Solar Observing and SID Monitoring

Topic	Replies	Last reply
Normal topic	sunspot groups 2022/12/07 By 1970maurizio 1 year 5 months ago	6	By 1970maurizio 1 year 5 months ago
Normal topic	Ideas for solar observations/fun projects using cosmic ray detectors/geiger counters, anyone? By Bikeman 1 year 8 months ago	4	By darius 1 year 5 months ago
Normal topic	On-line Conference - How to count sunspots By darius 1 year 5 months ago	0	n/a
Normal topic	How sunspot groups are numbered, labeled on images of solar disc ? By darius 1 year 4 months ago	0	n/a
Normal topic	AR3162, AR3163, AR3166 By 1970maurizio 1 year 4 months ago	4	By darius 1 year 4 months ago
Normal topic	How to access DigiSun application developed at the WDC-SILSO (Brussels) for tests ? By darius 1 year 4 months ago	0	n/a
Normal topic	Rudolf Wolf - Sunspot observations in the second half of the year 1849 By darius 1 year 4 months ago	0	n/a
Normal topic	On-line Vision Test for sun watchers, sketching sunspots By darius 1 year 4 months ago	2	By darius 1 year 4 months ago
Hot topic	How to count sunspots? By davidjayjackson 9 years 6 months ago	17	By darius 1 year 4 months ago
Normal topic	Happy New Year - Happy 2023 Solar Observing By darius 1 year 4 months ago	0	n/a
Normal topic	For instance, on April 20, 1948, the 30 observers reporting 13 14 A. H. SHAPLEY through the American Association of Variable Star Observers Solar Division gave numbers (10(7 +f) from 41 to 318; ad- justed to the Wolf scale the range was 91 to 322. By darius 1 year 4 months ago	4	By darius 1 year 4 months ago
Normal topic	Could you check 10 sunspots on 5 Jan 2023, Royal Observatory of Belgium counted: 47 By darius 1 year 4 months ago	3	By darius 1 year 4 months ago
Normal topic	Royal Observatory vs. SpaceWeather.com Wolf number: 159 vs. 117 (09 Jan 2023) what's wrong ? By darius 1 year 4 months ago	4	By darius 1 year 4 months ago
Normal topic	Forum Posting Issues By bpablo 1 year 3 months ago	0	n/a
Normal topic	comparison of results with the Solar bulletin By 1970maurizio 1 year 3 months ago	3	By 1970maurizio 1 year 3 months ago
Normal topic	2022 Solar Bulletins and SID Reports By lward 2 years 2 months ago	11	By lward 1 year 3 months ago
Normal topic	Sun photo from satellite By 1970maurizio 1 year 4 months ago	5	By 1970maurizio 1 year 3 months ago
Normal topic	GIANT SUNSPOT visible with naked eye, as observed 1,000+ years ago by the Chinese ? By darius 1 year 3 months ago	4	By darius 1 year 3 months ago
Normal topic	Solar Section e-mail By AAX 1 year 3 months ago	1	By bpablo 1 year 3 months ago
Normal topic	pores or sunspots? By 1970maurizio 1 year 3 months ago	7	By tst 1 year 3 months ago
Normal topic	The importance of visual counting (PLEASE READ) By LKR 1 year 3 months ago	0	n/a
Normal topic	AR3210, 3211, 3212: three different groups? By 1970maurizio 1 year 3 months ago	1	By HRHA 1 year 3 months ago
Normal topic	Sunspot number recalibration - a new article published in the latest issue of Solar Physics By rsainth1 1 year ago	1	By HRHA 1 year ago
Normal topic	glass solar filter By 1970maurizio 1 year 2 months ago	9	By tst 11 months ago

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