Monthly sunspot numbers

Time Interval: Monthly
Time Coverage: 1749 to 2006
Update Status: Periodically updated

Get Data:

Sunspot: Standard CDC Format (What is standard format?)
Sunspot: Original

Source:
Data is from SIDC at http://sidc.oma.be/DATA/monthssn.datl
References:

1. See http://sidc.oma.be/html/SIDCpub.html

This page hosted by: NOAA ESRL Physical Sciences Division Document maintained by Cathy Smith (cathy.smith@noaa.gov) Updated: Sep 28, 2007 16:37:19 MDT http://www.cdc.noaa.gov/Pressure/Timeseries/SUNSPOT/index.html