March 19-24, 2001 Aurora Gallery The action began Monday, March 19th, when a coronal mass ejection from the Sun hit
Earth’s magnetosphere. Three days later on Thursday, March 22nd, a weak interplanetary shock wave –the leading edge of a
coronal mass ejection that left the Sun on March 19th– buffeted Earth’s magnetosphere. The impact
sparked a period of high-latitude auroras that dazzled Alaskans and other northerners.