove: The red line marks the 1903 solar superstorm in a plot of the 11-year solar cycle. [ref] The 1903 event wasn’t always recognized as a great storm. Hayakawa and colleagues took an interest in it because of what happened when the storm hit. In magnetic observatories around the world, pens…

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