One way solar scientists measure the intensity of geomagnetic storms is with the Disturbance storm time index, labeled D st.

Are the Northern Lights dangerous? Solar storms in May and October saw intense displays of aurora borealis across the U.S.

Americans from Arizona to Delaware got a look at the northern lights on Oct. 10 as a result of a geomagnetic storm impacting ...

This, Blazek says, is a geomagnetic storm. Blazek, who specializes in astrophysics ... damage or knock out satellites or produce a strong current within wires that cause them to blow out or ...

Geomagnetic storming of this magnitude is common on NOAA’s 5-level scale. However, several sunspot regions on the Sun are ...

A G4 (Severe) geomagnetic storm is underway and aurora are visible from Europe and the U.K. It could mean northern lights for U.S. states down to California and Alabama.

The aurora borealis could be seen as far south as Alabama and California on Thursday night, and the surge of solar particles could extend into Friday too.

The event could cause glowing in the atmosphere and damage electrical infrastructure when it arrives, but we won't know the severity of the event until it's near.

This last geomagnetic storm made the lights visible as far south ... Notice however that the number of actual observed sunspots has exceeded the current forecast based on historical averages ...

Maruca said the sun is headed towards a solar maximum in the current cycle, meaning there could be more geomagnetic storms in the coming months. This is the second time this year the northern ...