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Laboratory for Atmospheric and Space Physics

X-28 Flare

November 4, 2003

Here is a plot of the XPS measurements (TIMED and SORCE) for the Nov. 4 monster X-28 flare. XPS saw an increase by a factor of 60 ! The solar EUV increase was about a factor of 1.5 and is lower than the EUV increase for the Oct. 28 X-17 flare, which was a factor of 2. The reason for the reduced EUV increase for the X-28 flare is because the sunspot group is near the limb and the EUV is emitted lower in the solar atmosphere than the X-ray emissions from the corona.

While there were CMEs and proton storms associated with this large flare event, these solar particles are not expected to have a large impact on Earth because they were released from the solar limb.

With these large sunspot groups rotating to the back side of the Sun now, the solar activity is expected to be relatively quiet (until the sunspots return in 2 weeks).

As before, the SOHO web site has images and movies of this large solarflare event.

SEE Flares 306 - 310
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