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The Wolf number (also known as the relative sunspot number or Zürich number) is a quantity that measures the number of sunspots and groups of sunspots present on the surface of the Sun. Historically, it was only possible to detect sunspots on the far side of the Sun indirectly using helioseismology. Since 2006, … See more
The relative sunspot number $${\displaystyle R}$$ is computed using the formula
$${\displaystyle R=k(10g+s)}$$
where See moreThe accuracy of the compilation of the group sunspot number series has been questioned, motivating the development of several alternative series suggesting different behavior of sunspot group activity before the 20th century. However, indirect indices of solar … See more
Wikipedia text under CC-BY-SA license Wolf number - Wikiwand
The Wolf number (also known as the relative sunspot number or Zürich number) is a quantity that measures the number of sunspots and groups of sunspots present on the surface of the …
Revisiting the Sunspot Number | Space Science …
Aug 5, 2014 · We finally conclude with future prospects opened by this epochal revision of the Sunspot Number, the first one since Wolf himself, and its reconciliation with the Group Number, a long-awaited modernization that will …
Sunspot Observations of Rudolf Wolf from 1849 – 1893
- On 25 March 1847, Johann Rudolf Wolf (1816 – 1893) (see Figure 1) was appointed director of the observatory in Berne (Wolf, 1866, 1879; Graf, 1896; Flury, 1929; Verdun, 2004). The observatory had been founded by Johann Friedrich Trechsel (1776 – 1849) in 1821 to secure the geodetic zero-point of Switzerland established in 1812 during the French occ...
- Author: Thomas K. Friedli
- Email: thomas.k.friedli@bluewin.ch
- Publish Year: 2016
- Estimated Reading Time: 10 mins
Sunspot Numbers | NCEI - National Oceanic and …
Many refer to the sunspot number as a Wolf number or count (or as a Zurich Sunspot Number). Results, however, vary greatly, since the measurement strongly depends on observer interpretation and experience and on the …
Sunspot Number Data | NCEI - National Oceanic and Atmospheric ...
The relative sunspot number is defined as R = K (10g + s), where g is the number of sunspot groups and s is the total number of distinct spots. The scale factor K (usually less than unity) …
Wolf, Rudolf (1816–1893), and Wolf number | SpringerLink
Wolf is best remembered for his development of a qualitative definition for sunspot number and its application to the existing historical data to see if Schwabe's cyclical variation could be …
The Wolf sunspot number - SIDC
Learn how the Wolf Sunspot Number is derived from daily drawings of the solar disk by Professor David and his team at the Royal Observatory of Belgium. The Wolf Number reflects the solar activity cycle of 11 years and its variations.
Wolf Number | COSMOS - Swinburne
The Wolf number, also known as the Zurich sunspot number, is calculated using the number of groups and spots of sunspots observed daily. It is used to monitor the sunspot cycle …
Wolf number Definition & Meaning - Merriam-Webster
The meaning of WOLF NUMBER is sunspot number.
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