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Post by mikehaseler on Oct 5, 2011 11:28:31 GMT
I often see the sunspot data, but for some strange reason everyone just published the latest cycle so I can't see how this compares to previous ones.
I would like to quickly create a sunspot graph with sunspots per month in a format I could update using new data as it becomes available.
I've found a 5M file with masses of data on individual sunspots, but I would need to do an awful lot of work to make that usable and it must be available out there somewhere.
Can anyone tell me where.
PS. I tried searching this site, and internet.
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Post by justsomeguy on Oct 5, 2011 13:30:01 GMT
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Post by justsomeguy on Oct 5, 2011 14:03:11 GMT
Also, there are several discussions on how sunspot numbers are calculated, as often they do have different methods. HEre is one discussion: arxiv.org/ftp/astro-ph/papers/0702/0702068.pdfThere are also others at leif.org. Finally, how can find several historical records such as the Rome sunspot number. Finally, depending on what you are looking at sunspot area or 10.7 flux might be a better proxy than number. |
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Post by janjanssens on Oct 5, 2011 16:25:44 GMT
I often see the sunspot data, but for some strange reason everyone just published the latest cycle so I can't see how this compares to previous ones. I would like to quickly create a sunspot graph with sunspots per month in a format I could update using new data as it becomes available. I've found a 5M file with masses of data on individual sunspots, but I would need to do an awful lot of work to make that usable and it must be available out there somewhere. Can anyone tell me where. PS. I tried searching this site, and internet. The source for the official sunspotdata is the SIDC. They have daily, monthly and yearly data. sidc.oma.be/sunspot-data/Note the caution when comparing sunspot cycles as formulated by Leif Svalgaard in previous threads. Monthly sunspot area data can be found at solarscience.msfc.nasa.gov/greenwch.shtml My SC24 Tracking page contains links to data-sources for a variety of sunspot-related indices users.telenet.be/j.janssens/SC24web/SC24.html#Links |
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Post by justsomeguy on Oct 5, 2011 16:33:48 GMT
Nice site!
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Post by mikehaseler on Oct 5, 2011 17:27:34 GMT
Thanks, That was quick!
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andor
Level 2 Rank
Posts: 60
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Post by andor on Oct 10, 2011 12:22:26 GMT
I would also like to know why is it that everytime a new sunspot develops, it rotates from the non-facing side of the sun? Most of the new sunspots lately never develops on the earth facing side? Any reason for this?
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Post by jcarels on Oct 13, 2011 13:27:27 GMT
This is not the case. Have a look at some SDO videos and you will see that a lot of sunspot groups pop-up at "our" side of the sun.
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