Solar Science

A blog of solar physics

It comes from the Far Side..?

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After being starved of any significant solar activity for so long, any detection of a sunspot very nearly becomes headline news. Therefore when a significant spot is detected on the solar farside, people start writing furiously.

So what to do? The first detection of a potential (and substantial) sunspot in more than a month came from GONG

But will it survive to the nearside?

There’s something that might be a spot on the far eastern limb of the latest STEREO image

But GONG now shows nothing at all

GONG data as of 16th September 2009

GONG data as of 16th September 2009

So what to believe? The next few days should show whether we’re looking at a spot or a plage. I confess that the sensitivity of the seismic results interpreted by GONG are often less accurate as to whether we are seeing a solar disturbance (like a coronal hole or a prominence) or a real sunspot.

I suspect that this is continuation of a pattern we have been seeing for many months, a single sunspot or very small group with SC24 polarity passes in front of us, but nothing else happens and the Sun’s activity quickly falls back to very low levels.

Because of this phenomenon, the most likely response from the solar science community is likely to be muted, after so many false dawns.

Solarcycle24.com has produced a graph showing the remarkable difference between the spotless days between solar cycles 22 and 23 and between 23 and 24.

There’s no end in sight for this minimum.

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Written by John A

September 16, 2009 at 9:15 pm

Posted in Solar Cycle 24

Tagged with , ,

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