Examples of Space Weather Events
- September 2, 1859, largest geomagnetic storm of last 200 years with widespread disruption of telegraph service.
- January 20, 1994, a geomagnetic storm temporarily disabled two Canadian communication satellites, Aniks E1 and E2 and the international communication satellite Intelsat K.
- January 7, 1997, a Coronal Mass Ejection hit the Earth's magnetosphere on January 10 and caused the loss of the AT&T Telstar 401 communication satellite (a $200 million value).
- May 15–16, 1921, one of the largest geomagnetic storms caused the entire signal and switching system of the New York Central Railroad below 125th street in New York City to be put out of operation. Worldwide disruption of telegraph service.
- August 7, 1972, a large Solar Energetic Particles events occurred. If astronauts had been in space at the time, the dose would have been deadly or at least life-threatening. Fortunately, this large event happened between the Apollo 16 and Apollo 17 lunar missions.
- October 19, 1989, a large solar event included the full array of space weather effects: Solar Energetic Particles, Coronal Mass Ejection, Forbush decrease, ground level enhancement, geomagnetic storm, etc..
- April 21, 2002, the Nozomi Mars Probe was hit by a large Solar Energetic Particles event which caused large-scale failure. The mission, which was already about 3 years behind schedule, was eventually abandoned in December 2003.
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