For solar wind dials without any explanatory text, see this page. It also has a few dials that are not shown here. A web page with more explanatory text is also available.

Current Space Weather Status

This "stoplight" shows the more severe of the following three gauges of space weather:

Latest Observations from the ACE spacecraft

Last Measurement (at Sun-Earth L1 Point): May 14, 2001 8:44 UT

Sun-Earth L1 Point is approximately 45 minutes upwind of the Earth.

Solar Wind

4.50 /cc 572. km/s 2.46 nP 99400. K

Interplanetary Magnetic Field

5.00 nT 37. degrees North 148. degrees Dawnward of AntiSunward
Link to Recent History of Solar Wind Parameters

Magnetospheric Response: Voltage Across the Polar Cap

38. kV
You can now receive e-mail notification whenever the stoplight sets to red! (Actually, you can be notified whenever any of these conditions change.) Just send e-mail to with the following in the body of the message:
SUBSCRIBE SPACALRT first_name last_name
For "Joe User" to subscribe, this would be:
Stoplight state changes are now logged. There are three logs, one for each condition index (KP,Solar Wind,and NOAA/SEC.) The earliest logged transition occurred on January 23, 1999.

More about the solar wind's recent behavior can be found on my Current Solar Wind Conditions page.
Also, here's an index to Space Weather Resources. Other items of interest include NOAA/SEC Current Conditions, my composite current Auroral Images page, Windows on the Universe: Space Weather, and Public Outreach Index, Department of Space Physics and Astronomy, Rice University.

This page has been accessed times since March 22, 1996.
Please accept my apologies for the recent inavailability of this page. The web server was taken down for an upgrade in late March 2000, and my account was locked out in the process. It took until April 7, 2000 for me to regain access.
Andrew L. Urquhart
Department of Space Physics & Astronomy
Rice University

Static information was last revised on 4/7/2000.