Sunspot activity near cycle minimum and what it might suggest for cycle 24, the next sunspot cycle
By: Robert M. Wilson and David H. Hathaway
Contributors: Hathaway, David H.; George C. Marshall Space Flight Center
Series: NASA/TP -- 2009-216061; NASA technical paper -- 216061.
Publisher: National Aeronautics and Space Administration, Marshall Space Flight Center
Published: 2009
Place of publication: Huntsville], Ala
Language: eng
Format: [electronic resource] /
Number of pages: 45
Subjects: Activity cycles (biology); Sunspots; Sunspot cycle; Latitude
Notes: Title from title screen (viewed on Aug. 22, 2011).

"September 2009."

Includes bibliographical references (p. 43-45).