Solar storms are back, threatening life on Earth as we know it
A few days ago, millions of tons of super-heated gas shot off from the surface of the sun and hurtled 90 million miles toward Earth.
The eruption, called a coronal mass ejection, wasn’t particularly powerful on the space-weather scale, but when it hit the Earth’s magnetic field it triggered the strongest geomagnetic storm seen for years. There wasn’t much disruption this time — few people probably even knew it happened — but it served as a reminder the sun has woken from a yearslong slumber.