All information on this page is provided by the Space Environment Center (SEC). The Space Environment Center real-time database is the most timely and extensive space weather database in the world.  

The Space Environment

The apparent void between Sun and Earth is actually a maelstrom of wind and storm, with interludes of calm, always bathed in the harsh glow of ultraviolet and x-ray light. So strong is the outpouring solar wind that Earth's magnetic envelope is distorted, quivering even as it protects the fragile life on our planet.

Solar Cycles

The Sun goes through cycles of high and low activity that repeat approximately every 11 years. The number of dark spots on the Sun (sunspots) marks this variation; as the number of sunspots increases, so does solar activity.Sunspots are sources of flares, the most violent events in the solar system. In a matter of minutes, a large flare releases a million times more energy than the largest earthquake.

Solar-Terrestrial Effects

Episodic solar activity has a number of effects that are of interest to us. A radiation dose from energetic particles is an occasional hazard for astronauts and for electronics on satellites. Geomagnetic field disturbances may damage power systems, disrupt communications, degrade high-tech navigation systems, or create the spectacular aurora (Northern and Southern lights). SWO provides warnings of these events and continues the solar monitoring that began 400 years ago with Galileo's invention of the telescope.

Related Information

• Today's Space Weather
• Daily Solar Data
• Solar Cycle Prediction of Smoothed 10.7cm flux
• Solar Cycle Prediction of Smoothed Sunspot Number
• Solar Cycle Predictions plot (gif image)
• High-Frequency Radio Propagation Report
• Weekly: 27-Day Outlook of 10.7cm flux, Ap, and largest Kp
• Geomagnetic A and K Indices
• Geophysical Alert Message

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