{"id":188,"date":"2019-06-16T03:13:43","date_gmt":"2019-06-16T01:13:43","guid":{"rendered":"http:\/\/www.issibern.ch\/teams\/solheliomagnet\/?page_id=182"},"modified":"2026-03-10T14:38:28","modified_gmt":"2026-03-10T14:38:28","slug":"dataset-of-sunspot-field-strengths-and-polarities-1917-2015","status":"publish","type":"page","link":"https:\/\/www.issibern.ch\/teams\/solheliomagnet\/datasets-relevant-to-the-project\/dataset-of-sunspot-field-strengths-and-polarities-1917-2015\/","title":{"rendered":"Dataset of Sunspot Field Strengths and Polarities 1917-2016"},"content":{"rendered":"

Digitization team<\/strong>:
\nAlexei A. Pevtsov<\/a>, Kseniya A. Tlatova<\/a>, Alexander A. Pevtsov<\/a>, Elina Heikkinen, Ilpo Virtanen<\/a>, Nina V. Karachik<\/a>, Luca Bertello<\/a>, Andrey G. Tlatov<\/a>, Roger Ulrich<\/a>, Kalevi Mursula<\/a><\/p>\n

\n

Data type<\/strong>: dataset<\/p>\n

Publication date<\/strong>: 2 July 2019<\/p>\n

DOI<\/strong>: 10.25668\/bkt9-4d24<\/a><\/p>\n

Abstract<\/strong>:
\nThis database contains information extracted from hand-drawings of sunspot magnetic field observations from Mount Wilson Observatory for 1917-2015 period. Systematic observations of magnetic field strength and polarity in sunspots began at Mount Wilson Observatory (MWO), USA in early 1917. Except for a few brief interruptions, this historical dataset continues till present. A detailed description of MWO synoptic program of magnetic field observations and the digitization of this dataset can be found at: Pevtsov, A.A., Tlatova, K.A., Pevtsov, A.A., Heikkinen, E., Virtanen, I. I.,\u00a0 Karachik, N.V., Bertello, L., Tlatov, A.G., Ulrich, R., and Mursula, K: 2019, “Reconstructing solar magnetic fields from historical observations. V. Sunspot magnetic field measurements at Mount Wilson Observatory<\/strong>“, Astron. Astrophys., 628<\/strong>, A103, DOI: 10.1051\/0004-6361\/201834985<\/a><\/p>\n

Images of scanned drawings are available via DOI: 10.25668\/7gvh-sh82<\/a><\/p>\n

Recommended citation<\/strong>:
\nPevtsov, A.A., Tlatova, K.A., Pevtsov, A.A., Heikkinen, E., Virtanen, I., Karachik, N.V., Bertello, L., Tlatov, A.G., Ulrich, R., Mursula, K., 2019, “Sunspot magnetic field and polarity measurements at Mount Wilson Observatory 1917 – 2016”, DOI: 10.25668\/bkt9-4d24<\/p>\n

This work is licensed under a Creative Commons Attribution 4.0 License<\/a>.<\/p>\n

Download data: <\/strong>historicalsolardata.org\/MWO_Sunspots<\/a>\/ (MySQL query<\/b><\/span><\/span>)<\/p>\n","protected":false},"excerpt":{"rendered":"

Digitization team: Alexei A. Pevtsov, Kseniya A. Tlatova, Alexander A. Pevtsov, Elina Heikkinen, Ilpo Virtanen, Nina V. Karachik, Luca Bertello, Andrey G. Tlatov, Roger Ulrich, Kalevi Mursula Data type: dataset Publication date: 2 July 2019 DOI: 10.25668\/bkt9-4d24 Abstract: This database … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"parent":186,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-188","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.issibern.ch\/teams\/solheliomagnet\/wp-json\/wp\/v2\/pages\/188","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.issibern.ch\/teams\/solheliomagnet\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.issibern.ch\/teams\/solheliomagnet\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.issibern.ch\/teams\/solheliomagnet\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.issibern.ch\/teams\/solheliomagnet\/wp-json\/wp\/v2\/comments?post=188"}],"version-history":[{"count":2,"href":"https:\/\/www.issibern.ch\/teams\/solheliomagnet\/wp-json\/wp\/v2\/pages\/188\/revisions"}],"predecessor-version":[{"id":234,"href":"https:\/\/www.issibern.ch\/teams\/solheliomagnet\/wp-json\/wp\/v2\/pages\/188\/revisions\/234"}],"up":[{"embeddable":true,"href":"https:\/\/www.issibern.ch\/teams\/solheliomagnet\/wp-json\/wp\/v2\/pages\/186"}],"wp:attachment":[{"href":"https:\/\/www.issibern.ch\/teams\/solheliomagnet\/wp-json\/wp\/v2\/media?parent=188"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}