Friday, April 18, 2014

M7.3 Solar Flare : Minor Radiation Storm in progress


M7.3 Solar Flare Observed
A moderately strong solar flare measuring M7.3 was observed around region 2036 on Friday morning peaking at 13:03 UTC. The flare itself was long in duration and a coronal mass ejection (CME) is now visible in the latest STEREO Ahead COR2 imagery. A 10cm Radio Burst (TenFlare) measuring 1000 sfu and lasting 24 minutes was associated with the event. An event log for the M7.3 flare is now live at the link listed below. Imagery by SDO/EVE.
UPDATE: Energetic proton levels are now on the rise following the flare event. A minor radiation storm watch is now in effect.


Radiation Storm: Energetic proton levels streaming past Earth continue to rise and are now at the minor (S1) radiation storm threshold.

ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2014 Apr 18 1525 UTC
NOAA Scale: S1 - Minor
Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

GOES 1-min X-ray Plot

GOES Electron FluxACE EPAM Electrons

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