The
Carrington Event was the most intense
geomagnetic storm in recorded history, peaking from 1 to 2 September 1859 during
solar cycle 10. It created strong
auroral displays that were reported globally
[1] and caused sparking and even fires in multiple
telegraph stations. The geomagnetic storm was most likely the result of a
coronal mass ejection (CME) from the
Sun colliding with
Earth's magnetosphere.
The geomagnetic storm was associated with a very bright
solar flare on 1 September 1859. It was observed and recorded independently by British astronomers
Richard Christopher Carrington and
Richard Hodgson—the first records of a solar flare.
A geomagnetic storm of this magnitude occurring today would cause widespread electrical disruptions, blackouts, and damage due to extended outages of the electrical power grid.