Largest Sunspot In Recent Years

April 01, 2001

Dramatic images of the largest sunspot to appear in a decade are available from the National Science Foundation's (NSF) National Solar Observatory.

What: Images were taken with the NSF's Richard B. Dunn Telescope at Sacramento Peak, Sunspot, N.M., on March 27; McMath-Pierce Telescope at Kitt Peak, Ariz., on March 30; and Global Oscillation Network Group (GONG) in Big Bear, Calif., on March 30. (Images should be credited to NSF National Solar Observatory)

Where: Images of the sunspot, with captions, are available at More information on the National Solar Observatory is available at

Background: Solar scientists estimated that the diameter of this sunspot reached more than 140,000 kilometers (86,800 miles) across, or 11 times the diameter of the earth, and large enough to be visible to the naked eye.
For more information, contact: Amber Jones 703-292-8070/

April 2, 2001
PA/M 01-12


Broadcast editors:
For animation of how a solar telescope works and b-roll of one of the telescopes, contact Dena Headlee, NSF 703-292-8070/

National Science Foundation

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