55 citations · 103 across the 3 of their papers we have counts for
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astro-ph.SR2024★ 18 cited
The Extreme Space Weather Event of 1872 February: Sunspots, Magnetic Disturbance, and Auroral Displays
Hisashi Hayakawa, Edward W. Cliver, Frédéric Clette +19
We review observations of solar activity, geomagnetic variation, and auroral visibility for the extreme geomagnetic storm on 1872 February 4. The extreme storm (referred to here as…
astro-ph.SR2020★ 30 cited
The Dalton Minimum and John Dalton's Auroral Observations
Sam M. Silverman, Hisashi Hayakawa
In addition to the regular Schwabe cycles of approximately 11 y, "prolonged solar activity minima" have been identified through the direct observation of sunspots and aurorae, as w…