SOLVING MAGNETOSPHERIC ACCELERATION, RECONNECTION AND TURBULENCE

SPACE WEATHER : REALTIME


Current space weather status: Sun Dec 11 02:01:03 UTC 2016

CONDITION

GAUGE

GREEN

Neural Network Predicted Kp Index
Index based on the most recent "predicted" Kp geomagnetic activity and the alert condition is determined as follows:
GREEN Kp < 4; YELLOW 4 <= Kp < 6; RED Kp >= 6

GREEN

Most Recent Kp Index
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 Kp < 4; YELLOW 4 <= Kp < 6; RED Kp >= 6

GREEN

Solar Wind Observations
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 PCP < 150 kV; YELLOW 150 kV <= PCP < 200 kV; RED 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)

avg_density
Solar Wind Density (Measured)
avg_speed
Solar Wind Speed (Measured)
avg_press
Solar Wind Pressure (Derived)
avg_temp
Solar Wind Temperature (Measured)
avg_btot
Interplanetary Magnetic Field Magnitude (Measured)
avg_polar
Interplanetary Magnetic Field Polar Angle (Derived)
avg_az degrees dawnward of antisunward
Interplanetary Magnetic Field Azimuth (Derived)
avg_pcp
Voltage Across the Polar Cap / Convection Potential (Derived)

Thermal Energy Density (Derived)

Log[Beta] (Derived)

Alfven Speed (Derived)

Sound Speed (Derived)

Alfven Mach Number (Derived)

Mach Number (Derived)

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 spacalrt-leave@mailman.rice.edu.

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.