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Solar Cycle 24 and VHF Aurora Website (www.solarcycle24.com)

Belgium World Data Center for the sunspot index

Sunspot images in high-res Impressive collection of sunspot images

NOAA Solar Cycle Progression : Current solar cycle.

Lockheed Martin Solar and Astrophysics Lab

Sun|trek website An educational resource for teachers and students about the Sun and its effect on the Earth

Tools to display the current sunspot number in a browser

Propfire - displays current sunspot number in browser status bar

HamLinks Toolbar - displays solar flux, A Index and K Index data in a toolbar

The Sharpest View of the Sun

Daily Sunspot Update and Picture of the Sun (www.spaceweather.com)

Animated explanation of Sunspots in the Photosphere  (University of Glamorgan)

International Sunspot Number—sunspot maximum and minimum 1610–present; annual numbers 1700–present; monthly numbers 1749–present; daily values 1818–present; and sunspot numbers by north and south hemisphere. The McNish-Lincoln sunspot prediction is also included.