16:16 UT - NASA SWRC simulations indicate that the leading edge of the CME will reach Spitzer at 2:56 UT 5/19/2013 and Earth at 11:59 UT 5/19/2013 (+- 7 hrs). Roughly estimated expected maximum Kp index is 5-6 (minor to moderate). 14:30 UT – Initial estimates for the CME speed are ~1200 km/s. A detailed computer [...]
Larger than the First! – (Update) 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 [...]
M6.5 solar flare, Earth-bound CME and a particle storm! AR11719 produced the largest flare of the year, an M6.5, peaking in GOES X-ray at 7:16 UT on April 11. First, we have a snapshot of the flare from the SDO/AIA 171 and 131 angstrom cameras. This shows us solar flare plasma from about 600,000 Kelvin [...]
Two solar filaments lifted off the sun in beautiful eruptions on January 23, 2013. Both eruptions produced coronal mass ejections or CMEs observed with the SOHO LASCO C2 coronagraph at 3:12 UT and 14:12 UT respectively. The first eruption off the southeast solar disk produced a CME headed away from Earth towards the [...]
Possible Moderate to Severe Geomagnetic Storm Sunspot group, AR11520, produced an X1.4 solar flare, peaking in the NOAA GOES X-ray monitor at 16:52 UT (12:52 EDT). This flash of electromagnetic radiation temporarily altered the upper atmosphere changing its ability to reflect and transmit certain radio frequencies. This produced a radio blackout lasting around 1 hour. [...]
Over the past 24 hours, sunspot group AR11513 has increased in complexity, producing several C-class flares and 2 M-class flares, an M2.4 on June 28 at 16:07 and an M2.2 on June 29 at 9:10 UT . Both AR11513 and AR11512 show some promise for more activity including M-class flare events over the next 24 [...]
4 M-class Flares and More A new active region (AR11476) has been rotating into view during the beginning of May 2012. It has been producing CMEs and by May 5th it started releasing small M-class flares and lots of C-class flares. Between May 5-6, it produced 4 M1 flares. The video below shows the 4 [...]
At 17:40 UT, the Sun produced a C2 solar flare with a radio burst and a SCORE-C CME. NASA Goddard Space Weather Center predicts it will reach Earth 4/27/2012 at 5:49 UT with only minor impact. Currently, there is a small geomagnetic storm underway so those at high latitudes have a chance for Aurorae.