Neural Network Predicted Kp Index: Condition GREEN
This index is based on the most recent "predicted" Kp geomagnetic activity and the alert condition is determined as follows:GREEN if Kp < 4; YELLOW if 4 <= Kp < 6; RED if Kp >= 6
Most Recent Kp Index: Condition GREEN
This index is based on the most recent USAF/NOAA estimated planetary geomagnetic activity (Kp) 3-hour index. Our index is determined as follows:GREEN if Kp < 4; YELLOW if 4 <= Kp < 6; RED if Kp >= 6
Solar Wind Observations: Condition GREEN
This index is keyed to the estimated instantaneous "asymptotic voltage" across the polar cap, the single most important measure of electrical power delivered to the atmosphere from the solar wind. We now use data from the ACE real-time solar wind package. The index is determined as follows:GREEN if PCP < 150 kV; YELLOW if 150 kV <= PCP < 200 kV; RED if PCP >= 200 kV*
* The PCP status is changed to red only if the current 10-minute average exceeds 200 kV AND the previous 10-minute average exceeds 150 kV. This is designed to reduce shifts in status due to short-term spikes in the value of the potential.Latest Observations from the ACE spacecraft (at the Sun-Earth L1 point) :
Magnetospheric Response: Voltage Across the Polar Cap
Solar Wind
Interplanetary Magnetic Field
Link to Recent History of Solar Wind Parameters
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.
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 go to the Rice University Lists and subscribe to the SPACALRT Mailing List. To unsubscribe follow the instructions on the SPACALRT Mailing List page, or send an e-mail to this address.
Stoplight state changes are once again logged. There are two logs, one for each predicted Kp (Kp) and PCP (Solar Wind). The earliest logged transition occurred on September 25, 2003.
Also, here's an index to Space Weather Resources. Other items of interest include NOAA/SEC Current Conditions, the composite current Auroral Images page, Windows on the Universe: Space Weather, and Public Outreach Index, Department of Physics and Astronomy, Rice University.
Patricia H. Reiff
(reiff@rice.edu) Department of Physics & Astronomy
Rice University
Static information was last revised on April 13, 2011.