Tag: sunspot

Sunspot update: Activity remained high in March

12:35 pm

It is time for my monthly sunspot update. NOAA this week updated its graph that tracks the number of sunspots on the Sun’s Earth-facing hemisphere. This graph is posted below, with some additional details included to provide some context.

Last month the number of sunspots dipped slightly after a gigantic leap of activity in January. This month showed a small rise in activity, but not enough to bring levels back to the January’s levels. Nonetheless, activity remains the highest seen since 2014. when the last solar maximum was approaching its end, and continues to exceed significantly the 2020 prediction by NOAA’s panel of solar scientists.
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Sunspot update: After going through the roof last month, sunspots drop into the attic this month

11:05 am

With the start of another month NOAA this week updated its graph that tracks the number of sunspots on the Sun’s Earth-facing hemisphere. As I do every month, I have posted that updated graph below, adding some additional details to provide some context.

Last month the number of sunspots rocketed upward to the highest seen since 2014, and only the second time since November 2002 that the Sun was that active. In February those high numbers dropped, though the sunspot activity during the month remained well above the 2020 prediction by NOAA’s panel of solar scientists.

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Sunspot update: The most sunspots since 2014

9:26 am

Time for my monthly sunspot update, based on NOAA’s monthly graph that tracks the number of sunspots on the Sun’s Earth-facing hemisphere. The newest graph, with December’s numbers added to the timeline, is below. As always, I have added some additional details to provide context.

In December the half-year pause in the ramp up to solar maximum ceased, with the Sun seeing the most sunspots since September 2014. This high activity far exceeded the predicted sunspot count for December 2023, almost doubling it. In fact, December’s sunspot count almost equaled the predicted peak for the upcoming solar maximum, which is not supposed to happen until sometime in 2025.

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Sunspot update: The Sun’s unprecedented pause to maximum continues

9:44 am

It is the beginning of the month, and NOAA has once again published its update of its monthly graph that tracks the number of sunspots on the Sun’s Earth-facing hemisphere. Below is the newest graph, adding November’s numbers to the timeline and annotated by me with some additional details added to provide context.

Sunspot activity dropped in November, though still remained significantly higher than the prediction, a sunspot number of 77.6 compared to the predicted number of 57.4. At 77.6, the Sun continues the pause that began in June in the ramp up to solar maximum. For the past half year the Sun’s sunspot output has essentially stalled at approximately the same level.

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Sunspot update: Solar activity continues to exceed sunspot predictions

3:50 pm

It is the beginning of September and time to post another update on the Sun’s ongoing solar cycle. Below is NOAA’s monthly graph tracking the number of sunspots on the Sun’s Earth-facing hemisphere, with the activity in August now added. I have also added some additional details to the graph to give the numbers a larger context.

Though sunspot activity dropped in August it remained significantly above the predictions of the panel of government solar scientists put together by NOAA. The predicted sunspot number for August, as indicated by the red curve, was supposed to be about 48. The actual number was 75.

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Sunspot update: Activity recovers mostly from last month’s decline

9:04 pm

It is the start of the month, and thus time to post NOAA’s monthly update of its graph tracking the number of sunspots on the Sun’s Earth-facing hemisphere. That graph is below, with some additional details added by me to provide a larger context.

After the first real decline in sunspot activity in June, the Sun recovered that decline almost completely in July. Though the ramp up to solar maximum has stalled somewhat in the last two months, the trend continues to point to a very active maximum, much higher than predicted as well as much stronger than the last very weak maximum in 2020.

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Sunspot update: In May we had sunspots, sunspots, and more sunspots!

10:31 am

It is time for another sunspot update! On June 1 NOAA released its monthly update of its graph tracking the number of sunspots on the Sun’s Earth-facing hemisphere. As I do every month, I have posted it below, having added some addition details to provide a larger context.

In May the sunspot activity on the Sun almost literally exploded, producing some of the strongest solar flares in years as well as the most sunspots since the previous solar maximum in 2014. On several days there were as many as eight sunspot groups on the Sun, with one so large that it was visible to the naked eye on Earth (if viewed properly with a protective filter).
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Sunspot update: Sunspot activity continues to outpace predictions

3:23 pm

It is the first of the month, and NOAA has once again updated its monthly graph showing the long term trends in the Sun’s sunspot activity. As I do every month, I post it below, annotated with additional data to provide some context.

