Your phone just sounded an alarm. Don't panic.

Tech Insider
A photo of the emergency alert notification test expected on October 4, 2023.
Smartphones across America will receive a scheduled test of the emergency alert system on Oct. 4 at about 2:20 p.m. EST.

FEMA Puerto Rico

13 times solar storms caused freak events on Earth, from detonating mines to crashing financial markets

Tech Insider
A flare is shown on the surface of the sun.
This image captured by NASA's Solar Dynamics Observatory on June 20, 2013 shows the bright light of a solar flare on the left side of the sun.

NASA/SDO

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