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[Propagation] M1.4 Magnitude X-ray Flare 28 January 2011

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Subject: [Propagation] M1.4 Magnitude X-ray Flare 28 January 2011
From: "Tomas Hood (NW7US)" <nw7us@sunspotwatch.com>
Date: Thu, 27 Jan 2011 23:01:17 -0700
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At 0104 UTC, 28 January 2011, an X-ray flare with a flux magnitude of M1.4  
erupted, unleasing a coronal mass ejection.  The associated coronal mass  
ejection was not directed toward Earth, so it will not affect radio  
propagation at all.  The only affect was the immediate (within eight  
minutes) where there was a short-lived Sudden Ionospheric Disturbance on  
lower frequencies, and, there was also a Type II radio burst (a rushing  
wind sound on HF).

The source of the eruption was the active sunspot region 11149 (and  
possibly involved the region 11147, which is north of 11149).  These have  
now rotated out of view from Earth.  That's why the CME is not heading our  
way.  it erupted out into space away from us.

Here are a few movies I've posted:

The actual flare and CME as seen at the 304 Angstrom wavelength:

<http://www.youtube.com/watch?v=hMCgrJWTtR0 >

The CME as seen by LASCO C2:

<http://www.youtube.com/watch?v=Q1diDvKgqtw >

The active Sunspot regions 11147 and 11149, showing flares and surges  
prior to the M1.4 Magnitude flare:

<http://www.youtube.com/watch?v=dW2IgXy53U0 >

-- 
73 de NW7US,

Tomas David Hood
Hamilton, Montana

<http://nw7us.us/> and <http://tomas-david-hood.com/>

Contributing editor, Propagation Columns:
   CQ Magazine, CQ VHF, Popular Communications
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