May 1921 geomagnetic storm (may 13, 1921 – may 15, 1921)
Description:
The three-day May 1921 geomagnetic storm, also known as the New York Railroad Storm, was caused by the impact of an extraordinarily powerful coronal mass ejection on Earth's magnetosphere. It occurred on 13–15 May as part of solar cycle 15, and was the most intense geomagnetic storm of the 20th century.Added to timeline:
Date:
may 13, 1921
may 15, 1921
~ 2 days