NASA: Solar flare was first of most intense class observed this year

May 13, 2013 at 4:00 PM   |   Comments

GREENBELT, Md., May 13 (UPI) -- NASA says a solar flare emitted by the sun late Sunday was an "X-class" event -- the most intense flares -- and the first such "X" flare of the year.

Peaking at 10 p.m. EDT, the flare was accompanied by another solar phenomenon known as coronal mass ejection that can send solar material out into space.

This CME was not Earth-directed, the space agency said Monday.

Solar flares are powerful bursts of radiation, and while harmful radiation from a flare cannot pass through Earth's atmosphere to physically affect humans on the ground, if intense enough they can disturb the atmosphere in the layer where GPS and communications signals travel, causing radio blackouts.

The blackout associated with this flare has since subsided, NASA said.

"X-class" flares are given a number based on their strength; X2 is twice as intense as an X1, an X3 is three times as intense, and so forth.

NASA has classified Sunday's flare as an X1.7.

Increased numbers of flares are expected because the sun's normal 11-year activity cycle is ramping up toward solar maximum, which is expected this year, the space agency said.

© 2013 United Press International, Inc. All Rights Reserved. Any reproduction, republication, redistribution and/or modification of any UPI content is expressly prohibited without UPI's prior written consent.
Most Popular
Cape Cod scientists tag first great white shark of season
Dinosaurs shrank for 50 million years before becoming birds
Music helps cows relax, produce more milk
Five-minute video visualizes history of human culture
Thousands of velellas wash up on the shores of San Francisco
Trending News