Solar minimum heading for spotless record

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brian livesey
Posts: 5386
Joined: Mon Jan 09, 2006 11:05 am
Location: Lancashire

Solar minimum heading for spotless record

Post by brian livesey »

During the the current solar minimum, no sunspots have been observed for 262 days. If this spotless period continues to the weekend, it will be a space-age record, beating the 2008-9 solar minimum of 268 days.
Previous to this, the longest spotless solar minimum was in 1913, with 311 spotless days. During deep solar minima when the Sun's magnetic field is at its weakest, the aurora are less likely to be seen at lower latitudes and cosmic radiation levels in Earth's atmosphere are higher.
On the other hand, noctilucent clouds are more likely to be observed.

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Re: Solar minimum heading for spotless record

Post by Brian »

SPA ENB No. 504 raises the prospect of another Dalton minimum ................
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