Difference between revisions of "File:Sunspot Numbers.png"

From PSRG Wiki
Jump to navigation Jump to search
(This figure summarizes sunspot number observations. Since c. 1749, continuous monthly averages of sunspot activity have been available and are shown here as reported by the Solar Influences Data Analysis Center, World Data Center for the Sunspot Index,...)
 
m (add license information)
 
Line 6: Line 6:


This figure was prepared by Robert A. Rohde and is part of the Global Warming Art project.
This figure was prepared by Robert A. Rohde and is part of the Global Warming Art project.
This file is licensed under the [https://creativecommons.org/licenses/by-sa/3.0/ Creative Commons Attribution-Share Alike 3.0 Unported license.]

Latest revision as of 08:37, 23 May 2017

This figure summarizes sunspot number observations. Since c. 1749, continuous monthly averages of sunspot activity have been available and are shown here as reported by the Solar Influences Data Analysis Center, World Data Center for the Sunspot Index, at the Royal Observatory of Belgium. These figures are based on an average of measurements from many different observatories around the world. Prior to 1749, sporadic observations of sunspots are available. These were compiled and placed on consistent monthly framework by Hoyt & Schatten (1998a, 1998b).

The most prominent feature of this graph is the c. 11 year solar magnetic cycle which is associated with the natural waxing and waning of solar activity.

On longer time scales, the sun has shown considerable variability, including the long Maunder Minimum when almost no sunspots were observed, the less severe Dalton Minimum, and increased sunspot activity during the last fifty years, known as the Modern Maximum.

This figure was prepared by Robert A. Rohde and is part of the Global Warming Art project.

This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current08:26, 23 May 2017Thumbnail for version as of 08:26, 23 May 20171,020 × 425 (78 KB)KI7LBE (talk | contribs)This figure summarizes sunspot number observations. Since c. 1749, continuous monthly averages of sunspot activity have been available and are shown here as reported by the Solar Influences Data Analysis Center, World Data Center for the Sunspot Index,...

The following page uses this file:

Metadata