In less than 24 hours, the active region about to rotate into view has produced another X-class solar flare.
19:15 UT – The NASA GSFC Space Weather Research Center has estimated that the CME may give a glancing blow to STEREO B (~05/15/2013 18:00 UT) and Epoxi (~05/16/2013 00:00 UT) and hit Spitzer (~05/15/2013 06:00 UT).
17:54 UT – The SOHO LASCO C2 instrument observed a CME associated with the eruption that produced the X2.8 flare. These observations along with STEREO Behind indicate that the CME will probably not impact Earth.
17: 14 UT – A radio blackout (R3) on NOAA’s scale of R1-R3, was issued shortly after the flare. The current blackout level is now down to R1 as the X-ray level is still above M1. Here is a look at the current radio absorption predictions due to the X-rays hitting the atmosphere.
R3 alerts are issued at the X1 flare level and indicate a High Frequency radio (HF) and radio navigation blackout over the flare lit side of Earth for about 1 hour. At the R1 level the blackout is much weaker and intermittent.
16:05 UT – The flare peaked at X2.8.
16:03 UT – X flare in progress – currently at X2.4 (R3 radio blackout)
credit: NASA/SDO, NASA SWRC, helioviewer.org, NOAA/SWPC