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Space Weather Indices

This page provides access to plots of several indices of solar and geomagnetic activity that are frequently used as inputs to space-weather models. Brief definitions of each of the indices plotted are as follows:

Additional information defining the various indices are included with the expanded plots that are obtained by clicking on the "button" versions of the plots on this page. References for the various indices are listed at the end of each page of expanded plots.

Tabular listing of selected indices.

Maps of Geomagnetic Latitude and Regimes

Near Real-Time Plots

Picture Plot of (Provisional) Kp Geomagnetic Activity Index and DSCOVR solar wind data

Picture Plot of Qe Auroral Oval Index and DSCOVR solar wind data

Picture Plot of R/T 24hr SSNe Index

Plots of Daily Indices

Picture 10.7cm Solar Radio Flux (Observed and Inferred)

Picture Effective SSN and T Indices

Picture Geomagnetic Daily Ap Index (Provisional)

Picture Comparison of SSN Indices

PICTURE Plots of NOAA/SWPC 27-day F10 and Ap Forecasts

PICTURE Track the status of the solar-cycle: one year of SSNe

PICTURE Cycles 23 and 24 Effective Sunspot Number plot.

The data shown in these plots came from the following sources:

If you would like to get a feel for how effective these effective-SSN indices are, foF2 plots comparing the observations with model foF2 values calculated using the NWRA SSNE and SWS T values are available. There is a one-day delay between the latest SSNe values available and these plots to permit more data to arrive at the NOAA SWPC for comparison.

Boulder Plot Daily foF2 Comparison Plots

If you are interested in further information regarding ionospheric radio propagation, the Radio Society of Great Britain Propagation Studies Committee has a large collection of links to things propagational.

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