In March the Sun continued its unexpected high activity since the end of the solar minimum in 2020. The number of sunspots once again rose steeply, while also exceeding the predicted count for the month. The actual sunspot count for March was 78.5, not 34.1 as predicted. The last time the count was that high for any month was September 2015, when the Sun was just beginning its ramp down from solar maximum.
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Sunspot update: The Sun rages on

10:54 am

Time for my monthly sunspot cycle update, where I take NOAA’s monthly graph showing the long term trends in the Sun’s sunspot activity, and annotate it with additional data to provide some context.

The trend of sunspot activity exceeding the predictions continued in February. While the increase in activity from January still left it less than the activity in December, the total number of sunspots is still far above the number predicted by NOAA’s panel of solar scientists in 2020, with the rise towards a solar maximum also much steeper and far faster than predicted.
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Sunspot Update: The Sun quiets down, but just a little

11:50 am

With the posting yesterday by NOAA of its monthly update to its graph showing the long term trends in the Sun’s sunspot activity, it is time for me to do my own update, showing this graph below with annotations in order to provide some context.

While sunspot activity dropped slightly in January, the activity still remained well above the prediction made by NOAA’s panel of solar scientists in 2020, with the upward trend towards a solar maximum much steeper than predicted as well.
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Sunspot update: Sun continues to be more active than predicted

12:45 pm

Time for our monthly sunspot update, using NOAA’s most recent monthly graph of sunspot activity. That graph is below, annotated to show the previous solar cycle predictions and thus provide context. It covers all activity through the month of November.

The pattern for the past two years since the end of the solar minimum continues, with sunspot activity consistently exceeding the prediction of NOAA’s panel of solar scientists, as indicated by the red curve. The activity in November dropped very slightly from October, but remained more active than the prediction.

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Sunspot update: Sun continues its higher than predicted activity

11:57 am

With the beginning of a new month comes my monthly sunspot update, based on NOAA’s most recent monthly graph of sunspot activity. That graph is below, annotated to show the previous solar cycle predictions and thus provide context. It has now been extended from last month to include the Sun’s sunspot activity in October.

Sunspot activity in October continued to be higher than predicted, though the month saw a slight drop from September. Even so, the number of sunspots seen on the Sun’s facing hemisphere in October were the most since August of 2016, when the Sun was ramping down to solar minimum.

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Sunspot update: Activity in May continued to exceed predictions

11:07 am

Time for our monthly sunspot update. On June 1st NOAA updated its monthly graph showing the Sun’s sunspot activity through the end of May 2021. Below is that updated graph, annotated as always to show the previous solar cycle predictions.

As has happened now for almost every month since the Sun’s sunspot cycle began to increase following the long and deep minimum in 2019, the activity in June exceeded the numbers predicted by the computer models of NOAA’s panel of solar scientists. While the activity dipped slightly from April, it still was more active than predicted.

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Sunspot update November 2018: Minimum continues

11:26 am

NOAA’s monthly update of the solar cycle, covering sunspot activity for November 2018, was released yesterday. As I have done every month since this website began in July 2011, I am posting it below, annotated to give it some context.

November 2018 sunspot activity

The graph above has been modified to show the predictions of the solar science community. The green curves show the community’s two original predictions from April 2007, with half the scientists predicting a very strong maximum and half predicting a weak one. The red curve is their revised May 2009 prediction.

As I have been expecting now for the last three months, NOAA has finally revised this graph to extend it past the end of 2018. The graph below is the graph from October, which follows the layout and design used since 2007. You can see the differences by comparing the two graphs. In extending the new graph to the end of 2022, they fortunately did not change the design significantly. However, because the new graph has a slightly different scale, I have stretched the green and red curves to make them fit properly. While I suspect the poor quality of the 2007 and 2009 predictions is one reason they do not include them on their graph, I think it essential to add them to better understand the limitations of the science.
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Sunspot update for October 2017

9:23 am

NOAA today posted its monthly update of the solar cycle, covering sunspot activity for October. That graph is posted below, with annotations.

