20 YEARS AGO, AN EXTREME GEOMAGNETIC STORM: 20 years ago today, a powerful CME slammed into Earth's magnetosphere, sparking an extreme geomagnetic storm. Bright auroras were seen as far south as Houston, Texas, and San Diego, California. Technological systems avoided damage mainly because a second CME arrived later in the day and, ironically, turned the storm off before it could grow any stronger.

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Can't post the link to the full story but you can find it in the spaceweather link