A sharp gust of solar wind hit Earth's magnetosphere today, and sparked the strongest geomagnetic storm of the year -

A sharp gust of solar wind hit Earth's magnetosphere today, and sparked the strongest geomagnetic storm of the year -

GEOMAGNETIC STORM: A sharp gust of solar wind hit Earth's magnetosphere today, April 5th, at approximately 0800 UT and sparked the strongest geomagnetic storm of the year (Kindex=7). Although the storm is subsiding now, it is not over. High-latitude sky watchers should remain alert for auroras. [gallery].