Solar Flare -- two will reach earth on March 8 early a.m. - NPR overview

from "Morning Edition" (NPR dot-org: March 8, 2012):

The sun ejected two huge solar flares Tuesday, and NASA says that we here on Earth may notice the effects of magnetic fields and ionized gases that it estimates will arrive around 1:25 a.m. ET Thursday. So, if you detect some electronic interference — say, your GPS doesn't work right — blame it on the sun.
In NASA's video of the mass ejections of solar matter, they look powerful, even angry — like massive solar blisters. As NASA says, "One of the most dramatic features is the way the entire surface of the sun seems to ripple with the force of the eruption."
The flares took place about an hour apart. And when they hit Earth, the waves of magnetic fields may disrupt power grids, as well as radio-based communications.
But the phenomenon might also bring auroras to the skies above residents of the northern United States, according to an interview with NASA solar physicist Alex Young, in the L.A. Times.
The space agency says that Tuesday's biggest flare was the second-largest since 2006. Here's more of a description of the two Coronal Mass Ejections, from NASA :

"NASA models using data from the Solar Terrestrial Relations Observatory (STEREO) and the Solar Heliospheric Observatory (SOHO) have now provided more information about the two CMEs associated with the two March 6 flares."
"The first is traveling faster than 1300 miles per second; the second more than 1100 miles per second. NASA's models predict that the CMEs will impact both Earth and Mars, as well as pass by several NASA spacecraft – Messenger, Spitzer, and STEREO-B. The models also predict that the leading edge of the first CME will reach Earth at about 1:25 AM EST on the morning of March 8 (plus or minus 7 hours)."

We can only hope that the most worrying thing about that note is that NASA has followed the cable TV industry's lead in making their time estimates coincide with an entire workday.
This is the second-largest flare of the active solar flare season that started in 2008.

http://www.npr.org/blogs/thetwo-way/2012/03/07/148170132/sun-sends-solar-flares-speeding-toward-earth-will-hit-thursday-video