Sunspot Numbers
Entry ID: gov.noaa.ngdc.G00532

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Summary
Abstract: ABSTRACT: In 1848 the Swiss astronomer Johann Rudolph Wolf introduced a daily measurement of sunspot number. His method, which is still used today, counts the total number of spots visible on the face of the sun and the number of groups into which they cluster, because neither quantity alone satisfactorily measures sunpsot activity.An observer computes a daily sunspot number by multiplying the ... View entire text

Purpose: PURPOSE: To provide long-term scientific data stewardship for the Nation's geophysical data, ensuring quality, integrity, and accessibility.
Related URL
Link: GET DATA
Description: FTP Index of all Sunspot Numbers
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Geographic Coverage
(Click for Interactive Map)
Spatial coordinates   
  N: 90.0   S: -90.0   E: 180.0   W: -180.0

Data Set Citation
Dataset Originator/Creator: Please See Summary
Dataset Title: Sunspot Numbers
Dataset Release Date: 1700
Dataset Release Place: Boulder, CO
Dataset Publisher: National Geophysical Data Center
Version: First
Other Citation Details: http://www.ngdc.noaa.gov/stp/SOLAR/ftpsunspotnumber.html
Online Resource: ftp://ftp.ngdc.noaa.gov/STP/SOLAR_DATA/SUNSPOT_NUMBERS
Temporal Coverage
Start Date: 1700-01-01
Science Keywords
ISO Topic Category
Project
Access Constraints ACCESS CONSTRAINTS: No Constraints

DISTRIBUTION LIABILITY: While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.

CUSTOM ORDER PROCESS: Contact data center for information
Use Constraints None
Ancillary Keywords
Data Set Progress
IN WORK
Data Center
National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce Supplemental Info
Data Center URL: http://www.ngdc.noaa.gov/
Dataset ID: ______SUNSPOTS ____

Data Center Personnel
Name: EDWARD H. ERWIN
Phone: (303) 497-6133
Fax: (303) 497-6513
Email: Edward.H.Erwin at noaa.gov
Contact Address:
NOAA/NESDIS/NGDC
E/GC2
325 Broadway
City: Boulder
Province or State: CO
Postal Code: 80303
Country: USA
Distribution
Distribution Size: 1.200
Distribution Format: ASCII
Fees: Please See Summary
Personnel
EDWARD H. ERWIN
Role: TECHNICAL CONTACT
Role: DIF AUTHOR
Phone: (303) 497-6133
Fax: (303) 497-6513
Email: Edward.H.Erwin at noaa.gov
Contact Address:
NOAA/NESDIS/NGDC
E/GC2
325 Broadway
City: Boulder
Province or State: CO
Postal Code: 80303
Country: USA
Creation and Review Dates
DIF Creation Date: 2009-06-15
Last DIF Revision Date: 2011-03-02

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