NASAのインスタグラム(nasa) - 2月5日 02時27分

Sun Emits Mid-Level Solar Flare: The sun emitted a mid-level solar flare, beginning at 11:57 p.m. EST on Feb. 3, 2014, and peaking at midnight EST. This image, captured by NASA's Solar Dynamics Observatory, shows the bright flare near the center of the sun.

Solar flares are powerful bursts of radiation. Harmful radiation from a flare cannot pass through Earth's atmosphere to physically affect humans on the ground, however -- when intense enough -- they can disturb the atmosphere in the layer where GPS and communications signals travel.

This flare is classified as an M5.2 flare.
Image Credit: NASA/SDO
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