As the Sun Turns: Solar Minimums and Maximums

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Maria
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Re: As the Sun Turns: Solar Minimums and Maximums

Post by Maria »

Luke wrote:

The face of the sun is calm today: http://www.spaceweather.com/

May everyone have a calm Lent this year.

Amen.

Lord Jesus Christ, have mercy on me a sinner.

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Luke
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Re: As the Sun Turns: Solar Minimums and Maximums

Post by Luke »

Spaceweather has an interesting chart called Radiation v. Altitude: http://www.spaceweather.com/cosmicrays/ ... s3dqi4iki2

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Maria
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Re: As the Sun Turns: Solar Minimums and Maximums

Post by Maria »

Luke wrote:

Spaceweather has an interesting chart called Radiation v. Altitude: http://www.spaceweather.com/cosmicrays/ ... s3dqi4iki2

Yes, this is a fascinating study that they have been doing for several years now.

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Maria
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Re: As the Sun Turns: Solar Minimums and Maximums

Post by Maria »

We have a new sunspot AR2700 facing us (geocentered).

It has rapidly developed since yesterday into a Beta configuration, and has at least five more days before it departs this side of the sun.

This in from NOAA:

Joint USAF/NOAA Solar Region Summary
SRS Number 58 Issued at 0030Z on 27 Feb 2018
Report compiled from data received at SWO on 26 Feb
I. Regions with Sunspots. Locations Valid at 26/2400Z
Nmbr Location Lo Area Z LL NN Mag Type
2700 N06W13 328 0030 Cro 04 06 Beta

The Royal Observatory at Belgium's Estimated International Sunspot Number (EISN) plot shows 18 sunspots for Feb. 26, and 19 sunspots for Feb. 27. This after almost a week of spotlessness. The average EISN for February 2018 stands at 12.

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Maria
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Re: As the Sun Turns: Solar Minimums and Maximums

Post by Maria »

For the last three days, AR2700 has been visible on the face of the sun.
Whereas it was a beta, now it has decayed to an alpha.

As a result, estimated international sunspot numbers (EISN) have increased. So far, the mean EISN
for the month of February is approximately 12.

Below is the daily text data from Belgium's Royal Observatory:
** indicates a very high standard (std) deviation, equal to or greater than 3.5.
Those observations with high std deviations and/or greater than 5 outliers most likely will undergo adjustments by Belgium.

2018 02 01 2018.086 0 0.0 28 29
2018 02 02 2018.089 0 0.0 20 26 (6 outliers)
2018 02 03 2018.092 0 0.0 21 23
2018 02 04 2018.095 0 0.0 29 40 (11 outliers)
2018 02 05 2018.097 15 2.2 37 42
2018 02 06 2018.100 18 2.8 30 34
2018 02 07 2018.103 22 3.5 36 39 **
2018 02 08 2018.105 25 4.4 33 39 ** (6 outliers)
2018 02 09 2018.108 27 2.9 28 34 (6 outliers)
2018 02 10 2018.111 28 4.1 23 26 **
2018 02 11 2018.114 30 3.3 28 31
2018 02 12 2018.116 28 4.0 33 39 ** (6 outliers)
2018 02 13 2018.119 25 3.7 33 39 ** (6 outliers)
2018 02 14 2018.122 23 4.2 32 39 ** (7 outliers)
2018 02 15 2018.125 17 2.9 30 35
2018 02 16 2018.127 14 2.0 39 44
2018 02 17 2018.130 0 0.0 26 29
2018 02 18 2018.133 0 0.0 34 36
2018 02 19 2018.136 0 0.0 17 19
2018 02 20 2018.138 0 0.0 27 28
2018 02 21 2018.141 0 0.0 37 38
2018 02 22 2018.144 0 0.0 43 44
2018 02 23 2018.147 0 0.0 35 36
2018 02 24 2018.149 0 0.0 40 42
2018 02 25 2018.152 0 0.0 35 43 (8 outliers)
2018 02 26 2018.155 18 3.7 34 45 ** (11 outliers)
2018 02 27 2018.158 17 2.0 34 38
2018 02 28 2018.160 12 2.1 30 35

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Maria
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Re: As the Sun Turns: Solar Minimums and Maximums

Post by Maria »

Below are the EISN plots from Belgium's Royal Observatory for Feb. 28, 2018

Daily Sunspot Plot thru 02-28-2018_EISNcurrent.png
Daily Sunspot Plot thru 02-28-2018_EISNcurrent.png (44.66 KiB) Viewed 1017 times

and March 1, 2018: Neither of these plots have been changed (yet).

Daily Sunspot Plot thru 03-01-2018_EISNcurrent.png
Daily Sunspot Plot thru 03-01-2018_EISNcurrent.png (43.49 KiB) Viewed 1017 times

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Re: As the Sun Turns: Solar Minimums and Maximums

Post by Luke »

. . . and March will have two full moons, March 2 & March 31. I look forward to the second one when holy week is just around the corner. :)

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