The solar storm of 1859 (also known as the Carrington Event)[1] was a powerful geomagnetic solar storm during solar cycle 10 (1855–1867). A solar coronal mass ejection (CME) hit Earth's magnetosphere and induced one of the largest geomagnetic storms on record, September 1–2, 1859. The associated "white light flare" in the solar photosphere was observed and recorded by British astronomers Richard C. Carrington (1826–1875) and Richard Hodgson (1804–1872). The now-standard unique IAU identifier for this flare is SOL1859-09-01.
https://en.wikipedia.org/wiki/Solar_storm_of_1859