Sunspot numbers are well below their values from 2011, and strong solar flares have been infrequent,’ says NASA, the world’s premier space agency says.
The image below shows the Earth-facing surface of the Sun on February 28, 2013, as observed by the Helioseismic and Magnetic Imager (HMI) on NASA’s Solar Dynamics Observatory.
It observed just a few small sunspots on an otherwise clean face, which is usually riddled with many spots during peak solar activity.
Experts have been baffled by the apparent lack of activity – with many wondering if NASA simply got it wrong.
However, Solar physicist Dean Pesnell of NASA’s Goddard Space Flight Center believes he has a different explanation.
‘This is solar maximum,’ he says.
‘But it looks different from what we expected because it is double-peaked.’
‘The last two solar maxima, around 1989 and 2001, had not one but two peaks.’
Solar activity went up, dipped, then rose again, performing a mini-cycle that lasted about two years, he said.
Nasa said that “sunspot numbers are well below their values from 2011, and strong solar flares have been infrequent.”
It went on:
The image above shows the Earth-facing surface of the Sun on February 28, 2013, as observed by the Helioseismic and Magnetic Imager (HMI) on NASA’s Solar Dynamics Observatory. HMI observes the solar disk at 6173 Ångstroms, a wavelength designed to study surface oscillations and the magnetic field. HMI observed just a few small sunspots on an otherwise clean face, which is usually riddled with many spots during peak solar activity.However, there is no reason to panic. Nasa explains in a lengthy and interesting post that the solar cycle is very complex, and can have multiple peaks and troughs over time. It’s worth a read if you’re interested or terrified.
Meanwhile solar flares are still occurring – one forced the Mars rover Curiosity into safe mode earlier this week – and the current lull is described as a “quiet interlude” rather than a potential source of humanity’s ultimate downfall.
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James Smith
March 9, 2013 at 1:21 pm
The entire solar cycle(s) are obviously not perfectly calculated. Some could be of such long duration (to us) that they have not been observed with modern instrumentation or at all.
It could be one of these cycles or combination of cycles is also affecting global warming. It would take a very small increase in in solar output for it to affect the earth, especially if it lasted over a number of years.
No, we don’t know everything and don’t always understand perfectly what we do know. That’s why one of my favorite expressions is, “I don’t understand all I know about that.”
We are learning and that’s what makes life so fascinating. It’s why we don’t need those faeries in the garden to appreciate the flowers. (to misquote Douglas Adams)
Norman Rampart
March 9, 2013 at 3:06 pm
The only unexpected thing happening to the sun in England at the moment is that it bothers to appear at all!!!
Our summers seem to be getting shorter. I think last year summer started on a Tuesday in August and ended Thursday of the same week.
As for a lack of sun spots…perhaps the sun has found a universe version of Clearasil? After all, the old guy isn’t a teenager anymore!!