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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Monday, August 21, 2017 15:55:36

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NOAA Scales mini

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Space Weather Conditions
24-Hour Observed Maximums
R
no data
S
no data
G
no data
Latest Observed
R
no data
S
no data
G
no data
R1-R2 --
R3-R5 --
S1 or greater --
G
no data
R1-R2 --
R3-R5 --
S1 or greater --
G
no data
R1-R2 --
R3-R5 --
S1 or greater --
G
no data
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R
no data
S
no data
G
no data
Current Space Weather Conditions
R1 (Minor) Radio Blackout Impacts
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HF Radio: Weak or minor degradation of HF radio communication on sunlit side, occasional loss of radio contact.
Navigation: Low-frequency navigation signals degraded for brief intervals.
More about the NOAA Space Weather Scales

Van Allen Probes Radiation Belt Plots

L-shell Plot

L-shell plot

Electron Flux Plot

Electron Flux plot

The L-shell plot displays the 2 MeV differential electron flux in the various L-shells measured by the Van Allen Probes.  L is McIlwain's (1961) shell parameter, which at the magnetic equator corresponds to the radial distance from Earth's center expressed in units of Earth radii.  This plot allows forecasters and customers to quickly assess the temporal and spatial changes in the radiation belts and is of interest to space vehicle operators.

The GOES/RBSP Electron Flux plot provides a comparison between >2 MeV integral electron flux reported by the GOES spacecraft in geosynchronous orbit and the same measurement reported by the Van Allen Probes.  Additionally, the plot on the right depicts the relative positions of the GOES and Van Allen Probe spacecraft.  This plot also allows forecasters and customers to quickly assess the temporal and spatial changes at and within geosynchronous orbit and is of interest to operators of space vehicles.

The L-Shell plot displays the 2 MeV differential electron flux over a year (top), 54 days or two solar rotations (middle), and 7 days (bottom).  Additionally, the 54 day solar wind speed is plotted above the 54 day flux plot, and the 7 day planetary K-index history appears above the 7 day flux plot.

The GOES/RBSP Electron Flux plot provides a comparison between >2 MeV integral electron flux reported by the GOES spacecraft and the same measurement reported by the Van Allen Probes.  Additionally, the plot on the right depicts the relative positions of the GOES and Van Allen Probes spacecraft.

These data are collected by the Level 2 and SpWx data from the MagEIS instrument of the ECT instrument suite aboard the Van Allen Probes.

These are new, experimental plots provided by Johns Hopkins University Applied Physics Laboratory and the NASA Van Allen Probes team for the operational space weather community.  Additional, customizable plots are available at the Van Allen Probes Science Gateway.

A link for previous plots will be made available in the near future; however, additional data can be found at the Van Allen Probes Science Gateway.