October 2017 Solar Cycle graph

The graph above has been modified to show the predictions of the solar science community. The green curves show the community’s two original predictions from April 2007, with half the scientists predicting a very strong maximum and half predicting a weak one. The red curve is their revised May 2009 prediction.

After two straight months of rising sunspot activity, the number of sunspots plunged in October, returning the numbers almost exactly back to the general trend we have seen since 2014 when the solar maximum ended. While the short two month increase indicated that the minimum will not occur as soon as this long term trend suggests, the quick return to that trend this month suggests that it will.

Meanwhile, November is six days old and has yet to see any sunspots at all.

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Sunspot ramp down continues

9:36 am

Below is NOAA’s monthly update of the solar cycle, posted by them on August 7. It shows the Sun’s sunspot activity in July, with annotations.

July 2016 Solar Cycle graph

The graph above has been modified to show the predictions of the solar science community. The green curves show the community’s two original predictions from April 2007, with half the scientists predicting a very strong maximum and half predicting a weak one. The red curve is their revised May 2009 prediction.

As expected, there was a recovery in sunspot activity in July compared to June. Also as expected, the recovery was not significant, so that it appears, based on the past two months, as if the ramp down to solar minimum is accelerating so that solar minimum will occur sooner than expected, possibly as soon as two years.

I would not put much stock on that prediction, however. When sunspot activity first reached this level during the past solar cycle in late 2005, it still took three more years before solar minimum was reached. If this cycle matches the last, that would mean that this cycle, from minimum to minimum, will have lasted 10 years, making a short solar cycle though not one of the shortest. However, it is more likely that the ramp down will stretch out, as it usually does, gliding downward to solar minimum in a slow gentle curve that makes for a full cycle of about 11 years.

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A short but weak solar maximum?

3:03 pm

On July 4th NOAA released its monthly update of the solar cycle, showing the Sun’s sunspot activity in June. It is annotated and posted below.

June 2016 Solar Cycle graph

The graph above has been modified to show the predictions of the solar science community. The green curves show the community’s two original predictions from April 2007, with half the scientists predicting a very strong maximum and half predicting a weak one. The red curve is their revised May 2009 prediction.

Not surprisingly, the time periods with no sunspots in June, including a 12 day stretch that just ended today, is reflected by the graph’s precipitous drop in June.

What is significant to me is the speed with which this solar maximum seems to be ending. Normally, weak solar cycles are also long solar cycles. The Sun not only doesn’t get as active, but the ramp up and down is extended, as is the period of the solar minimum. This is what happened during the solar minimum from 2007 to 2010. It was longer than normal, which meant that the solar maximum occurred much later than predicted by the 2007 predictions of the solar science communities (shown in green).

This recent stretch of blank days however is now suggesting that the solar maximum is going to end much sooner than the later 2009 prediction (shown in red). Even more astonishing, the numbers in June aligned with the 2007 high prediction, which would make this one of the shortest solar maximums on record!

I don’t expect these low numbers to continue. I expect sunspot activity to recover and continue, with the minimum likely occurring after 2018. If it does come sooner, however, that will once again be evidence suggesting we are heading for a Grand Minimum, with no sunspots for decades.

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The Sun goes bust

3:55 pm

It is that time of the month again. Today NOAA’s Space Weather Prediction Center today released its monthly update of the ongoing solar cycle sunspot activity, covering January 2012. I have posted the graph below the fold.

For the second month in a row the Sun’s sunspot activity plunged. The drop in activity has been so steep that it has cancelled out almost two thirds of the activity rise that occurred during the last half of 2010. In fact, the drop brings the Sun’s sunspot count back to numbers comparable with March of last year, hardly a sign of a fast ramp up to solar maximum, which is what solar scientists have come to expect the Sun to do. Instead, the Sun’s activity during this ramp up has fluctuated wildly, going up strongly for several months and then dropping precipitously for another few months. These wild swings have now repeated themselves four times since the fall of 2010.
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