Read previewFor the first time in 20 years, NOAA has issued a G4 geomagnetic storm warning. NOAAAnd in the last 24 hours, AR3664 spit out four coronal mass ejections that are now hurtling toward Earth at roughly 560 miles per second, Owens told BI. Even states including Maryland, New York, and Pennsylvania, could catch a glimpse of the aurora low on the horizon, Young told BI. The reality is that we just won't know how bright, active, and wide-reaching the aurora will be until the coronal mass ejections reach Earth's atmosphere. The most extreme estimate of aurora and where they can be seen in the US came from Alex Young.

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Persons: —, G4s, They've, Matt Owens, Alex Young, NASA Goddard's, Owens, AR3664, Space.com, Young, they'll, Andrew Gerrard Organizations: Service, NOAA, University of Reading, NASA, NASA Goddard's Heliophysics, Business, Oceanic Atmospheric Administration, Earth, New Jersey Institute of Tech Locations: Montana , North Dakota , Minnesota , Wisconsin, Michigan, Maryland , New York, Pennsylvania